Tag Archives: Digital Hotspot

One of the responsibilities of the Technical Coordinator in the Ohio Section is to submit something for the Section Journal. The Section Journal covers Amateur Radio related things happening in and around the ARRL Ohio Section. It is published by the Section Manager Tom – WB8LCD and articles are submitted by cabinet members.

Once my article is published in the Journal, I will also make it available on my site with a link to the published edition.

You can receive the Journal and other Ohio Section news by joining the mailing list Tom has setup. You do not need to be a member of the ARRL, Ohio Section, or even a ham to join the mailing list. Please sign up!

If you are an ARRL member and reside in the Ohio Section, update your mailing preferences to receive Ohio Section news in your inbox. Those residing outside the Ohio section will need to use the mailing list link above. Updating your ARRL profile will deliver news from the section where you reside (if the leadership chooses to use this method).

Go to www.arrl.org and click the Login button.
Login
When logged in successfully, it will say “Hello <Name>” in place of the Login button where <Name> is your name. Click your Name. This will take you to the “My Account” page.
On the left hand side, under the “Communication” heading (second from the bottom), click Opt In/Out
To the right of the “Opt In/Out” heading, click Edit
Check the box next to “Division and Section News.” If it is already checked, you are already receiving the Ohio Section Journal.
Click Save
There should now be a green check mark next to “Division and Section News.” You’re all set!

Now without further ado…

Read the full edition at:

THE TECHNICAL COORDINATOR
Jeff Kopcak – TC
k8jtk@arrl.net

Hey gang,

Pi-Star was great. It solved big problems for hams wanting to use VHF and UHF digital modes around 2016-2017. Personal hotspots were becoming popular. Consisting of a digital interface (modem) board capable of transmitting and receiving digital modes such as DMR, D-STAR, and System Fusion. These transceiver options are low power at about 10mW. The modem interfaced with software to manage network connections. Many devices were created for the popular Raspberry Pi or Arduino single-board computers using the GPIO headers. Others were USB-based devices that could be used with a desktop computer running any operating system or plugged into a Raspberry Pi.

The hardware was pretty solid. Software, not so much. Nearly each group attempted to make their own software distribution. In general, this failed as users couldn’t get the software to work consistently and settings didn’t work as expected – even across users with similar setups. Many didn’t have monitors connected. VNC, a remote desktop sharing application, was used. VNC generally works well desktop-to-desktop, but not desktop-to-mobile. These problems weren’t helping promote digital modes and personal hotspots.

Then along came Pi-Star. Created and maintained by Andy – MW0MWZ, it solved nearly all those problems. On the hardware site, Pi-Star supported every digital modem in a single platform. MMDVM is the software capable of “speaking” different digital mode protocols and managing network connections. It came with a web front-end that did everything needed to configure and manage devices, update network settings, update device firmware, and have a nice usable dashboard. Ultimately, the Pi-Star platform superseded all previous attempts at a viable interface for digital ham radio hotspots.

On the Pi-Star site, version 4.1.5 dated October 2021 is the latest image available for Raspberry Pi. However, 4.1.6 is available through the update sequence pistar-update then pistar-upgrade at the command line, both prefixed with sudo. Pi-Star 4.1.5/6 release is based on Raspbian 10 (buster) which has reached end-of-life. Raspbian, the standard Raspberry Pi operating system, follows the Debian release schedule. Debian 10 is out of standard security updates and into LTS (long term support). Raspbian does not offer LTS.

If you’ve read my column long enough, you know the majority of vulnerability issues can be avoided by keeping systems updated and patched. I’m also reminded of the time when I went searching and found there are Pi-Star’s accessible directly from the Internet, with the default password. What could possibly go wrong?

By all accounts, and as of this writing, Andy is no longer maintaining Pi-Star. Looking at his post count in the forums: zero in 2023 and ten in 2022. There are very few updates to GitHub repositories in the last two years, which are used to update Pi-Star devices. I’ve seen references to lack of updates due to lack of interest. Pi-Star is also lacking the latest additions to MMDVM including M17 and FM for boards that support those modes (usually through firmware updates).

The next iteration of Pi-Star (or fork) comes to us via W0CHP, called “W0CHP-PiStar-Dash (WPSD).” I learned about WPSD when AmateurLogic ran a segment in January on this new offering. I started using it shortly after. Though it was early on in the project, WPSD was labeled “not for the faint of heart” by the author.

It was really rough around the edges. I had to debug scripts in order for updates to run successfully. The dashboard would show the modem in “TX D-STAR” when only P25 was enabled. There were issues with the configuration file manual editor too.

Regardless, development is very active. WPSD has become much more stable and now considered the Pi-Star replacement. Alot has changed in the time I’ve been using WPSD and presume things will continue to evolve.

One such change, there was an option for installing WPSD on top of an existing Pi-Star installation. That option is no longer available or supported. The distribution must be flashed directly to an SD card (flash memory), exactly like Pi-Star.

I always recommend using a new card or different SD card from the current, existing installation until everything is working as the user expects. Having the old (original) card available allows switching back easily in case of problems or need to reference something from the previous installation.

Pi-Star with Nextion display (ailunce.com)

A recent blog post by the author called out people who claim WPSD is an “overlay.” At one point, it could have been installed on top of an existing Pi-Star installation. WPSD is not an overlay. It is its own software distribution.

WPSD works with most Raspberry Pi offerings (Zero, Zero 2, 2, 3, 4, …) including the Orange Pi and Nano Pi Neo variants. The Raspberry Pi Zero W 1.1 is not really recommended for use but it will work. The Zero W 2 is recommended instead. A Zero W 1.1 needs extra configuration steps after flashing the SD card. These include: creating a wpa_supplicant.conf and placing it in the /boot partition. Waiting at least 30 minutes for the image to boot and configure itself before accessing the dashboard. Steps are detailed in the link above.

While using WPSD with my Pi Zero W 1.1 it is quite a bit quicker, taking about a minute to save changes on the configuration page of the dashboard. Compared to the Pi-Star which took two to three minutes to save changes. Pi Zero W 2s are still very hard to find. If you can find one, a male header strip still needs to be soldered to the GPIO. Pre-soldered ones are nonexistent.

Not only is WPSD on a supported operating system (bullseye, Debian 11) but there are a TON of enhancements and updates over Pi-Star. Though the visual layout has changed, it’s intuitive enough for any existing Pi-Star user. Changes I noted right away were the addition of M17 support (though I don’t have any capable devices) and Nextion support built-in. Nextions are displays and/or touchscreens that can be attached to the modem or added through a TTL serial converter, such as those based on the CP2102 chipset. Adding Nextion support to the original Pi-Star was a terrible experience using hacky scripts that had to be run a couple times before the drivers and software could be usable.

Non-exhaustive list of enhancements: full APRSGateway support. DGId support. DMR Roaming Beacon Support for repeaters. Caller details include name and location. Talkgroup names are populated. On the fly changes of talkgroups/rooms/reflectors/networks including ability to pause networks for attending nets or quieting a busy mode. Live Caller mode which is a browser based (virtual) version of a Nextion display. Ability to disable cron (scheduled) updates. Updated dashboard including wider, bigger, updated fonts, user configurable options including CSS styling and fonts. Full dashboard display or Simple View with only RF and gateway activity. Configurable number of last heard stations. Configuration/Profile Manager, similar to OpenSpot, where the user can save multiple versions of a setup and restore them based on use.

A Profile Manager feature was added to WPSD, which did not exist in Pi-Star but exists in the OpenSpot devices. This allows the user to save device settings into a profile to be recalled later. These could be travelling profiles, or ones specific to a mode, network, or configuration for a net. Initial implementation of this feature did not backup saved profiles when using the Backup/Restore feature. Only the current active profile would be backed up or restored. Now, within the last two months, Backup/Restore saves ALL device profiles in the backup archive.

That is an example of the constantly evolving nature of this new WPSD distribution. Updates happen quite frequently. WPSD was updated nearly daily for a long time. Updates still happen quite frequently but at the pace of about once a week, maybe more.

Speaking of backups, it’s not recommended to use migrated configuration files or backups from Pi-Star, due to differences. If Pi-Star files are used with WPSD and there are issues, the user will be required to begin configuration from scratch.

One change I do not particularly care for is the requirement to use DMRGateway. In Pi-Star, I used Direct Mode which is the selection of a single DMR Master. For example: select BM_3104_United_States for Brandmeister and TGIF_Network for TGIF as the DMR Master. I liked this for two reasons: this functionality is similar to how a repeater would operate and it simplifies codeplug programming for talkgroups with the same TG ID across different networks. Ohio Statewide is 3139 on multiple networks meaning I only had to setup Ohio Statewide once. Though it seemed most users did use DMRGateway in Pi-Star.

DMRGateway supports simultaneous connections to six networks. With all those network connections there must be a way to differentiate which network is to receive a transmission. That way is through “prefixes,” a single number prepended to the talkgroup number. DMRGateway doesn’t appear to use a prefix for Brandmeister, 3139 would remain 3139. TGIF talkgroups are prefixed with a 5. 3139 would become 53139. HBLink prefix is 8. My HBLink would be 831983 instead of 31983.

If you’ve programmed a codeplug for a DMR radio, it’s not as easy as just making a new contact with the prefix. Adding the contact to an RX group, creating new channels, and reorganizing or creating new zones are all needed. Maybe I’ll purge the ‘nice to haves’ in my codeplug as I typically only use a handful of talkgroups or just make a new simplified codeplug for use with WPSD.

Changes have been made to the scripts and tools. Commands rpi-rw and rpi-ro have been removed. These were used to switch between a read/write file system and a read-only file system. There has been debate whether a read only file system corrupts any less or shortens the lifespan of the SD card when left in read/write mode. Pi-Star was constantly changing from read only to read/write during settings changes, updates, and hostfile update cycles. Mine seemed as though it could never successfully change from read/write back to read only after an update. Eliminating those scripts just ‘fixed’ those resource busy messages.

