PUCS: Take control of the pile-up!

Every special event station (SES) operator knows the thrill — and the chaos — of a true pile-up. The excitement of dozens of stations calling you simultaneously can quickly turn into frustration when QRM, doubles, and missed calls clutter the frequency. Wouldn’t it be great if there were a way to bring order to that chaos without losing the fun of real-time operating?

Enter PUCS, the Pile-Up Control System, a fully open-source, web-based platform designed by and for radio amateurs. Born from the ingenuity of the Radio Scouting Fellowship PA3EFR/J, PUCS elegantly blends traditional ham ingenuity with modern AI-assisted software development. The result is a modular, flexible system that any club or individual can tailor to their own operating style — from large-scale SES activities to small club field days.

PUCS can be seen operational at pucs.pa3efr.nl

From Normandy to the Netherlands

The idea for PUCS was sparked during an SES operation on the beaches of Normandy, where operators of TM80DDAY overheard multiple Australian colleagues discussing a private sign-up system for QSOs. Intrigued but unable to obtain the software, Erwin PA3EFR and his team decided to build their own version — and then share it freely with the world. With the help of AI tools and some Python wizard Barry, PC1K, PUCS was born. It was much later when Erwin decided to develop PUCS within his own environment.

Today, PUCS is freely available, fully documented, and open to anyone willing to experiment. It’s more than just software — it’s an invitation to collaborate, learn, and contribute to a smarter way of managing pile-ups.

What Makes PUCS Unique

At its heart, PUCS is a distributed system consisting of two parts:

• Frontend (commercial hosting): This is the public entry point where operators register their callsigns to join the queue. Think of it as a digital “waiting room” — transparent, fair, and visible to everyone.  
• Backend (local PC): Here’s where the magic happens. The backend checks QRZ.com logbooks every minute, automatically removes callsigns that have already been worked, and provides an admin dashboard to manage the queue, export logs, and adjust settings on the fly.

The system uses Python’s Flask framework, SQLite databases, and SocketIO for real-time updates — all standard, well-documented technologies familiar to many technically minded amateurs. It’s simple enough for a club to host on a modest PC, yet robust enough to handle large SES events.

Open Source, Open Spirit

PUCS is more than a tool — it’s a philosophy. The creators explicitly invite others to modify, enhance, and restyle the system to their own preferences. Whether you want to change the interface colors, add logging features, integrate digital modes, or redesign the operator dashboard, the code is yours to explore. There’s no hidden agenda, no locked components — just open code and open collaboration.
All scripts, examples, and documentation are available on GitHub:

https://github.com/PA3EFR/PUCS

Why You Should Try It

PUCS is a perfect project for your club’s next technical workshop. It offers practical lessons in networking, APIs, databases, and web hosting — all wrapped around a real amateur radio application. 
Beyond that, it promotes fairness in pile-ups, gives weaker stations a chance to make contact, and even allows SWLs to log their participation.

So fire up your soldering iron if you must, but this time, your “kit” is made of code.
Download PUCS, make it your own, and bring calm to your next pile-up.

As Erwin, PA3EFR, says: “Ask AI as your friend for support — and enjoy your own moments of challenge!” On behalf of the Radio Scouting Fellowship PA3EFR/J we look forward to see you on our PUCS screens at a next special event occasion.

~ Sander PD9HIX

Here are three affordable accessories that can help round out your VHF/UHF handheld transceiver (HT) kit. These items can significantly improve the performance of your radio and make it more useful.

1. A Halfwave Antenna for 2m

I’ve already written about the RH660 antenna, which is a huge improvement over a typical rubber duck antenna. Make sure you get the version with the proper connector for your HT.

A New 2m/70cm Telescoping Antenna

2. A Compact Magmount Antenna

Another handy antenna is a small magnetic-mount antenna for the 2m and 70cm bands. The primary usage of this antenna is on the roof of a vehicle, connected to your HT inside your vehicle. This puts the antenna on the roof, outside of the vehicle, working in concert with the effective ground plane of the metal roof. Note that for the magnet to hold, the roof needs to be made of a ferrous metal, not aluminum, fiberglass, fabric, etc.

This antenna can also function as a portable/temporary antenna by placing it on a steel object such as the top of a refrigerator, a cookie sheet, metal door frame, filing cabinet, metal folding chair, etc. The antenna is about 19 inches in length, so it packs well for travel. There are many models available, including this one on Amazon.

3. A Few RF Adapters

It seems that we often encounter incompatible RF connectors, so it is good to have a few adapters available to make the connection.

