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Hi all SSB firmware was released into beta on 17-Mar-2025 after 9+ months of development. Many thanks to everyone who bravely helped test it and patiently provided their feedback and observations. There are now quite a few YouTube videos, forum reports and other social media mentions about on-air successes with QMX SSB. Now that it has been at least 6 weeks in beta and I believe most of the issues have been resolved, it's time to promote it to an official version. I have called this version 1_02_000 and published it on the QMX page http://qrp-labs.com/qmx where I have also published the updated operating manual, which grew from 111 pages to 134 pages. The main changes are: SSB (obviously!) including CESSB, TX Equalization, Mic AGC, VOX, Pre-distortion and and and... Addition of up to two more USB Virtual COM serial ports (up to three total). All of the hardware tests such as RF and SWR sweep, and Diagnostics, are now available on the LCD too. New CAT commands for LCD contents, S-meter, AGC-meter, Power meter, SWR meter, SSB source Complete list (relative to 1_00_027 the previous official version): SSB modes added (USB and LCB), with CESSB, TX Equalization, Mic AGC, VOX, Phase pre-distortion and more Rationalization of menus, grouped into CW, Digi and SSB submenus (now Keyer and Decoder are submenus of CW) Added up to two more USB Virtual COM serial ports (configurable) LCD versions of AF, RF, Image, LPF, Test ADC I/Q sweeps (miniature graph on LCD) New function PA mod. test to check operation of amplitude modulator Diagnostics screens are now available on the LCD interface too Now remembers previous menu location on ALL menus regardless of nesting level Add way of forcing factory reset, press Menu (left) button during power-up Change TX color in diagnostics screen from red to blue, to avoid confusion since red things are errors Added CAT LC command to retrieve LCD contents Added CAT commands SA (AGC meter), SM (S meter), PC (Power meter), SW (SWR meter) Added CAT command SS (get/set SSB input source) Bug fix: PTT P did not work properly Bug fix: Incorrect PA voltage display on the Diagnostics screen 73 Hans G0UPL http://qrp-labs.com https://www.buymeacoffee.com/g0upl

Hi, I have released a version 1.2 of the solution. Please refer to the readme front page file at the git repository with details: https://github.com/AC8L/QMX_Plus_Autotuner_Internal_Battery_Speaker/ While I am writing this note - a group buy with 35+ participants is happening for this same version 1.2 - organized by Cal (AD8Q) and Stan (KC7XE). -- 73, Sardar (AC8L, 4K6SA, VA3DUA).

I purchased the development kit with my QMX+ because I thought maybe I'd install a tuner. I did and although I can't drill a hole in the right location to save my life, out of laziness for sure, I was able to do it this way. I decided not to make it totally internal as I run an amplifier sometimes. This way, it's just a tuner that uses internal power so it comes on with the radio. Pretty handy, too. It works just like I hoped and it's one less thing I have to pack. Given the choice of an internal power source or this, personally, I think this is more convenient. It make look trashy but I also added a high quality speaker. The holes looked fine but given the conditions I will likely use the radio in, I decided to keep dirt out. 73 Frank

While building my QCX mini, I damaged my R47 variable resistor while trying to remove it, because I forgot to cut off the feet before soldering it in. I finished the rest of the build a few days ago, and discovered when I powered it on that the display contrast was set well enough that I could use it before the potentiometer came in. However, while I was unplugging a paddle, the screen suddenly went blank and hasn't displayed anything since, even after installing the replacement potentiometer today. I suppose it's possible I shorted something with my finger? I have an enclosure on the way to prevent further incidents, if so. After reading through the manual, I decided to take a reading on the pins of the display module, and they don't match very well with the expected values. With R47 turned 50%, the voltages I read on pins 1-16, respectively, were: 0, 4.7, 1.5, 0.1, 0, 0, 4.7, 4.7, 4.7, 4.7, 2.6, 1.8, 4.7, 4.7, 4.4, 0. I'm not sure if that's useful information or enough to help you debug it, but I'm happy to provide further detail or information you might need to help me get this fully working. While the screen was working, I was able to get it set up and tuned, and listened in on a few frequencies and it seemed to be working fine. TU es 73 de W5JIA

Howdy all, I finally was able to get the QMX on the air last night since having it for over several months now. Mine is setup for 9v and I’m using a wall wart tO power it at the moment. It worked well on CW, making a nice contact and qso to KS from NV, and then several Digi contacts to China, Argentina, NV, Japan and New Zealand, using the iPhone iFTx app. I didn’t see any output from anything in the screen but still need to play with the settings. Thanks Hans for a great little rig. -- Jason- Wv3v Las Vegas, NV.

When Elecraft introduced the KH1 a year ago, I was immediately enthusiastic about the concept. A small and lightweight shortwave radio with an integrated telescopic antenna. This means that, weighing less than 400g, it can be used in any suitable location on shortwave. So I wanted to build something myself. I immediately began my own experiments with telescopic antennas for 7-30 MHz. This confirmed that a counterweight is absolutely necessary. This wire, which is a quarter of the wavelength long, contributes significantly to the radiated energy. So the idea arose to forgo the telescopic antenna and experiment with end-fed wires twice the length. Of course, it makes sense to stretch the wire as high as possible. But I also got respectable reports with EFHW lying on the ground or in bushes. In this place the antenna may detunes itself, so a tuner is necessary, as well as the standard 1:64 transformer (Unun). The tried-and-tested resonance circuit (Fuchs Kreis) performs both tasks. Once the antenna issue was resolved, QRP Labs brought out the QMX. The ideal TRX for my projects, and now even capable of SSB. Now all that was missing was a suitable housing with an integrated battery and a speaker with an amplifier. Then a paddle for CW as a contactless touch key directly on the device. And the QMX Carrot was finished. But it wasn’t that simple, because everything had to be as small and light as possible. It now weighs 340g and measures 15x8.5x3.0 cm. I’m happy with that. 73 Chris https://youtu.be/0kksiWVOtnQ