Pi-Star scripts that began with pistar- have all been removed and replaced with a smaller set of wpsd- scripts. It was great because all WPSD updates were taken care of by going to Admin -> Update. Though, a recent change has removed operating system updates from that feature. Admin Update only updates WPSD currently (probably due to those lengthy Raspbian kernel updates). To update the operating system, SSH to WPSD or go Admin -> Advanced -> Tools -> SSH Access. After logging in (same credentials used to login to the Admin or Configuration dashboards), at the command line, enter (capitalization is important):

sudo UP_OS=1 wpsd-update

As with Pi-Star, if an update fails or installation becomes borked, re-flashing the SD card with the latest available image will bring the device to a known working state. Remember to save a new backup before updating! WPSD images are updated more frequently than Pi-Star. Updates released since the image was published won’t take quite as long to apply.

There is a lot to read, including some edge features that have been removed, on the WPSD page (linked above). Comparing WPSD to Pi-Star (‘this used to work on Pi-Star,’ ‘when I revert back to Pi-Star this thing works,’ etc.) is verboten when asking for support. The main page on W0CHP’s site is a blog detailing direction and state of the project as well as reasons for changes. I recommend Pi-Star users update to W0CHP-PiStar-Dash – if nothing else, for the supported operating system and OS package updates though there are many improvements and welcome features.

Thanks for reading and 73… de Jeff – K8JTK

Amateur Radio, ARRL Ohio Section, Ohio Section Journal

Ohio Section Journal – The Technical Coordinator – August 2022 edition

August 28, 2022 Jeffrey Kopcak

Once my article is published in the Journal, I will also make it available on my site with a link to the published edition.

Go to www.arrl.org and click the Login button.
Login
When logged in successfully, it will say “Hello <Name>” in place of the Login button where <Name> is your name. Click your Name. This will take you to the “My Account” page.
On the left hand side, under the “Communication” heading (second from the bottom), click Opt In/Out
To the right of the “Opt In/Out” heading, click Edit
Check the box next to “Division and Section News.” If it is already checked, you are already receiving the Ohio Section Journal.
Click Save
There should now be a green check mark next to “Division and Section News.” You’re all set!

Now without further ado…

Read the full edition at:

THE TECHNICAL COORDINATOR
Jeff Kopcak – TC
k8jtk@arrl.net

Hey gang,

When it comes to digital communications, especially in the Ohio Section, efforts have been focused on DMR. Repeaters are pricier than other digital modes. An abundance of end-user devices available from a variety of vendors, at fairly inexpensive prices, is a winner for users. DMR, being a commercial standard, was adopted to ham radio. Those that have not spent time to understand how a codeplug works and how to modify them ‘are just a bunch of appliance operators’ is a common argument. To link the majority of Ohio’s DMR repeaters, a network had to be chosen. Ohio standardized on Brandmeister.

What is BrandMeister? “BrandMaster/BrandMeister is an operating software for Master servers participating in a worldwide infrastructure network of amateur radio digital voice systems.” Stating that amateurs can and do use it for D-STAR and Wires-X, its main focus and selling points are related to DMR linking.

In the early days of DMR in ham radio, networks were setup identical to their commercial system counterparts. Repeaters had certain talk groups on specific time slots. Limited to 16 talk groups because that’s how many channels were available on the radio’s selector knob. Owners had little to no options for customizing talkgroup offerings. For example, if you were in eastern Ohio, a repeater might have Indiana statewide whether you wanted it or not. There were no such things as hotspots, at least as hams know and understand them. Like most new things, early adaptors did this for fun and no one really knew if DMR would take off and be accepted by the masses.

Three things helped DMR take off in ham radio: cheap radios, hotspots, and Brandmeister. Brandmeister turned commercially implemented DMR networks on their heads. Made it more like ham radio. A repeater owner could put any talkgroup on any time slot. Any user could make private calls to other users on any timeslot. Even make up a talkgroup number, hit transmit, and if another user was on that same talkgroup number, communication happened automatically. Later, simultaneous data messages and APRS were implemented. Being able to use ham developed gear, like the DV4mini and OpenSpot devices, was a huge draw. Hams familiar with commercial implementations of DMR were questioning ‘how could Brandmeister pull this off without causing chaos in the ham radio streets?’ Especially the ‘pick your own talkgroup number.’

With the explosion in popularity came use and abuse. Brandmeister had to start making decisions and decided to follow the strictest definitions of standards. You can still make up your own talkgroup but it is generally frowned upon. DV4Mini sticks were banned due to poor software – this was reversed after G4KLX wrote compatible software. There was a hissy fit Brandmeister threw about using DMR IDs starting with 1. Everybody and their mother, brother, and daughter requested talkgroups. No more 5-digit talkgroup numbers are assigned. Bridging to other digital modes, networks, and analog systems is verboten, explicitly forbidden on world-wide, regionals, and statewide talkgroups. Brandmeister considers 3, 4, and 5-digit talkgroup IDs under their control, as defined by the MCC numbering standard. 6-digit repeater IDs or 7-digit user IDs, the assigned owner can do whatever they want as Brandmeister sees themselves as “guests” for those IDs. There are more do’s and don’ts in the BM USA wiki.

For a good long time, development and, I would argue, interest by the development team was stagnant. There were long standing issues with many parts of the system, including the online audio web portal, Hoseline. For years it would not work correctly, had long audio delays or no audio at all, or the URL would simply be unavailable. Around June 2021, a new and much improved Hoseline appeared. Featuring a new and modern interface with the ability to monitor multiple talkgroups at a time.

Improvements in the name of security were made later the same year. Each Brandmeister hotspot user needed to generate a “hotspot password” for each DMR ID. This change impacted every Brandmeister user. I was contacted well into 2022 about users whom were unaware of this change.

Not-so-well-known changes affected some misconfigured hotspots and users of DVSwitch and MMDVM bridging. Master servers started checking parameters such as RXFrequency and TXFrequency in MMDVM. If the device was a hotspot, Brandmeister logic said if those two fields are not the same value, the device it must not be a hotspot because hotspots are simplex. If a hotspot (or DVSwitch/MMDVM Bridge) had RX Frequency not equal to TX Frequency, the device would be blocked from transmitting because it was deemed misconfigured. In order to work, they both had to be the same. Also, if either parameter was 0 – as in no RF output, such as an Internet link – also no work-y.

It’s their network and I really want to like them. Their decisions are making it hard for sysadmins to continue using Brandmeister. Communication regarding nearly all back-end changes have been poor to nonexistent. Changes affecting all users are publicized, even though a good percentage hit me up months later saying ‘all of a sudden my hotspot doesn’t work anymore.’ Sure, some changes might only “affect a small number of users,” post something in the groups.io. Instead admins are left to figure out, on their own, why the Brandmeister link is not functioning without being aware of changes on their end. Something about not peeving off your users, which they seem to be doing a lot lately. I get that they’ve had to make hard decisions and many policies are a result of the users whom abuse the system. Brandmeister probably received pressure from other network and talkgroup owners who want to quash analog cross linking. When the Brandmeister network was originally a ‘do-anything network,’ it’s not easy when they start pulling-back on those abilities.

August 19th, a major code upgrade was rolled out which implemented additional changes paving the way for better dashboard integrations, APIs, and hopefully more new features. If you setup your hotspots or applications with a Brandmeister API key prior to August 19, 2022, new keys are required. I was able to generate Brandmeister API v2 keys for Pi-Star: 4.1.6 / Dashboard: 20220819 and OpenSpot3 with firmware v62.

I was not able to save the API v2 key on an original OpenSpot (1) with the latest firmware available (0142). I was seeing the error message “Couldn’t save API key (Bad Request).” According to the support forums, they won’t be getting support for v2 either. New keys are supported on the 2, 3, and 4 OpenSpot models. If you had previously generated a v1 API key, it will continue to work for as long as Brandmeister allows.

I do not know if previous versions of Pi-STAR have been updated to support v2 API keys. To update a Pi-STAR to the latest revision, backup the existing configuration, download v4.1.4 on the Pi-Star site, flash to a new or the existing SD card. When configured, run update/upgrade and repeat, from the Configuration -> Expert option, until there are no more updates for both tasks. Pi-STAR cannot be upgraded version-to-version through the updater/upgrader.

Go to Configuration -> Expert -> under Full Edit, BM API. If you have an apikey entered these need to be updated, specifically apikeys that are 128-characters. It will look something like:

MWaztB3EcHWBEW@D$2gb89Y2kvvE4leSr.33Gey74d0IYVSKU58YGMSFmPHD.Q1fECUkIcj7E4leSr.33Getkjshdf987ywe2irligr908SFIdlsfkj08934sasdlveg

The 128-character API keys will continue to work for an undetermined amount of time. Follow the Brandmeister blog post to generate updated API keys. If you don’t have an apikey entered and don’t want one, you don’t need to do anything.

What alternatives are there to Brandmeister? Networks such as DMR+ and FreeDMR are popular in Europe/UK. HBLink reflectors are available but only offer a few select talkgroups. TGIF is a smaller DMR network implementation. They do not have many restrictions on device configuration. Though TGIF does have an “Ohio” talkgroup, it’s not the same everyone knows and loves on Brandmeister. As an admin, TGIF is much easier to work with. Running a linking system that has links to Brandmeister, TGIF, and HBLink, users don’t use alternative options, even though they complain about Brandmeister. Brandmeister is what they know and love. They won’t venture out to use other, more stable options, therefore remaining appliance operators.

Thanks for reading and 73… de Jeff – K8JTK

Amateur Radio, ARRL Ohio Section, Ohio Section Journal

Ohio Section Journal – The Technical Coordinator – July 2022 edition

July 31, 2022 Jeffrey Kopcak

Once my article is published in the Journal, I will also make it available on my site with a link to the published edition.

Go to www.arrl.org and click the Login button.
Login
When logged in successfully, it will say “Hello <Name>” in place of the Login button where <Name> is your name. Click your Name. This will take you to the “My Account” page.
On the left hand side, under the “Communication” heading (second from the bottom), click Opt In/Out
To the right of the “Opt In/Out” heading, click Edit
Check the box next to “Division and Section News.” If it is already checked, you are already receiving the Ohio Section Journal.
Click Save
There should now be a green check mark next to “Division and Section News.” You’re all set!

