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Make sure you have the LCD contrast fully anti clockwise. -- Colin - K6JTH http://tangokeys.com

Hello Jeff, I don't have a QDX for 6m, but I modified the QCX MINI to work on 6m, it has been transmitting 24h24 in WSPR mode for more than a year, it has 3W output, I think u. QDX can be modified

Hi All. I have recently sold the rig I used to have running 6m FT8 to monitor for openings. Was wondering if there is anybody that has a QDX set-up and running on 6m? Would love to connect to

Michael, If the buttons and the right encoder don't respond , check the ground connection to the control board, the upper left pin ( or either of the button contacts near the top edge).? Also be sure

Gunnar, If this was a high voltage HW/SW glitch, you should ?have fried the whole 5 V bus, or at least IC402/403. My similar failure occurred at 13+ V but did not take out the 5 V bus, so I don't

I've obtained some spectrum analyser images of the output from my QMX running at 12.5V.? This is in preparation for fitting Zeners so we can check before and after.? This is the before. Is this the

Gunnar, I am beginning to think that C107 has too low a rating (6.3 V), and it will occasionally self destruct for no apparent reason. Unfortunately, there isn't a lot of room for alternative

Garrett, It still makes on sense to me that you have continuity between B1 & B2, but B2 shows 10 ohms to the A points and B1 does not. Try swapping your probes around and see if that changes

Thanks Alan I will take a peek today when I have time. I'll let you know in a few days. Regards 73 James

Hi, can anyone suggest where to go next please. Connect power, no current draw. press on button PC sees QMX current draw approx 160ma, load software and LCD lights up with splash screen (software

Hi Gunnar I noticed that C107 was getting warm at a supply voltage of 6v, and that D108 ceased working as a zener. C107 is only rated at 6.3v according to the parts list...which is OK til something

That reminds me, Dell computers run a service "Waves Audio Services" that should be disabled. I'm not sure it has affected me but some users of WSJT-X have reported problems. There was also another

Hi. Can someone tell me if I can use an AVAGO encoder type HRPG-ASCA #51R in place of the supplied encoder with this kit.

Wsjtx does however at least show what is being sent and received in two places other than the screen. In the UDP data stream, and logged in the all.txt file. What I managed to do for my experiment is

John, I expect these settings satisfy 95% of Windows users. Radio Hams need to turn off all audio "enhancements" when they start using a Windows computer. 73 Alan G4ZFQ

Late posting this, but want to complete the story. Turned out my transmit issues were due to some "automatic" attenuation that defaults on Windows 10 and 11. Here is Paul Jorgenson's excellent post

Well... I just finished my second QMX, the first one was toasted by increasing the supply voltage from 6V to 12V wiith a ramp-up time of 3milliseconds. The full story is here:

Chris, But if the wires are in the wrong holes reception could be zero. 73 Alan G4ZFQ

Maybe a better description. What version QDX? L4?? are you sure? Terminal shows only 80m, do a reset? WSJT works? RX and TX? All bands? USB sketchy? How? D1, 4 shorted? Seems unlikely. 73 Alan

James Q6 failure has been reported, possibly static from antenna. Or, a bad joint showing up. 73 Alan G4ZFQ