SMA Male/Female Adapters
These days, handheld transceivers have SMA antenna connectors, but some models provide a male connector, while other radios have a female connector. Having a few SMA adapters can deal with this issue.

SMA to BNC Adapters
BNC connectors often show on on various radios and cables, so it can be handy to adapt this popular connector to an SMA.

SMA to PL-259 Adapters
The PL-259 and its companion SO-239 are the most popular RF connectors for ham radio use, so you may encounter one of these. (I try not to call them UHF connectors: see About That UHF Connector.) They are not used on HTs, but you may find an antenna cable with one of these attached. Again, an adapter or two can help you make the connection to an SMA connector.

These are some handy devices to have along with your HT.
Any other suggestions?

73 Bob K0NR

P.S. If you are having trouble identifying the connector on your HT, take a look at this article: What’s That Connector On My HT?

The post Three Useful HT Accessories appeared first on The KØNR Radio Site.

Commemorative VHF Net check-in 

Tuesday 7 October at 8 pm (PST)

SARC will be hosting its usual net at 8 pm (Pacific time) on Tuesday, October 7 on frequency 147.360 MHz +600 KHz, tone 110.9 Hz for a special commemoration of the society’s founding on Tuesday, October 7, 1975.   

Members and non-members are invited to check in.  We'll also be connecting to IRLP reflector 9005 for any stations who wish to join from outside our repeater’s footprint.  You can connect a repeater or your personal device by dialing node 9005.  

You can read about SARC's history at The Communicator Digital Edition: The Communicator July - August 2025

We encourage SARC members, past students, non-members, and readers of The Communicator to check in on this historic net and we hope to commemorate our 50th anniversary with a record number of check ins.

~

I came across this new antenna, the TWAYRDIO RH 660S, mentioned in this Ham Radio Crash Course video. I have previously been recommending the TWAYRDIO TH770 antenna via this post. The RH 660S is a newer dual-band 2m/70cm telescoping antenna from the same company.

For Summits On The Air (SOTA), I generally take along such an antenna. The performance of any half-wave antenna on a handheld radio is always much better than the standard rubber duck. Although a 3-element Yagi antenna provides even better performance, it has to be pointed in the right direction. Sometimes, we will set up the RH 660 or TH 770 on a small vertical pole (actually a camera monopod with a homebrew BNC attachment). This allows us to monitor and work the band with an omnidirectional antenna without having to hold or point the Yagi. Much more convenient while sitting there eating lunch.

A key advantage to an omnidirectional antenna is that it is always pointed in the right direction.

The RH660 is available with the three standard connectors: BNC, SMA Male and SMA female. Make sure you pick the right one that matches your radio.

On our most recent SOTA activation, I did a quick comparison between the old TH 770 and the new RH 660 on 2 meters. The RH 660 seemed to perform ever so slightly better, but that was probably within the measurement error of the test. It certainly was not worse than the TH 770. I only did the comparison test on 2 meters, as that is the GO TO band for VHF SOTA. However, the antenna seemed to work OK on 70cm as well.

The packaging on the antenna indicates 3.0 dBi gain on 144 MHz and 5.0 dBi gain on 430 MHz. Do I believe those numbers? Not really, but they are probably close. (An ideal halfwave radiator has a gain of 2.2 dBi.) Note that the newer antenna does not have the magic tuning lump in the middle of the radiating element, which simplifies the mechanical design. This is the main advantage of the new antenna: no lump in the middle, resulting in a slimmer and sturdier design.

Summary

I am pleased with this new design, and I now recommend it as a good compact antenna for portable use. As with all telescoping 2m half-wave antennas, it is long and should be handled with care. Otherwise, you can poke someone’s eye out, break it in two, or snap the connector off your HT.

The RH660 antenna is available at Amazon for ~$17. At this price, why wouldn’t you have one in your backpack or Go Bag?

73 Bob K0NR

The post A New 2m/70cm Telescoping Antenna appeared first on The KØNR Radio Site.

You’ve probably seen the messages about the ARRL push for relief from antenna restrictions by Home Owners Associations (HOAs). If not, take a look here. It is clear that excessively tight HOA restrictions are a significant barrier to getting started in ham radio.

ARRL has launched a nationwide grassroots campaign aimed at securing the passage of federal legislation that would grant Amateur Radio Operators the same rights to install antennas on their property as those enjoyed by users of TV antennas, wireless internet, and flagpoles.

