QSSTV-Experimental is an amateur-radio program for sending and receiving SSTV (slow-scan television) and HAMDRM / DSSTV (digital SSTV) pictures using a sound card. It is compatible with most of MMSSTV and EasyPal. Substantial changes have been made versus upstream QSSTV.

All original QSSTV features are still available. See the README.md for details.

Changes versus upstream QSSTV 9.5.11

Platforms

• Windows (64-bit, 10 1809 or later, or 11)
• Linux AppImage (x86_64/arm64 - Ubuntu 24.04, Fedora 39 or similar and later)
• macOS (macOS 15 or later, Intel or Apple Silicon, should work but untested. No hardware.)

New Features

• Sample-rate calibration - from WWV time ticks, NTP, or a reference SSTV station
• Decode SSTV from audio files - (WAV, MP3, FLAC, OGG, AAC), from the GUI (*File > Decode SSTV From File...*) at about 10x real time, or from the command line with `qsstv-experimental --batch`
• New SSTV modes - *JB60*, a ~61 s 640*496 color mode (still in development), and *PD120W*, a 16:9 widescreen PD120
• Stitched grid images - transmit pictures as 1x2, 2x1 or 2x2 grids on the higher resolution SSTV modes and DRM
• Pan/Zoom images for transmission - Place images exactly how you want them in-frame (and in grids) before transmission
• Gallery multi-select - to delete or send several images to TX, with the Del key for quick deletion
• WebP, AVIF and HEIC support
• Image viewer zoom and pan
• Clipboard support - copy (anywhere)/paste into the transmit window or TX stock
• ADIF logbook broadcast over UDP - on every OS
• DRM Live size-slider preview - preview updates as the slider is dragged
• DRM Progressive Image Reception - Image previews as you receive, improving in quality over time
• Follows Desktop Themes

See the GitHub for ALL the changes.

BIG Thank you to WA8LMF, KC8LOQ, and KF8GTK for lots and lots of testing.

Have fun! I did.

Jay NT0Y

https://github.com/jbdubbs/QSSTV-Experimental

At first I was going to use off-the-shelf GaN switches and drivers, but I'm worried that the drivers wouldn't be able to handle switching that quickly and precisely. (To operate in Class E at 6m, the full cycle is on the order of 10 ns, and I was hoping for hitting 2m, 1.25m, and 70cm, which would likely require the devices to switch in tenths of nanoseconds.)

Yet at the same time, the QMX is able to transmit at 6m using regular old MOSFETs and discrete logic, according to the schematic. I figured that a GaN with an integrated driver that doesn't have to fight PCB trace parasitics would be able to switch a whole lot faster, and they're only about $7 a pop even in small runs, but the datasheets I looked at have hundreds of ns of latency and are intended for switching frequencies below the 50 MHz required to hit 6m.

(As for why I'm doing this: [WA1QIX](https://classeradio.com/)'s polar amplifier can't hit frequencies that high, and the QMX+ is 5W max.)

Hello Dear HamRadio operators,

I would like to invite all of you to come see and test my new platform. www.dxrank.net

I built it around a permanent and temporary performance based ranking system that gives points to each QSO made based on many factors, that mostly indicate how difficult/unique that QSO was, like how wide the bandwidth, analogic vs digital modes, what distance, how was the band condition and more.
The all time rank, is permanent and always attached to one callsign. The temporary rank is based on a time filter: 30min, 1 day etc. and shows you the best operators of that time frame.

Every rank is awarded a visual rank badge for easy identification and recognition.

And it's just the start.

The Live QSO map is a live world map, interactive based for all live-real time incoming qsos, where you can filter, select and see callsign locations and more.

Currently the live QSO are derived from online logging platforms but not only, see below.

Alongside that there are various graphs that show you the current QSO rate inbound.

After that i created also a user menu, with useful tools for various tasks.

The ADIF Score let's you merge your existing adi record to the platform, so even if you don't log QSO online automatically, you can still update the platform manually similar to QRZ.com, the eligible qso from 12 Oct 2026 onward will be merged to you rank and points.

Additionally i have prepared Pro Tools access, some of which are ready like the ADIF PRO tool, which is based on a previous program of mine, basically is the master ADI analysis tool, where you can pull precise stats and graphs of your radio activity, export to cabrillo, PDF reports and more.