Now without further ado…

Read the full edition at:

THE TECHNICAL COORDINATOR
Jeff Kopcak – TC
k8jtk@arrl.net

Hey gang,

Seven operators activated Special Event Station W8B on July 16, 2022. Operating team consisted of: Technical Specialist Bob – K8MD – Bird employee and mastermind in planning the event, K8FH – Fred, K8TV – Ken, KC8NZJ – Mat, NF8O – Dave, KE8BKI – Stephanie, and K8JTK. This Special Event commemorated 80 years of Bird Electronic Corporation and 70 years of the Model 43 Wattmeter.

In 1940, J. Raymond Bird developed a way to quickly and accurately measure forward and reflected power in coax transmission lines. In April 1942, Bird Engineering Company was founded in Cleveland, Ohio. According to an old sign on their website, the original location was on E. 38th street. Later, the company renamed to Bird Electronics Corporation. After securing important contracts in the late 1950’s, they located to their current facility in Solon, Ohio. Bird was instrumental in the Mercury and Apollo space programs during the 1960’s, supplying radio-tracking equipment and loads for equipment testing. Today, Bird manufactures and packages test equipment, signal boosters, analyzers, and recording equipment.

70 years of the Bird 43 Wattmeter (Bird)

In 1953, the Bird 43 RF Wattmeter was introduced and quickly became the industry-standard tool for RF power measurement. A staple in many ham shacks, the Bird 43 is popular in commercial and broadcast industries as well. During the 1970’s, Bird provided critical and affordable test equipment to ham radio operators during emergencies which helped Bird become a household name. The 43 is popular because it can measure a wide range of frequencies, 450 kHz to 2.7 GHz between 100 mW to 10 kW, using plug-in elements. These elements are commonly referred to as “slugs.” The meter is an insertion-type, meaning placed in-line of the transmission line, measuring forward and reflected power.

Started out as a dreary, rainy morning. When I left my QTH, the sun was starting to make an appearance. Rain held off for us to operate 7 hours before another round was on its way. Three portable stations were operational. Two HF by K8MD and K8FH, and one VHF/UHF by K8TV. The HF antennas were portable turnstile dipoles with a fabricated or Spiderbeam center mast. These are quickly deployable and go up in about 20 minutes. The VHF/UHF was a commercial antenna on a fabricated mast that rose just above one of the unloading docks.

Plan was to be on the air by 1000 local. Setup went quick and W8B was operational around 0900 testing the equipment with a few initial contacts. We operated from the outdoor employee patio of Bird. Operators were treated to a tour of the factory by K8MD. It was nothing short of impressive. In order to test manufactured products, there are high power broadcast transmitters for dummy load testing and plenty of test equipment that any ham would love to have in their shack. Most products, including the 43, are made, tested, and shipped from the Solon, Ohio location.

K8MD, Katie Wright, Dana Svilar, Terry Grant, and NF8O

After the tour, we met executives Katie Wright – Director of Strategic Development, Dana Svilar – Manager of Marketing Communications, and CEO Terry Grant. They were interested to see the setup and how the event was progressing. We explained and demonstrated the digital station. Sideband contacts were made and they heard from hams that own a Bird 43.

The bands weren’t the best to start out. On 40m, we’re logging contacts. Then, like a light-switch, there was nothing, including on FT8. Katie was trying to coordinate a contact with N1KSC, Kennedy Space Center Amateur Radio Club, with some close friends of hers. For a good while, they were hearing us 59 but we did not copy them at all. Right about noon, K8MD finally established contact. There was still plenty of QSB but he got them in the log. Katie even got on the radio to say a few words during the exchange!

K8TV operated the VHF/UHF station. He was making contacts on repeaters in Lorain (close to 40 miles at our 1100 ft elevation) and surrounding counties, including making simplex contacts. K8FH operated the CW station. NF8O made quite a number of sideband contacts in the afternoon despite the up-and-down band conditions. K8MD, KC8NZJ, and myself operated FT8 throughout the day.

Bird graciously bought us lunch from a local pizzeria and we received swag for coming out and playing radio. We operated until 1600, a little past that on the digital station, and started to strike the equipment. We were on the road home around 1700.

164 contacts were made: CW: 5, SSB: 37, FM: 26, FT8: 96. Thanks to K8MD who planned the event. Bird Electronic Corporation for allowing us to operate from their facility and their hospitality. If you made contact with W8B, you will receive a QSL card, designed by Dana, as a thank you.

Striking the last antenna for W8B: KC8NZJ, K8TV, KE8BKI, K8FH, and NF8O

One of the many things on my ham radio “do-more-with” list is AREDN mesh. I have a MikroTik RouterBOARD hAP ac lite node I setup some time ago. I haven’t done much with it due to not having any real way to get a high-profile node and no other nodes are around me. It’s been running in the shack with a tunnel to W8ERW & Sandusky ARES. I haven’t advanced much on “now what?” after the initial exercise of flashing a node with AREDN’s firmware.

If you have an AREDN node and haven’t updated in the last few months, start planning an upgrade. AREDN implemented many projects which have made considerable improvements to the firmware. The original Broadband-Hamnet was written in Perl and AREDN continued to build on and maintain Perl code. A conversion from Perl to the Lua programming language has been completed. This conversion recovered a lot of memory by removing large Perl libraries. Nodes will now run code optimized for embedded devices. Memory saved by the conversion means the tunnel package and iperf3 (speed testing) are now bundled with the base firmware. Previously, both had to be installed manually after each upgrade.

Upgrades and selecting the correct firmware should be much easier too. Nightly builds are available for testing new features or tweaks in the firmware. Though, “nightlies” as they are called, are pre-alpha releases. According to the project, theirs are pretty stable. This doesn’t mean they should be installed on production nodes in hard-to-reach places in case something goes sideways.

Link Quality Management has been added to help optimize networks and drop links that cause network problems. Nodes with poor SNR, too far away, or prone to many retransmissions can be dropped automatically. These cause poor performance for nodes without those issues. An example: a high-profile node has to account for all connected nodes. If a node 40 miles away from its location its connected, it must wait for acknowledgments from all connected nodes. Should that node 40 miles away not be able to receive messages or messages can’t be delivered back to the high-profile node, this degrades speed and performance significantly. The high-profile node must wait for responses and possibly keep retransmitting the same message to that node until a response is received. LQM will drop nodes that do not meet quality criteria. This feature is turned off by default, unless it was configured previously.

These updates, network design basics, and demo of the next generation user interface are covered in a recent LAXNORTHEAST meeting. That meeting is available on YouTube featuring AREDN representative Orv – W6BI. He deployed the mesh backbone in Ventura and western Los Angeles Counties. His presentation isn’t introductory but is beneficial for those who have setup and maintain a node.

A radio that covers ALL ham radio voice digital modes? Reality or vaporware? Projects, like the DV4 Mobile, have been vaporware. Taking a swing at the market this time is the Connect Systems CS800D PLUS. It claims: to store 520,000 contacts and 64,000 channels, have the ability to do DMR, FUSION, DSTAR, P25 and NXDN, make its own code plug on the fly, and many more features yet to come. Consider me intrigued. OK, it doesn’t do most of this out-of-the-box. Essentially the CS800D PLUS is the CS800D today, a DMR and analog dual-band mobile radio. Features will be added ‘without the manufacture’s cooperation’ and ‘firmware will be done by the Amateur community.’ Not really sure how that is going to work since the existing firmware isn’t open sourced, documented, or have documented hooks/APIs. Additionally, the “all digital modes” comes via a “co-processor or your laptop to allow you to add digital modes not currently in the radio.”

I have the CS800D but purchased one of these anyway to see if this actually comes to fruition, especially the ‘all the digital modes’ part. If not, it or my 800D will appear on the used market! I envision this radio will utilize a NW Digital Radio DV3000 or DVMEGA DVstick on a Raspberry Pi or computer using a serial connection between the radio and computing device. This would provide off-radio encoding/decoding of digital modulation and analog frames. No working proof of concepts or documented working setups have been posted as of this writing. Posted documents mostly show how to convert codeplugs between the CS800D and CS800D PLUS. Firmware for the CS800D PLUS is not backwards comparable with a CS800D, according to Connect Systems. The CPS will work with both radios but the firmware is not compatible due to CPU and memory differences.

Flying under my radar was the release of the SharkRF openSPOT 4. After reading up, it’s another incremental release. What’s new in the 4? Improved battery life (up to 30 hours), multi-core CPU, new WiFi module, and split into two offerings: openSPOT 4 and openSPOT 4 Pro. That’s it, near as I can tell. It’s probably due to chip shortages, but the openSPOT 4 is available now where as the openSPOT 4 Pro is due to ship again August 20th.

What’s the difference between the 4 and 4 Pro? Hardware cross mode capability and price. The openSPOT 4 rings in a € 249.00 ($254.14 USD) and the 4 PRO at € 319.00 ($325.59 USD, both conversions as of this writing). First introduced in the openSPOT 3, SharkRF hotspots are the only ones with the ability to cross mode D-STAR with DMR, C4FM, and NXDN networks. The 4 does not have the capability to cross mode D-STAR with other networks, the 4 Pro does have this capability. As with other openSPOT releases, the release of the OS4 end-of-life’s the previous model. The openSPOT 3 will probably get some firmware updates here-and-there but don’t expect many more based on past experience. I liked the openSPOT 3 for what it was. The 4’s are another pass for me because this release that doesn’t offer much more features than my openSPOT 3.

Nearly as soon as the OSJ went to publish last month, the wording about DroidStar no longer being available for iOS was removed. It appears the issues of concern were resolved. DroidStar is back in TestFlight and I heard from iOS users that it was working for them again.

Thanks for reading and 73… de Jeff – K8JTK

Amateur Radio, ARRL Ohio Section, Ohio Section Journal

Ohio Section Journal – The Technical Coordinator – December 2020 edition

December 27, 2020 Jeffrey Kopcak

One of the responsibilities of the Technical Coordinator in the Ohio Section is to submit something for the Section Journal. The Section Journal covers Amateur Radio related things happening in and around the ARRL Ohio Section. It is published by the Section Manager Scott – N8SY and articles are submitted by cabinet members.

