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QMX 1_00_027 firmware WSJT-X would not work with the choice of the QMX as the transceiver. Kenwood 480 did work. CAT button works. I did select the QMX sound input and output in Ubuntu on my Dell. WSJT-X was set to full power as was the Ubuntu sound output. On TX there was a full bar under the A in the QMX display. The QMX was set to digital mode. I called CQ on 20 m, which was active at the time and also tried to answer CQs to no avail. I was using my EFHW in my shack. I have worked 131 countries with it and a Icom 7300. I thought maybe I might have blown my finals in some way. I connected to the QMX with Putty and went to the Hardware Test section. With supply voltage of 11.3V I tested every band by pressing the T key on my keyboard for TX and have the following results. A dummy load was attached. 15m 5.2w 17m 4.2w 20m 4.7w 30m 4.1w 40m 4.4w 60m 5.1w Since I have output on all bands with this test, I assume I didn't blow the finals. The QMX seems okay and I should just keep trying with WSJT-X. I do have a question about the display above. The status of the 3.3v SMPS says "SMPS" while the status of the 5v SMPS says "OK." Should the 3.3v status also say "OK?"

Hey everyone, I recently bought a ready-assembled QMX after my DIY attempt didn’t quite work out (let’s call it a “successful failure” ?). Funny enough, I had no issues building the QMX+, QDX, or even the QCX Mini before. With the assembled QMX, I’m getting a continuous tone every 700Hz on the 40M, 17M, and 15M bands. All the other bands are working fine. Here’s what I’ve tried so far: Factory reset Upgraded to the latest beta firmware Tested with different batteries and power supplies Swapped USB cables Connected to both a laptop and an iPad running iFTX One key observation: these unwanted tones only appear when an antenna or dummy load is connected. Without any load, the issue disappears. That makes me lean toward a hardware issue—maybe something in the PA section or related to RF feedback. I’m attaching some test results in case anyone spots something I may have missed. The timeslots on the JTDX without noise is when I disconnected the dummy load. Any thoughts, suggestions, or similar experiences would be greatly appreciated! Thanks in advance! DL7EDU - LU5VQV

I just wanted to activate JS8 and cont get it to transmit. WSJT-x is working so basically I would thing the setting is ok JS8 is decoding so that looks ok as well i tried to play with modes with no change. Any Ideas ? Martin DK3UW

Hi All, I just recently finished my QMX mid band kit and on powering up, my computer does not see any usb device. I have tried a computer running Windows 10 and another running Linux. I have tried multiple combinations of plugging or having the device unplugged before power on. I have been using a voltage and current limiter with a battery pictured below, limiting voltage to 7V then 9V (to see if that would make a difference) and limiting current to 250 mA. In the pictures, you can see the device off then when I turn it on, the V out goes down slightly and there is a 170 mA current draw. Thanks all for any suggestions, Andrew

Hi Everyone, I have a QCX mini that has been working perfect for the past 2 years. With all the QMX SSB developments, I have not powered it up for quite some time. Today, however, I decided to give it a spin. If you look at the picture, I encircled the lost lines on the LCD (1 horizontal and 1 vertical). The radio works perfect. What I have done: 1. Factory reset the radio - did not fix it. 2. Reflowed all the connection from the LCD sister board as well as the connectors on the main board - made no difference. So before I start really stripping things, have anyone else experienced this and what was the solution. 73 ZR6TM Timo