There is a lot more on the platform that i can explain here, i invite you to come over and enjoy it, is absolutely all free and ads and spam free. With exception for the pro tools access in the future.

Come over and let me know your thoughts. 73

Marco

Good morning- been attempting to wire the business end of a Radiodan rbi-1 keying buffer interface to a Texas Star 350HDV. Have allready put a custom entry point for it with RCA jack (female) mounted to the backplate with + and - wiring out the back of the jack. I believe the -should wire direct to the spot where main -black goes to the pad of the unit if not I have a chassis self tap screw to mount it to. I know for the positive+ it's where the keying sniffer transistor is. which is the one closest to the backplate. But online info is sketchy and confusing, as I've read contradicting advice to solder to the emitter. also the base, hell, even one that said the collector. And so do they mean removing the transistor entirely? Therefore solder this +wire to the spots where the transistor would have been, or transistor points having some of the 3 legs up in the air while other leg(a) to the board with the + soldered to the leg? Any legit knowledge lent on this subject would be very helpful and I appreciate it in advance. I did have an elmer I could turn to but, unfortunately he passed away becoming a silent key about a year ago, he'd been a licensed operator since 1959 and made many contributions to the hobby so he always told me if I couldn't find him, this would be the next best place to try. Again I appreciate you all in advance with your time. Respectfully-Adam

I just got this project AL811H from a buddy of mine, It's been converted to 572 tubes and has a long list of upgrades.

Looking at it so far, it has the step start upgrade, grid overload protection and front panel ALC mod.

It looks like it just needs tubes, a parasitic suppressor harness, setup, and maybe an RF interconnect braid wire.

Can't wait to get it fixed up and get on the air.

Hi, im after some advice, im currently studying for my intimidate license in the UK.

I am looking to upgrade from a g90 to an ftdx 10 and im wondering if this psu will be suitable for up to 100w.

It is listed as 20 amp continuous and 30 amp surge.

Tia 😊

NOT POSSIBLE 😂

When you bring home a piece of gear that spent years transmitting inside ARRL headquarters, you can’t help but wonder if it still remembers where it came from. This morning, the newest addition to the Box 324 Radio Club bench proved that radios have a funny way of finding their way back home.

Rewind to this past weekend at the Nutmeg Hamfest. We were walking the floor when we spotted our buddies John and Josh! We were on the hunt for a new full-power rig for the club and they had exactly what we were looking for: a clean, heavy-duty Icom IC-756PROII. But this wasn't just any hamfest find. Tucked into its pedigree was a legendary piece of Connecticut radio history—it was an official bulletin radio straight out of W1AW in Newington.

We talk a lot about the big-picture work the League does on the front lines: defending amateur spectrum, fighting legislative battles, and pushing the hobby forward. But their equipment surplus cycle deserves just as much credit. When the ARRL rotates out station gear at local hamfests, it creates a vital pipeline for grassroots clubs like ours. Running a small local club station means every penny counts, and getting access to proven, well-cared-for commercial gear is a genuine game-changer. Instead of gathering dust in a backroom, gear like this gets recycled right back into the community—anchoring a club shack, training operators, and standing ready for emergency communications.

We hauled the radio back to the station and got right to work. We set it up on the bench stacked with our Sky Toppower supply and a classic RIGblaster we scored at the fest. We connected the audio cables, and got the entire station wired up and playing nice.

We’ve been putting the rig through its paces under our club call, K1MFD, but the real highlight is captured in the clip above: scheduling and completing a contact straight back across the state to W1AW.

A former W1AW bulletin workhorse, picked up from the hamfest tables, wired onto our bench, and reaching right back out to talk to its old home station. You couldn’t design a more satisfying full-circle moment.

Club Page: https://www.facebook.com/K1MFD

Huge thanks to everyone involved. If you hear K1MFD out across the bands, throw your call into the mix—this radio has plenty of history left to make. 73!

I've got tired of hearing how "M17 does not sound as good as analog FM". Of course it does not, because it can't, due to technical reasons (speech compression). Can something be actually done to fix it while keeping the compatibility with the rest of the protocol intact? Sure - improve the speech synthesizer at the receiver end. I managed to train a FARGAN-like neural network and make Codec2 3200bps sound more natural. This is a part of M17 Project work, and more updates will follow. More details through the link below.