Once my article is published in the Journal, I will also make it available on my site with a link to the published edition.

You can receive the Journal and other Ohio Section news by joining the mailing list Scott has setup. You do not need to be a member of the ARRL, Ohio Section, or even a ham to join the mailing list. Please sign up!

If you are an ARRL member and reside in the Ohio Section, update your mailing preferences to receive Ohio Section news in your inbox. Those residing outside the section will need to use the mailing list link above.
Updating your ARRL profile will deliver news from the section where you reside (if the leadership chooses to use this method).
Go to www.arrl.org and logon.
Click Edit your Profile.
You will be taken to the Edit Your Profile page. On the first tab Edit Info, verify your Email address is correct.
Click the Edit Email Subscriptions tab.
Check the News and information from your Division Director and Section Manager box.
Click Save.

Now without further ado…

Read the full edition at:

THE TECHNICAL COORDINATOR
Jeff Kopcak – TC
k8jtk@arrl.net

Hey gang,

One of the things I’ve been working on during my time at home is the Digital VoIP Multimode Interlink System (DVMIS), also called the K8JTK Hub. About a year-and-a-half ago, I came up with this bright idea to setup a system that would interlink many different ham radio VoIP (Voice over IP) modes for interoperability and experimentation. Through trials and tribulations, it’s experiencing some success, caught the interest of some nets, and a podcast.

Many digital modes sit on their own island and are restricted from crossing over to the analog world or to other digital networks. Some may say this is for quality-of-service but does nothing for interoperability or the ability to link and communicate across different systems. Original D-STAR DPLUS reflectors banned analog connections. My Hub supports ham radio experimentation by allowing hams to discover ways of utilizing a system that can link different modes. Utilization of ham radio spectrum is a priority through the use of hot spots and repeaters. Connections without RF are not a priority. Hamshack Hotline was provisioned because of use in Emergency Operation Centers. Many times, I’ve been asked about stations that don’t have access to RF hotspots or radios. They still have options including the Echolink app on Android and iOS devices, Hamshack Hotline phone which can be purchased for $30 (I’ve heard deals as low as $5 for a compatible phone), or the DudeStar app. The servers are hosted in a Chicago data center to provide resiliency against hardware, power, weather, and Internet outages, but still be fairly inexpensive.

All this is possible through integration of open-sourced packages including: AllStarLink which is a world wide network of Amateur Radio repeaters, remote base stations and hot spots accessible to each other via the Internet and/or private IP networks. Built on an open-sourced PBX system called Asterisk, Jim Dixon – WB6NIL (SK) built the apt_rpt module emulating functionality of a repeater controller. Jonathan – G4KLX authored programs that support D-Star, DMR, System Fusion, P25, and NXDN which are utilized in MMDVM devices like most hotspots. DVSwitch is a suite of applications for provisioning and operating Amateur Radio digital voice networks maintained by Steve – N4IRS and Mike – N4IRR. The DVSwitch Mobile app was designed to operate analog and digital modes utilizing an Android phone in conjunction with server applications running on a Linux server or Raspberry Pi. The ASL to DMR documentation (groups.io account required) got me started experimenting with these applications and ultimately lead to the build out of the system. XLXD is a multiprotocol reflector server for D-STAR by Jean-Luc – LX3JL & Luc – LX1IQ. Skip – WB6YMH & others maintain thebridge, an Echolink compatible conference bridge.

Originally, hosted on 2 servers, after troubleshooting some issues, it was more reliable to host everything across 3 VPSes (Virtual Private Servers) running Debian Linux. Parts of the system can go down and individual parts will continue to function. Aside from the VPSes, a Raspberry Pi with a Northwest Digital Radio DV3000 provides D-STAR audio transcoding to the system. Wires-X is available through the use of additional remote hardware. Wires-X is proprietary to Yaesu radios and repeaters. Wires-X is not available through open-source implementations such as YSFReflector or MMDVM without additional devices. I’d like to get the DV3000s in a reliable data center but doing so is prohibitively expensive. AllStar Link is the “Hub” that provides connectivity and linking control between all networks.

Putting all of this together provides a system with access to ten different networks and eight different modes! Any user on one network can communicate with users on other networks. Access is available through these nodes and connections:

AllStar Link: 50394
DMR: Brandmeister Talk Group 3172783
DMR: TGIF TG 31983
D-STAR: XLX983A (A = Analog Bridge. Pi-STAR = DCS983A, OpenSpot = XLX983A)
Echolink: *DVMIS* conference 600008
Hamshack Hotline: 94026 (*99 – TX, # – RX)
NXDN: TG 31983
P25: TG 31983
YSF: K8JTK-Hub 31983
Wires-X: K8JTK-ROOM 40680 (available upon request)

Dashboards:

Building this system has not been without problems. Luckily, I’m able to work around known issues. In order from least frustrating to most frustrating: all programs use IP addresses and ports to communicate, keeping all of that straight was a challenge initially. Using IPs allows for great flexibility utilizing network links such as private networks and VPNs. Dependency hell as a result of additions and changes to programs made a constant deployment from one day to the next an issue. XLXD changed its implementation to include YSF which then conflicted with the port used for the YSFReflector. Changing the YSFReflector port required propagation to Pi-STAR host files and OpenSpot DNS. DVSwitch has been rewritten two times since I’ve implemented it and they’ve released another round of changes. Data center provider choices resulted in issues with packet loss. Moving the servers to another provider yielded much better results. The previous provider finally acknowledged and supposedly resolved the issue a year after it was reported, and after I moved.

Use of physical hardware for D-STAR. OP25 software codec can transcode D-STAR but “you won’t be happy” to quote a post in the forums. D-STAR looooves IP addresses. DNS is great for switching IP addresses easily (like when moving data centers or spinning up different servers). However, D-STAR relies only on IP addresses. As a result, reflector IP changes take about a day to propagate to online hotspots/repeaters. Using AMBEServer with the DV3000 on a remote device resulted in very choppy audio. After some time, had the idea to move Audio Bridge to the same device as the DV3000 then use IP routing to send audio to and from AB. Worked great.

In order to compile AllStar Link from source takes a lot of time to get right and includes A LOT of dependencies. Finally, one that drove me crazy was the chan_echolink module for AllStar which provides Echolink connectivity natively to AllStar. When load testing with many connections, something was making stations sound as though they were transmitting underwater. After observing patterns, determined it was audio originating on the Hub being sent out to Echolink connections. Incoming audio from Echolink stations was OK and audio sent to all other nodes was also good. The problem seemed intermittent until I consulted groups.io and further determined chan_echolink has audio quality problems when more than three EL stations are connected simultaneously. Not ideal for a hub. Best workaround was to implement an Echolink Conference server. Then only allow chan_echolink connection to that conference server. Echolink users would then connect to the same conference server. This issue took a lot of time and a lot of hair pulling but implemented a workable solution that offers a quality system. Root cause is still unknown as an AllStar developer hadn’t chimed-in with any suggestions or possible reasons.

The DVMIS hub hosts a couple nets. Tuesday nights at 9pm eastern, since about the first-time stay-at-home orders were put in place, is the Amateur Logic Sound Check net. The net encourages checkins to utilize as many modes as possible during the net to test equipment. If you haven’t seen the Amateur Logic podcast, it has been going for over 15 years and they release two shows monthly. The regular podcast has segments about technology and Ham Radio. “Ham College” is an educational show for those wanting to get licensed or upgrade. The guys asked me to put together a segment for the show. My segment can be found in episode 149. A huge thanks goes out to the ALTV crew and everyone checking into the net which helped me identify and resolve system issues. They’ve also been great in keeping up with all the changes over the last 9 months. At the end of December, I’ve been testing with the West Chester Amateur Radio Association – WC8VOA to add digital modes to their net on Monday evenings at 8pm.

Around the time my segment was airing on ALTV, Brandmeister did not approve of the linking method and linking to other networks. Brandmeister uses the MCC standard and they manage talkgroup IDs consisting of 3, 4, or 5 digits. 6- or 7-digit IDs are repeater IDs and user IDs respectively, and can be used however the assigned owner would like. The BM TG in the ALTV episode is now 3172783 and is correct in the listing above.

The Hub is open for all to use in testing equipment, software, or linking up with friends. I keep status updates listed on the page linked at the beginning of this article. For this and any linked system, please remember a couple practices. When keying your radio, pause a second or two to allow all links to rise, otherwise the first couple words maybe lost. Pause a minimum 3-5 seconds between transmissions to give time for links to reset and other stations to break in. Do not “tailgate.” Enjoy and join the nets to get a feel for the Interlink System’s capabilities.

Slow Scan TV has become big over the last couple years due to ARISS (Amateur Radio on the International Space Station) events. One of the longer events will have begun before OSJ publication: starting December 24 at 16:40 UTC and continue through December 31 ending at 18:15 UTC. Dates are subject to change due to ISS operational adjustments. Images will be downlinked at 145.800 MHz +/- 3 KHz for Doppler shift and the expected SSTV mode of operation is PD 120. Radio enthusiasts participating in the event can post images they receive at the ARISS SSTV Gallery at https://www.spaceflightsoftware.com/ARISS_SSTV/. After your image is posted at the gallery, you can acquire a special award by linking to https://ariss.pzk.org.pl/sstv/ and follow directions for submitting a digital copy of your received image. Even an HT can receive images from the space station. If you would like to receive images using MMSSTV on Windows, head over to my tutorial.

Congratulations to Scott Yonally – N8SY who won his election as Great Lakes Division Vice Director! Since he cannot hold more than one elected position at a time, he will be stepping down from his current Section Manager position when he assumes the Vice Director position on Jan 1. I wish him nothing but the best in his new role as he has done a lot for the Ohio Section during his tenure. We will then welcome Tom Sly – WB8LCD who will be appointed the new Section Manager for Ohio!