The campaign, announced in an ARRL Member Bulletin on September 17, 2025, follows the reintroduction of the Amateur Radio Emergency Preparedness Act in February 2025 (see ARRL News 02/07/2025). The bipartisan bills — H.R.1094 in the House and S.459 in the Senate — are designed to prevent restrictive homeowners’ association (HOA) rules that currently prohibit or severely limit the installation of amateur radio antennas, even when such antennas are hidden in trees, placed in attics, mounted on vehicles, or look like flagpoles.

While the ARRL is pushing for this bill, I have not seen much written about what is actually IN the bill. You can read the entire text here: HR 1094 – Amateur Radio Emergency Preparedness Act.

But here’s my summary. The bill requires that specific amateur radio antennas not require approval from HOAs or similar organizations:

• Antennas that are 1 meter or less in diameter
• Flagpole antennas, not to exceed 43 feet in height
• Wire antennas – minimally obtrusive wire antennas
• Vertical antennas – not to exceed 43 feet in height

Note that this does not mean you will have the right to put up a 60-foot tower with multiple large antennas on it. Some folks are probably disappointed in the limited nature of this bill. My view is that it is a reasonable accommodation to basic ham radio operation, very reasonable for urban and suburban environments. If you want to build the ultimate contest station, you’ll need to buy some rural property. This ARRL page provides some background on why this bill makes sense.

I am somewhat surprised by the 43-foot height limit for vertical antennas. This is apparently a carryover from previous ARRL legislative attempts. I would settle for something shorter than this…but what the heck. For reference, a quarter-wave vertical for the 40m band is about 33 feet high.

I think the ARRL has lined up the legislation, the lobbyists, and some Congresspeople to push this through. Can we get this passed? I don’t know, but I suggest we all get behind this by making our voices heard in Congress. The ARRL has made this VERY EASY to do. Just go here: https://send-a-letter.org/hoa/

That’s my view. What do you think?

73 Bob K0NR

The post ARRL – Pass The Bill appeared first on The KØNR Radio Site.

This publication, "The Communicator" from Surrey Amateur Radio Communications (SARC), serves as a bi-monthly electronic periodical for amateur radio operators. It covers a wide array of topics, including historical figures in radio. This month Jonathan Zenneck and Edwin Armstrong. In this issue we also provide technical explanations of radio propagation phenomena such as the Gray Line and solar indices, and practical guides for amateur radio activities like building antennas. We take a closer look at specific radio equipment (Baofeng, Icom, and Anytone), and engaging in digital modes like FT8. 

The Communicator also features emergency preparedness strategies, and the diverse interests and community focus within amateur radio. Furthermore, it touches upon innovative developments like the Linux Handie Talkie (LinHT) and the importance of in-person technical conferences for knowledge exchange.

Now read in over 165 countries, this issue brings you 130 pages of Amateur Radio content from the Southwest corner of Canada and around the globe. With less fluff and ads than other Amateur Radio publications, you will find Amateur Radio related articles, projects, profiles, news, tips and how-to's for all levels of the hobby.

Previous Communicator issues:

Search for past Communicator issues

We now have a comprehensive searchable index back to 2007
HERE.  

As always, thank you to our contributors, and your feedback is always welcome. 

The deadline for the next edition is October 15th.

If you have news or events from your club or photos, stories, projects or other items of interest from BC or elsewhere, please contact us at [email protected]

73,

John VE7TI
'The Communicator' Editor

The Table of Contents for the September - October 2025 Communicator issue:

Joyce/K0JJW and I did a SOTA activation with Mike/KE0PWR on Aspen Ridge (W0C/SP-084). It turns out that Mike’s wife, Laurel, has a YouTube channel, so she shot some video of our adventure. Keep in mind that her channel is not focused on ham radio, but has a more general audience.

Some time later, Mike did a SOTA activation on his own with Laurel capturing the story via video. This was on Wander Ridge (W0C/SP-042), one of my favorite summits near the Continental Divide Trail. Yes, it was windy on top. I made a cameo appearance via 2m FM. Short Buena Viking plug at the end (one of my favorite local restaurants).

And finally, here is another activation with Mike on South Peak (W0C/SR-111), near Weston Pass. In this episode, Mike demonstrates how the signal disappears if you lay the Yagi antenna on the rocks. I make another guest appearance via 2m FM.

Laurel plugs the PBJ Bobo’s, which are now my favorite hiking snack. (I am not addicted to these things. I can stop eating them anytime I want.)

Great job, Mike and Laurel!

73 Bob K0NR

The post Laurel Makes SOTA Videos appeared first on The KØNR Radio Site.