You can give the samples a listen here: https://m17project.org/2026/10/13/codec2-neural-enhancer-tests/

I have a TYT TH-7900 Dual Band. I can't seem to disable the "Dual Watch" feature on it. I have

(I thought) searched through the owners manual and can not find anywhere in the manual that explains how to disable Dual Watch.

I have a QYT Dual Band and I can disable the Dual watch feature on it. Folks...what am I missing here? I also can and have disabled Dual Watch on the HT's that I have. I have about come to the conclusion that the "DW" feature in the TYT TH-7900 is either "hid", or there is NO WAY that it can be disabled. It stays on permanently 😂... ANY help/suggestions would be GREATLY APPRECIATED 😃...

I am at the park set up on 20 meters now. Send me a chat if interested!

Got a RS-35a at a hamfest and a digital meter from Amazon. Need to put shunt inline w/ negative lead.
Q- do I move to leads off the small capacitors with the main lead off the negative post and move onto the shunt?

The design is created on a computer. A stamp is cut into a rubber-like material using a laser machine. The clay is stamped. Then comes the classic process - firing, glazing, and so on.

Hey Everyone,

I am pleased to say that I finally finished construction of the DIY Yagi Uda antenna I optimized in CST. I took the antenna to USU to have it tested on their satellite tracking ground station, and the antenna was able to capture a signal from a satellite overhead, which can be seen as the green blips on the signal waterfall images. The yagi uda antenna is currently being used as part of the SATNOGS network via the usu ground station, and the signals it is currently receiving can be seen by looking up the usu ground station on SATNOGS. I am grateful for the contributions from the University of Utah and USU for making this moment possible.

Just wondering, if any HAMS in here specialize in receiving communications with cubesats in low earth orbit, do you have any recommendations for what kind of information to look for in received signals?

Ok, I'm going to look dumb here because I am. I got my tech license about five years ago with the purpose of talking with a friend in a different state. However, he got part way through studying and never took the test, and then he died, so here I am. My current interest is basically prepping; if the world goes haywire enough that this is the only reliable way to communicate, a device for just that is I want. I may even have asked this same question a couple years ago. I'm 77, don't have the mental wherewithal to learn something complicated. I have enough trouble with a cell phone and in general refuse to do more than call and text with it. But I want reliability as well as ease of use. What are my choices, or should I just forget it and find another way?

I have an 8 gig RP5 that I would like to use as a hotspot. What do I need to do to achieve this? Any good step by step resources and what do I need to buy to get this working? Also can I use an Android tablet or phone to manage it?

So for some back ground I am very new to this whole field but also very interested.

I was recently given a Baofeng UV-5R with the hopes I could speak to people across the country, recently I’m understanding that the VHF/UHF doesn’t work as well as HF for long distance (1000+ kms) communication.

So I went searching around and seeing the price tags on some of these radios, so my question is 1 what transceivers are you using and 2 do you have a cheaper entry level radios for HF?

L'ho ritrovato in soffitta da mia madre poco più di un anno fa fermo dagli anni 90 , a giugno dell'anno scorso l'ho rimesso in attività costruendo un dipolo con del filo elettrico avanzato . Ebbene da lì è tornata la passione e a novembre 2025 ho dato l'esame da radioamatore. La settimana scorsa l'ho portato a sistemare un problema con il discriminatore FM ora è come nuovo e penso che lo terrò in auto .

What handheld transceiver should I get? I just got my technician license, and already have a uv-5r mini. I’m going to learn on the 5r mini, but want to have something better to upgrade to once I get good with the radio. I was looking at something like an Anytone at-d878uvii for my budget of about $200, it wasn’t sure if there was something better or what (For that budget).

Hey, I've been experiencing a bit of this at my current location and wondering if this is a propogation phenomenon or some local noise or something. For context we live at rural farm in BC Canada so noise is usually always around S0. Every once and a while I get this bizarre noise pattern across the bands (most prominently on 160m, 80m, 40m, and 6m). Never really encountered it before. (I've turned on the preamp to make it a bit more obvious looking on the screen).

Found this at an antique shop I work at. I have no idea if it works or not. I like old stuff and wouldn't otherwise get an SWR meter right now.

My mic cable just broke, so I had to improvise with a Cat5e Ethernet cable. It actually works.

I took it on air to test it, and got a 59 from 2 people!

So far, the Ethernet cable is working surprisingly well! I'll probably make a proper replacement eventually, but I wasn't expecting it to work this well!

Has anyone else done something like this?

73!