Thanks for reading. Happy holidays, Merry Christmas, and Happy New Year!
73… de Jeff – K8JTK

Amateur Radio, ARRL Ohio Section, Ohio Section Journal

Ohio Section Journal – The Technical Coordinator – June 2020 edition

June 28, 2020 Jeffrey Kopcak

One of the responsibilities of the Technical Coordinator in the Ohio Section is to submit something for the Section Journal. The Section Journal covers Amateur Radio related things happening in and around the ARRL Ohio Section. It is published by the Section Manager Scott – N8SY and articles are submitted by cabinet members.

Once my article is published in the Journal, I will also make it available on my site with a link to the published edition.

Now without further ado…

Read the full edition at:

THE TECHNICAL COORDINATOR
Jeff Kopcak – TC
k8jtk@arrl.net

Hey gang,

As Technical Coordinator for the Ohio Section, I oversee the section’s group of Technical Specialists. The Specialists and I are here to promote technical advances and the experimentation side of the hobby. We encourage amateurs in the section to share their technical achievements with others in QST, at club meetings, in club newsletters, hamfests, and conventions. We’re available to assist program committees in finding or providing suitable programs for local club meetings, ARRL hamfests, and conventions in the section. When called upon, serve as advisors in issues of RFI and work with ARRL officials and appointees for technical advice.

The Technical Specialists really make all this happen. In the Ohio Section, there are about 15 qualified and competent Specialists willing to help. They meet the obligation of advancing the radio art bestowed to us by the FCC. The TSes support the section in two main areas of responsibility: Radio Frequency Interference and technical information. EMI/RFI includes harmful interference that seriously degrades, obstructs, or repeatedly interrupts a radio communication service such as ham radio or public service agencies. RFI sources range from bad power insulators, industrial control systems, other transmitters or poorly made transmitters, personal devices like computers, monitors, printers, game consoles, to grow lights and poorly made transformers – including one’s hams brag about getting from China for a few dollars. I die a little inside when I hear this. Our Technical Specialists can help track down interference or locate bozo stations. Technical information is a wide-ranging category including everything from antennas to Zumspots.

How can we help? The knowledge and abilities of YOUR Technical Specialists are really quite impressive. Here are some examples:

Antennas (fixed, portable, and emergency operation type) and feedlines
Antenna systems such as towers, guying, coax, and baluns
RF and tower safety
Grounding
Propagation
Electronics and circuits
Tube technology, aka boat anchors
Digital modes – including D-STAR, DMR, Fusion, P25, APRS, IGates, packet, MT63, FT8/4, Olivia, PSK, and using programs like Fldigi
NBEMS – Narrow Band Emergency Messaging System
Computers, Windows and Linux, Raspberry Pi
Embedded devices
Networking: IP networks, AMPRNet, routers, firewalls, security, mesh, and microwave
Repeater controllers and high-profile systems
Internet and VoIP linking systems – Echolink, AllStar, HamVoIP, DVSwitch, and PBX/Asterisk
RFI detection from power lines and consumer devices including working with governmental agencies to track down interference
Professional certifications such as Motorola Certified Technicians, Certified Journeyman Electronics Technician, General Radiotelephone Operator License (GROL), and Society of Broadcast Engineers (SBE) affiliations

This impressive list of qualifications is an available resource to all in the Ohio Section. Looking for help in one or more of these areas? Need a program for your club? How about a technical talk or forum at your hamfest? Assistance or direction on a project? Feel free to contact myself. My contact info is near my picture and on the arrl-ohio.org website. I’ll assist getting you in touch with an appropriate Technical Specialist. One of the Specialists might hear a plea for help and reach out to you as well.

Over the last month, we gained 3 new Technical Specialists! I would like to welcome Nick – N1TVI who is a Certified Journeyman Electronics Technician and brings experience in commercial radio systems. He is Trustee for the Northern Ohio Digital (N8NOD) repeaters in the northern Ohio area. Other experience includes repeater systems, power, grounding, and antenna systems. Jason – N8EI brings us his experience in repeater building and maintenance for the W8WKY machines in Doylestown and others, supports SHARES organizations, voice and data digital modes, and IP technology. Last, but not least, John – N8CD is co-builder of many multimode repeaters and an AllStar linked repeater system. Both John and Jason maintain a resilient network of 5.8 GHz microwave and Internet links that connect repeaters they and others maintain. They put a lot of work into their network implementation and use AMPRNet (network 44) IP addresses. Welcome to our newest Technical Specialists! Contact them or myself should any of those topics be of interest to your club or hamfest.

Pi-Star Update

Pi-Star 4.0 was released in beta earlier this year and 4.1 available as general release since most of us have been working from home, March 2020. According to the change log, these later versions bring many improvements for cross-mode support. These are YSF2xxx and DMR2xxx options: YSF2NXDN, YSF2P25, YSF2DMR, DMR2NXDN, DMR2YSF. There is no direct way to upgrade from 3.4.x or previous to 4.1.x. You must reflash your existing installation card or flash a new SD card. A new card is preferable in case you have a problem with the new version, pop-in the old SD card and boot. If your hotspot is a Pi-Zero, you should not overwrite your existing install right-away and give the new version a try on a separate card first.

Pi Zero W with ZUMSpot GPIO HAT board, compared to a quarter

Perform a backup in the web interface on the existing device. On the Dashboard, click Configuration, login, then click “Backup/Restore.” This will download a ZIP file with Pi-Star settings to your PC. Boot the new SD card and perform a restore by uploading the same ZIP file. I noticed some settings previously set were defaulted to initial values in the web interface. Do a once over for important settings and re-set them as necessary.

Pi-Star runs on nearly all Raspberry Pi models with a supported digital modem. It solved a problem, 3-4 years ago, when everyone making their own Raspberry Pi digital interface board with their own operating system image. It was anyone’s guess as to which worked and which was the “best” option. None of them worked well or consistently between users. Pi-Star solved that problem by taking the MMDVM software that can “speak” many different digital modes and network types, implemented a web front-end, and supported nearly all digital hardware boards. Once I got the hang of Pi-Star, I became a fan. The site by KE0FHS is probably the most complete documentation “notes” of the Pi-Star in one place. It’s a good read and provides a lot of great information about Pi-Star. I came across it looking up how to do custom host files for private reflectors.

One thing Andy – MW0MWZ, who wrote the Pi-Star web configuration front end, pointed out on the website was the move to Raspbian Buster for version 4.1 has been “painful” – citing missing drivers in releases among other issues. My experience with Pi-Star 4.1 on a Raspberry Pi Zero W was also painful. I’ll preface this by saying I tried 4.1 on a Raspberry Pi 3B and had less problems. I have a ZumSpot GPIO HAT for the Raspberry Pi. On the Pi Zero, after booting the first time, I was frequently greeted with weird errors and timeouts trying to configure the hotspot. Some settings were not remaining after I “applied changes.” Selecting my ZumSpot HAT from the modem list and saving, I would get a subsequent message saying I needed to select my modem from the list. Doing this a handful of times it would finally save. I saw ‘gateway timeout’ messages on both the Pi Zero W and Pi 3 during the first configuration session. I was able to seemingly avoid the timeout and configuration issues if I booted the Pi-Star on the new SD card and didn’t touch or connect for 15 minutes. Plug-it in and walk away for 15 minutes.

Once I figured that out, configuration went smoother. The web interface, though, sluggish is a nice way to put it. On the Pi Zero W with a fully updated Pi-Star 4.1.2 install, making any changes on the configuration page would take (on average) 1:45 to save. That’s right, one minute and 45 seconds. This is unusable. I’m changing modes constantly. Think about a net you forgot about. If you have to turn off one mode and turn on another, that’s 1:45 right there. Needing to make further changes to the newly enabled mode (change previously used reflector or network), you’re looking at 5 minutes before you’re on the net – if you don’t screw up. Some nets are over in that time. In comparison: 3.4.17 is at a somewhat more tolerable 45 seconds to save using a Pi Zero. Running both versions on a Pi 3B was nearly identical at about 25 seconds after clicking apply.

CPU load was much higher using 4.1.2 on the Zero. I suspect the under-powered nature of the Pi-Zero, OS and kernel upgrades in addition to the updated code of MMDVM and associated modules is causing these delays. As popular as the Pi Zero form factor is for addon boards and portability, it’s just waaaaaaay to slow for me to be useful. Not making configuration changes in the dashboard you won’t notice these issues so much because it runs fine otherwise. Stick with 3.4.17 on a Pi Zero or consider moving to a faster Pi like the 3B if you need 4.1.2 features now.

K8JTK Hub – now with P25 & NXDN

A quick update on my interlink system pet project, K8JTK Hub, I was able to add two more modes: NXDN and P25. Both are TG 31983 using hotspots or repeaters running the MMDVM software. If I include Wires-X (because it’s not full-time), that’s 6 digital systems and 3 analog systems – a total of 9 – that can communicate with cross mode interoperability. Being part of the AmateurLogic.TV net on Tuesday evenings, I determined packet loss was causing frequent data drops and disruptions. I moved the system to a new provider and that has remedied the problem. The net right after saw a significant improvement in data stream reliability. Huge thanks to the AmateurLogic guys allowing their net to be a load test of the system. They have a lot of fun with it as participants check into the net multiple times testing different modes. The Hub is open for all to use and for testing setups, all the ways to get connected are available here.

Field Day Bonus Points

Field Day will likely be completed by the time you read this, keep this in mind for next year. Sending 10 messages over RF from your site gets you 100 bonus points – including Winlink messages. I love to receive messages about your setup, stations, operating, or social activities taking place. These can be sent via the National Traffic System (NTS) or Winlink – K8JTK at Winlink.org – to my station. The Field Day rules state messages must leave via RF from the site (7.3.6). It does not state “formal messages” be in any particular format or utilize any particular network. A message to the SM or SEC must be in radiogram format and leave via RF or no credit will be given (7.3.5). If there is any question or problems, send the message using the NTS network or Radiogram form in Winlink.

With July around the corner, if you’re looking to do something while flipping burgers at your 4th of July picnic, my favorite event is the 13 Colonies Special Event which will be on the air July 1 – 7.

Thanks for reading and 73… de Jeff – K8JTK

Amateur Radio, ARRL Ohio Section, Computing, Ohio Section Journal

Ohio Section Journal – The Technical Coordinator – April 2020 edition

April 26, 2020 Jeffrey Kopcak

One of the responsibilities of the Technical Coordinator in the Ohio Section is to submit something for the Section Journal. The Section Journal covers Amateur Radio related things happening in and around the ARRL Ohio Section. It is published by the Section Manager Scott – N8SY and articles are submitted by cabinet members.

Once my article is published in the Journal, I will also make it available on my site with a link to the published edition.

Now without further ado…

Read the full edition at:

THE TECHNICAL COORDINATOR
Jeff Kopcak – TC
k8jtk@arrl.net

Hey gang,

Stay at home: day 42. Continuing to work from home. Haven’t seen co-workers or friends in a month and a half. Regular lunch outings and after work happenings have long since terminated. Virtual meetings and conferences have replaced in person interaction. Participation in Ham Radio activities is on the rise! Nets are seeing higher check-in counts than they’ve ever seen. The curve is rising for digital modes and logged contacts.

Are we all having fun yet during Corona Fest 2020?

As people are forced to work from home due to closures, companies are utilizing videoconferencing services to keep in touch with employees and teams. These are now methods for coordinating efforts and relaying the latest to employees about the status of their company. A videoconferencing solution was likely available for employees to interact with remote team members or vendors world-wide. Now, those services are utilized all-day, every day. My company decided to begin the transition from WebEx to Microsoft Teams for meetings. I liked WebEx and it generally worked. MS Teams, well it’s part of Office 365 and that’s probably down again. Corona Fest is forcing usage of these collaboration solutions, not only companies but social organizations that previously met in person. These include popular names like Skype, Google Hangouts, and Zoom.

Those who value open sourced solutions should use Jitsi or Jitsi Meet to hold meetings. The service is completely free and open-source where anyone can look at the source code of the project. The difference between Jitsi and Jitsi Meet: Jitsi is a roll-your-own solution meaning you can download server packages or code and deploy an instance however you want. Jitsi Meet Online is an extremely easy-to-use alternative solution for holding meetings – with no installation required.

Settings up a meeting is easy as visiting the Jitsi Meet Online link, create a name for the meeting, click Go, set a meeting password, then send out the meeting URL or phone numbers to participants. A meeting can be created in a matter of seconds! Yes, POTS phone service is available as part of the meeting for free. Note, plain old telephone service audio options will not be encrypted due to the nature of the technology. There is nothing to download for desktop PCs with a web browser and most smart devices. Smart phone apps are available for iOS and Android including the F-Droid store. Functionally, Jitsi Meet offers the same features as the others: video, audio, chat, and shared desktop.

If I had to pick one thing that I don’t like about Jitsi it is the use of WebRTC. Web Real-Time Communication is also a free and open-source project that provides web browsers and mobile applications with real-time communication (RTC). WebRTC is included in all modern browsers and enabled by default in most. This technology allows audio and video communication to happen without the need

to install additional plugins or apps. Makes it very easy. There are a couple problems with WebRTC in highly privacy focused implementations. One problem is the communication is direct, peer-to-peer. This makes it possible for a skilled individual to learn real Internet Protocol (IP) addresses even while the other is utilizing a VPN. Use of a VPN can allow a user to appear as though their traffic is coming from a different IP and aids in masking actual location. Corporations use VPNs to establish secure communications from their network to their endpoint devices over networks with unknown integrity. Another problem is that end-to-end encryption is not possible with WebRTC. Jitsi addresses this issue in their security document. End-to-end encryption (also abbreviated “E2EE”) is a method where only the communicating users can read messages exchanged, preventing eavesdroppers anywhere along the communication path.

I wish people used better tools such as Jitsi. That’s why there’s choice. I would use this for any meetings I hosted. It seems like a really good open-source alternative to the other solutions.

Zoom became very popular very quickly, almost overnight. It was even recommended right here in last month’s OSJ. Attacks and threats emerge as a result of that popularity and pose risks for users and clubs who are using these services to host meetings. Cyber criminals are crafting email messages to steal logon credentials and packaging malware to look like a Zoom meeting installer.

For most of us, club meetings are not doing anything that’s overly sensitive with Zoom. Some organizations (companies, agencies) banned the use of Zoom citing flaws in the encryption implementation making it easy to exploit and three Chinese companies develop the applications. These should be taken into consideration but there has been no evidence of influence resulting from these issues. Zoom should be commended, though, due to their responsiveness in correcting vulnerabilities and privacy issues that have been discovered in recent weeks.

Free for accounts, everything is managed by the Zoom cloud, including encryption keys. Data is encrypted between the clients and Zoom servers. However, audio is not encrypted if a paid account is using the POTS phone line options.

Shortly after its popularity exploded, so did the number of unwanted participants in meetings leading to the term “Zoombombing.” Having someone crash a meeting is obnoxious and an unwanted disruption. Examples of this have made the rounds where Zoom sessions were hijacked by individuals saying or showing things that are lewd, obscene, racist, or antisemitic in nature where everyone in the session can see or hear. Students themselves conspired to have pranksters harass teachers in their online classes. Others utilized ‘Wardialing’ tools to discover unsecured Zoom sessions. Wardialing is an early hacking term where every number in an area code was dialed to find computers, bulletin board systems, servers, and fax machines. The resulting list would be used to guess login credentials and gain unauthorized access to those systems. One person I know had her yoga session crashed by an individual cursing and displaying symbols associated with the National Socialist German Workers’ Party. I have not heard about any disruption to ham radio club meetings.

There are steps the organizer can take or have someone else follow the directions in the Zoom support articles to prevent these issues. Not all of these configuration recommendations are needed for every meeting, follow ones applicable to that meeting. For example, you may not want to lock a club meeting from participants but instead use a waiting room approach.

Latest version: ensure participants are using the most recent client version. In April alone, there have been three updates to the Windows client.

Meeting password: posting a meeting link to social media will draw attention. Send the event password to known users through a direct message or other means where your participants are known.

Waiting room: virtual staging area for guests and participants until you’re ready for them to join.

Manage participants: remove any participants that should not be in the meeting and set who can share their screen.

Disable video, file transfer, annotations, and private chat: cut down on distractions, unsolicited content, or messages as needed.

Accidental removal of a participant: a booted user cannot rejoin a session using the same email address unless a few settings are changed.

Put participants on hold during breaks: attendees audio and video can be disabled during lunch, bio breaks, or private moments.

Video recordings: exercise discretion when recording content and know where that content is stored. Paid customers have the option to record a meeting to the cloud.

Following these tips can lead to a successful, uninterrupted meeting.

I saw a posting by the developer of the MMDVM software, Jonathan – G4KLX. Digital hotspot and repeater owners should follow these guidelines.

This message contains important information that I want disseminated far and wide please.

I have been approached by the people who run aprs.fi and REF001/REF030 (not the same people) about problems being caused by hotspots. This is down to usage and I hope that people will act on this information:

1. APRS, it is important that when configuring your hotspot, that you ensure that the suffix used for accessing aprs.fi is unique. For example if you use more than one hotspot, then ensure that for every mode and for every hotspot, the aprs.fi access callsign is unique. This is usually done by specifying a unique suffix to the callsign used by the hotspot. If more than one hotspot attempts to access aprs.fi with the same callsign+suffix combination, the first one is thrown off, and the new one connects. In the meantime the original one tries to connect and throw the new one off. This can happen multiple times per second, and is causing problems for them. Please, please, please, look at your configurations and if you have a duplicate, change one of them.

2. REF001/REF030, apparently the network load on these D-Star reflectors is now very high due to the number of hotspots connecting and staying connected. Could you please consider changing your gateway configuration so that you disconnect after a certain period of inactivity (this means local RF activity) so that they aren't overloaded. I know we like to listen out for activity, but we must also realise that D-Star popular reflectors const money to run, and that includes network and processor usage. A quick look at their dashboards will reveal the problem, they're huge.

Jonathan G4KLX

Set unique SSIDs for APRS on different modes and on different hotspots. Finding where APRS information originates isn’t always easy with hotspots. The OpenSPOT 1 has a location information box in settings but it is not transmitted directly by that device, rather Brandmeister pushes that information to the APRS network. Disabling APRS data on the Pi-STAR requires editing the config files and setting priority messages in Brandmeister. The priority message solution should work for OpenSPOT devices too.

ZUMSpot on Raspberry Pi Zero compared to a quarter

Unlink from reflectors, talkgroups, and systems when you’re not using them, especially ones with large numbers of connected users. Users are apparently leaving their devices connected to popular reflectors ting up bandwidth and resources unnecessarily.

To put this into perspective, when I looked at REF001 there were 850 remote/hotspot users connected, about the same on REF030. A mere 12 had transmitted since they were connected. A 5 second transmission is about 9KB worth of Internet traffic. Multiply that by 850 connected devices, that’s 7.6MB of traffic in 5 seconds to connected hotspots, many of which are not being used. That’s an estimated 80 gigabytes or so for an hour-long net. There are ping/heartbeat packets to all connected devices even when the reflector does not have an active radio transmission taking place.

Please check your hotspot APRS configurations and disconnect when not in use.

K8JTK Hub Interlink System

Anyone wanting a place to meet-up for checking on friends and fellow hams or looking for something to do can use a system I’ve been working on the last few months. Currently, it offers 6 full-time ham radio VoIP modes interlinked for interoperability. Ways to access the system:

EchoLink: K8JTK-R 233196
AllStar Link: 50394
Hamshack Hotline: 94026
DMR: Brandmeister TG 31983
D-STAR: DCS/XLX983 A
YSF: K8JTK Hub 17374

Since I’m working from home, I’ve linked up my Wires-X room: K8JTK-ROOM 40680

More information or updates on the system: http://www.k8jtk.org/ham-radio/k8jtk-hub-digital-voip-mutimode-interlink-system/

Thanks for reading and 73… de Jeff – K8JTK

Amateur Radio, ARRL Ohio Section, Ohio Section Journal

Ohio Section Journal – The Technical Coordinator – October 2019 edition

October 27, 2019 Jeffrey Kopcak

One of the responsibilities of the Technical Coordinator in the Ohio Section is to submit something for the Section Journal. The Section Journal covers Amateur Radio related things happening in and around the ARRL Ohio Section. It is published by the Section Manager Scott – N8SY and articles are submitted by cabinet members.

Once my article is published in the Journal, I will also make it available on my site with a link to the published edition.

Now without further ado…

Read the full edition at:

THE TECHNICAL COORDINATOR
Jeff Kopcak – TC
k8jtk@arrl.net

Hey gang,

I received a question last month from Andy – KD8SCV on setting up a digital hotspot transmit frequency compliant with “Line A.” I’ll address these as two separate issues. If the hotspot or simplex node is within the correct ranges of the band plan, Line A doesn’t matter. You’re going to need your copy of Part 97.

What is Line A? It is an approximate border between the U.S. and Canada that varies in exact location but is most often 75 miles (about 121 km) from the border. According to Part 97.3(a):

(30) Line A. Begins at Aberdeen, WA, running by great circle arc to the intersection of 48° N, 120° W, thence along parallel 48° N, to the intersection of 95° W, thence by great circle arc through the southernmost point of Duluth, MN, thence by great circle arc to 45° N, 85° W, thence southward along meridian 85° W, to its intersection with parallel 41° N, thence along parallel 41° N, to its intersection with meridian 82° W, thence by great circle arc through the southernmost point of Bangor, ME, thence by great circle arc through the southernmost point of Searsport, ME, at which point it terminates.

This is the same wording as Title 47 of the Code of Federal Regulations (CFR), Section 90.7. Doesn’t tell you much, like why does it exist? This information is a little sparse. Possibly to protect land mobile stations in Canada. Land Mobile Service (or LMS) is defined by the ITU as communications between base stations and mobile stations or between mobile stations. Think public service agencies and even private companies to coordinate people, resources, safety, or security. Amateur Radio is allocated secondary status on most U.S. allocations above 1.25m or the 220 MHz band. 420-450 MHz is shared with federal agencies and military for radar applications such as PARCS located in North Dakota near the Canadian border. As it pertains to the Amateur Radio service:

(1) No amateur station shall transmit from north of Line A in the 420-430 MHz segment. See §97.3(a) for the definition of Line A (Part 97.303(m)).

For stations in the western part of the state north of 41° N, no transmissions between 420-430 MHz can be made. This includes the cities of Ottawa, Findlay, Tiffin, Willard, New London, and Lodi. Close to the intersection of State Route 83 and Interstate 71, near the cities of Lodi in Medina county and Burbank in Wayne county, is where 41° N and 82° W intersect. From that location, Line A takes a northeast trajectory to Bangor, ME. North of Line A constitutes Medina, much of the Cuyahoga Valley, Hudson, bisects Streetsboro and Mantua, Hiram, West Farmington, North Bloomfield, and Andover.

For those wondering, there is a Line B, Line C, and Line D. In Canada, Line B is opposite to Line A while Line C and D divide the Alaskan border with Canada. There is no mention of Line C in Part 97. Land mobile stations licensed north of Line A or east of Line C requires additional coordination with Canadian authorities.

The FCC has provided a couple resources that depict Line A and check Line A coordinates. The checking site won’t accept Google Maps coordinate format. It requires NAD83. I found a converter that worked well. On a Google Map, left-click until a small gray marker appears on the map. Coordinates will appear in a pop-up in the lower-center of the map. 41.460459, -81.911875 for example. Copy them. Go to the West Virginia coordinate conversion website. Paste them under “Input Coordinates.” “Lat/Lon WGS 1984” should already be selected. Under “Output Coordinates,” select “Lat/Lon NAD83.” Click Covert. Copy the output coordinates (removing the negative symbol and spaces) into the FCC Line A check site. Example Lat: 412737.6, Lon: 815442.7. The site will return “North of Line A” or “South of Line A” for the relative location.

As a general rule, don’t transmit 420-430 MHz within 80 miles from the Canadian border and you’ll be golden.

For everyone, the following applies in Part 97.303(m):

(2) Amateur stations transmitting in the 420-430 MHz segment must not cause harmful interference to, and must accept interference from, stations authorized by the FCC in the land mobile service within 80.5 km of Buffalo, Cleveland, and Detroit. See §2.106, footnote US230 for specific frequencies and coordinates.

(3) Amateur stations transmitting in the 420-430 MHz segment or the 440-450 MHz segment must not cause harmful interference to, and must accept interference from, stations authorized by other nations in the fixed and mobile except aeronautical mobile services.

80.5 km is a little more than 50 mi. Check the FCC or Radio Reference sites for issued licenses between 420 and 430 MHz in Ohio. Many licenses are assigned in the Cleveland and Toledo areas.

My OSJ article last year, though pertaining to hotspots and satellites, addressed the hotspot frequency question nicely. I’ll reiterate because this is important. Under Part 97, hotspot devices are considered an auxiliary station. In general, advice would be to ‘check with the local frequency coordinator’ but experience with the coordinating group indicates they won’t be of any help. Where should you operate a digital hotspot or digital simplex node? I do like the ARRL’s Band Plan because it spells out many details not included in graphical representations. Note: this advice only applies to the U.S. band plan. The band plan has allowances in the following frequency ranges for simplex, auxiliary stations and control links:

146.400 – 146.580. Usable (at 12.5 KHz spacing): 146.4125 – 146.5675
433.000 – 435.000. Usable (at 12.5 KHz spacing): 433.0125 – 434.9875
445.000 – 447.000. Usable (at 12.5 KHz spacing): 445.0125 – 446.9875

“Usable” indicates the lower and upper frequency limits that can be used and programmed into a digital hotspot. Don’t forget to stay away from the national calling frequencies of 146.520 and 446.000. Some of these ranges are shared with repeater links so remember: it is your responsibility to ensure correct operation of your equipment and find a frequency not already in use before using it! There is NO excuse for not adjusting frequency to eliminate interference with other operators and equipment! Listen to the desired frequency by setting up a radio or scanner with the volume turned up. If you hear any kind of obvious traffic, data bursts, or digital screeching, pick another frequency then rinse and repeat. Notice none of these allowances include frequency restrictions imposed by Line A.

Every hotspot user and repeater owner reading this needs to verify your operating frequencies and take corrective action, if required. Auxiliary stations cannot operate within the satellite sub bands. Many hotspots are operating there illegally. Satellite sub bands for 2 & 440 are:

2 m: 145.800 – 146.000
70 cm: 435.000 – 438.000

If your hotspot is operating near edges where deviation would fall into an unauthorized band segment, operating “out-of-band” (ie: weak-signal, satellite), or operating 420-430 MHz and located “North of Line A”, you need to take corrective action now! Your cooperation is greatly appreciated!

Yahoo! Groups is going away! Since 2001, the service allowed users to “build relationships, stay in touch, share ideas, and discuss interests through the convenience of popular e-mail and Web-based tools.” Many ham radio groups over the years have used or are using Yahoo! Groups to coordinate and collaborate.

An SSTV Net in Cleveland used Yahoo! Groups to share received pictures and offer support for stations having trouble with their setup. It was the first time I used the service. Special interest groups formed on a wide variety of topics including scanner information, D-STAR, DMR, and System Fusion.

A note sent to users laid out the time line of the impending shutdown:

Beginning October 28 you won't be able to upload any more content to the site, and as of December 14 all previously posted content on the site will be permanently removed. You'll have until that date to save anything you've uploaded.

Moving or saving data needs to happen relatively quickly should you or group members want to keep the information. Read this knowledge base article to understand the changes and information on how to save content from your groups. Steps don’t seem quick or easy.

An ARS Technica article provides more details on the shutdown. Citing a successful service with 110 million users in 2010, Yahoo failed to adequately compete in other areas after being acquired by Verizon. Verizon responded by cutting budgets and staff.

I mentioned Groups.io in July as a service I joined earlier this year to keep updated on different ham radio projects. Feedback has been positive and many are recommending it as a place to transition before the shutdown. Groups.io doesn’t serve ads, track users, and has a better reputation than Facebook, which I neither use nor trust. Featuring a modern platform for communities to connect through messaging, calendar, chat, polls, databases, photos, wiki, and integration with a list of other platforms. Great place for projects to post documentation and offer support or as a platform to keep in-touch with club members. Some indicated greater engagement with club members and more attendance.

A wiki article posted contains instructions for moving content to Groups.io. It indicates transfers need to be initiated before December 1, 2019 to guarantee the transfer of content from Yahoo! Groups to Groups.io – though Yahoo was having issues with Photos.

Last month, I was invited to give a presentation at the meeting of the Lake County Amateur Radio Association (LCARA). The presentation was about, well, me. I talk about my biography including schooling, how I got involved with groups, jobs, and other presentations I’ve put together. Most importantly, talk about the duties and responsibilities of the Ohio Section Technical Coordinator and technical resources available to hams in the Ohio Section. I had a great time as I don’t get out to Lake county often and it was a fantastic day for a drive. The club was very welcoming. LCARA has many members passionate about different aspects of the hobby and they report on each during their meeting. A good time was had by all.

If you would like to know more about the TC position within the Ohio Section or want to know more about the technical resources available in our section, contact myself or a Technical Specialist.

Thanks for reading and 73… de Jeff – K8JTK

Amateur Radio, ARRL Ohio Section, Ohio Section Journal

Ohio Section Journal – The Technical Coordinator – October 2018 edition

October 15, 2018 Jeffrey Kopcak

One of the responsibilities of the Technical Coordinator in the Ohio Section is to submit something for the Section Journal. The Section Journal covers Amateur Radio related things happening in and around the ARRL Ohio Section. It is published by the Section Manager Scott – N8SY and articles are submitted by cabinet members.

Once my article is published in the Journal, I will also make it available on my site with a link to the published edition.

Now without further ado…

Read the full edition at: http://arrl-ohio.org/news/2018/OSJ-Oct-18.pdf

THE TECHNICAL COORDINATOR
Jeff Kopcak – TC
k8jtk@arrl.net

Hey gang,

Digital mode access points, often called hotspots, have been in the news lately. Those are the 10mW personal devices used by digital operators to cover a relatively small area like a house, car, or hotel room. Instead of tying up a gateway repeater, which largely connects local users to the Internet, many have opted for these low-powered devices to provide similar functionality. Advantages over a repeater are the hotspot owner has complete control over which reflector, repeater, or talkgroup their hotspot is connected to. They are not beholden to the preferences of the repeater owner and have the flexibility to use their hotspot however they’d like. Many use them mobile in the car or take them on a trip allowing them to enjoy their favorite digital modes where there may not be repeater coverage.

Hotspot devices in general are about the size of a deck or two of cards and require an Internet connection, computer to run the software, application or web browser for configuration, and a radio capable of operating each mode. An Internet connection can be your home WiFi or cellphone hotspot (as in WiFi-hotspot). The original OpenSpot was the only device that required a wired Ethernet connection. A PC computer may serve as the Internet connection for USB access points. The computer could be a Raspberry Pi in many cases or might be completely self-contained. A web browser or application is needed to make configuration changes and adjustments such as call sign, transmit frequency, mode, or network. These hotspots are the RF gateway to the internet which means a radio capable of transmitting and receiving that mode is also required. Few hotspots today are single mode like the D-STAR DVAP. Nearly all on the market are capable of operating multi-mode and connecting to associated networks. To operate DMR the user would need a capable DMR radio, a capable Fusion radio for the Fusion networks, and so-on.

Hotspots can utilize the many available modes & networks:

DMR: BrandMeister, DMRplus, XLX
D-STAR: DCS, DPlus, XRF, XLX
Fusion: FCS, YSFReflector
NXDN: NXDNReflector
P25: P25Reflector

A keen eye might ask about Wires-X, P25net, or DMR-MARC. Those networks cater to a specific manufacturer of equipment and are often closed to other vendors. You might be able to reach resources on those networks because someone has cross-linked a closed network with an open network, usually at the point where digital signals turn into analog audio. This is how a user can be on Wires-X America Link and talk with a DMR user.

Hotspots and satellites

Not the Dave Matthews Band song Satellite either. A major issue for other hams has been caused by hotspot users. Every hotspot user and repeater owner reading this needs to verify your operating frequencies and take corrective action, if required. Under Part 97, hotspot devices are considered an auxiliary station. Auxiliary stations cannot operate within the satellite sub bands. Many hotspots are operating there illegally. Satellite sub bands for 2 & 440 are:

2 m: 145.800 – 146.000
70 cm: 435.000 – 438.000

If your hotspot is operating within those frequencies or near the edges, within the weak-signal sub bands, or any other sub band likely to cause issues, you need to take corrective action now!

In general, advice would be to ‘check with the local frequency coordinator’ but experience with the coordinating group indicates they won’t be of any help. What should you do? Note: this advice only applies to the U.S. band plan. Every band plan I’ve seen has the satellite sub bands defined. I do like the ARRL’s Band Plan because it spells out many details not included in graphical representations. The band plan has allowances in the following frequency ranges for simplex, auxiliary stations and control links:

146.400 – 146.580. Usable (at 12.5 KHz spacing): 146.4125 – 146.5675
433.000 – 435.000. Usable (at 12.5 KHz spacing): 433.0125 – 434.9875
445.000 – 447.000. Usable (at 12.5 KHz spacing): 445.0125 – 446.9875

“Usable” indicates the lower and upper frequency limits that can be used with a digital hotspot. Don’t forget to stay away from the national calling frequencies of 146.520 and 446.000. Some of these ranges are shared with repeater links so remember: it is your responsibility to ensure correct operation of your equipment and find a frequency not already in use before using it! There is NO excuse for not adjusting frequency to eliminate interference with other operators and equipment! Listen to the desired frequency by setting up a radio or scanner with the volume turned up. If you hear any kind of obvious traffic, data bursts, or digital screeching, pick another frequency then rinse and repeat. Your cooperation is greatly appreciated!

OpenSPOT2

Right after Dayton I started hearing rumors that the OpenSPOT was discontinued. Not the news you want to hear if you just purchased one at Dayton. The website eventually confirmed the rumors and that another device was to be announced “soon,” which turned into months. Finally, the SharkRF OpenSPOT2 was announced. This replacement addresses many issues of the now legacy device including the need for a wired Ethernet connection, limited portability, and lack of newer digital modes.

Feature-wise it is nearly the same but includes a much-needed internal WiFi antenna and support for NXDN and P25 (two up-and-coming digital modes in ham radio). It includes POCSAG which I’m not familiar but told is a paging standard. Those under 35 have no idea what a pager is. The device operates off a USB-C cable (included) and looks to be about the size of a computer mouse. It will still have cross-mode support for DMR and Fusion radios and networks. As with the previous, you will not be able to use your D-STAR, NXDN, or P25 radio in cross-mode. Release date is expected before the end of 2018. Stay tuned to their website and social media portals for exact date.

ZUMspot review

At Dayton I added to my hotspot collection. On my shopping list was a ZUMspot or something I could use with the Pi-Star software. I picked up a ZUMspot kit and case from HRO. The kit lists for $130, $110 without the Pi board. The case adds $15. The kit came with the amazingly small Raspberry Pi Zero W (W for Wireless) and the ZUMspot modem board from KI6ZUM. You’ll need to provide a Micro-USB cable which powers both devices. I’ve seen demos and received feedback saying Pi-Star was a great application to use – and is stable. Many had issues with the DVMEGA (in particular) getting a good distribution that worked reliably with that device. Pi-Star is software written by Andy – MW0MWZ. It is distributed as a Raspberry Pi image for use with Digital Voice modems.

All configurable options are available through the web interface. It’s convenient and you don’t have to mess around with multiple interfaces or carrying around a screen for the device. Services like SSH are available but generally not needed.

Before I tried to use the image, I knew I had an issue. Since this was my first Pi device without a wired connection, I couldn’t edit the WiFi settings by wiring it to my network. Instead I mounted the SD on a Linux system and edited the /etc/wpa_supplicant/wpa_supplicant.conf to include my WiFi information. Booted the ZUMspot and it connected to my wireless auto-magically. The Pi-Star site has a utility to help create the wpa_supplicant.conf file.

I’ve primarily used the ZUMspot on D-STAR and DMR but it supports all modes and networks mentioned earlier in the article. It doesn’t do as well as the OpenSPOT when D-STAR stations are marginal into their gateway. There’s more “R2D2” on the ZUMspot in that respect but it’s a minor issue. Pi-Star can enable multiple digital modes at one time. This is a great selling point and works great if conversations happen at different times on different networks. It is a “first wins” scenario. If a D-STAR transmission ends and one on the DMR network starts, nothing will be heard on the D-STAR radio until the DMR transmission ends. In other words, parts of an otherwise interesting conversation maybe missed. The case is a bit of a jigsaw puzzle but it’s fairly easy to figure out from the picture that was provided. The ZUMspot is an excellent little device and I’m happy with it.

Technical Specialists report

Dave – KD8TWG has been very busy recently. He was again in charge of the communications and networking for the Great Geauga County Fair where they run APRS tracking of their golf carts, setup a phone system and IP cameras to cover the fair. At the Cleveland Hamfest he gave his presentation on Digital Modes. He compared and contrasted modes available to ham radio operators, including quality and radio options. Updated for this year was information on digital scanners and receiving the MARCS statewide digital system. Coming up on October 30, he and a few buddies will be putting on a “Test and tune” night for LEARA. It’s a great opportunity to check operation of radio equipment and make sure it is not transmitting spurs and harmonics (*cough* *cough* Baofengs *cough* *cough*). Contact Dave if you’re in the Cleveland area, or myself for the rest of the section, to have a similar program at a club meeting or hamfest.

If you were involved with the State Emergency Test, Black Swan exercise the weekend of October 6 & 7, you likely received bulletins from The Ohio Digital Emergency Network (OHDEN). Eldon – W5UHQ and crew gave up a good portion of their weekend to help with this event. They did a fine job of handling bulletins from the EOC and those stations that came through on the wrong communication channels. Join them for the OHDEN net on 3584.500 USB using Olivia 8-500 set to 1500 Hz on the waterfall each Tuesday at 7:45 PM eastern.

WB8APD, SK

I received word that Trustee Emeritus and past long-time Treasurer for LEARA, Dave Foran – WB8APD became a Silent Key on October 10, 2018. I knew Dave for about 10 years as a member of the LEARA board and mentor but knew the impact he made on the Ham Radio community long before I was a ham. In the time I knew him, Dave was always a behind the scenes guy – rarely getting on the radio. He was instrumental in getting repeater sites and maintaining equipment for LEARA including having an input for one of the repeaters at his house. Stories have been told that his basement was the print shop for the club’s newsletter when the club had 400+ members no-less. Dave was incredibly smart with technology and the Internet before most of us knew what it was. He worked for the phone company and the joke was “Dave had half of Ma Bell in his basement.” Internet linking was something he was into early on with his own IRLP node. He owned a server that, for a long time, served resources for the Cleveland area – not only ham radio clubs but community organizations too.

Maybe you even dialed into the old HamNet BBS system located in Dave’s basement (yet another reference those under 35 won’t understand). Dave was my mentor with technologies LEARA was using as I was going to be helping or taking them over. He is the reason I’m into digital modes. Cleveland’s first D-STAR repeater was in-part Dave’s doing. Of course I had problems at first and he was my go-to for questions. The little space here covers only a fraction of his involvement and lives he impacted through his countless contributions. Goodbye and 73, Dave.

Thanks for reading and 73… de Jeff – K8JTK

Jeffrey Kopcak, MBA – K8JTK

Tag Archives: Digital Hotspot

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Ohio Section Journal – The Technical Coordinator – October 2019 edition

Ohio Section Journal – The Technical Coordinator – October 2018 edition

Hotspots and satellites

OpenSPOT2

ZUMspot review

Technical Specialists report

WB8APD, SK

Ham radio and tech.