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It's interesting that you had Q104 burnt. That transistor probably never see more than 15 micro amps flowing through the drain unless something else happened, but then it's also not likely that the

Hi Rich, The power supply is an "Abrecht SW 57". The power supply was already switched on and was simultaneously supplying a 20m QCX. I then connected the QMX to the antenna (1:9 EFRW via a tuner)

Sorry about your radio.? I know it's a big investment in time and effort.? And while relatively inexpensive, it's not free either. That's a lot of damage.? But maybe we can all learn something

Grant , I just looked at your Rx spots and they are very low in QRG, I think your dial setting or calibration of the QDX is out 73 Ross EX0AA 6

Grant, Are you on Windows or Linux? Timing is often a main reason WSPR is not decoded. An indicator that you computer is set to the right time is the DT value in the 3rd column of spot decodes in

Thanks Jeff and Bojan. I found the cause of the short. The builder repaired what was thought to be a ?broken trace on top of the board, below one of the regulator boards but this caused a short to

Any QCX R2 enclosures available?? ?I have a R2 that would like one.? Apparently the new enclosures are for R3 and above. Or, would a R3 enclosure work, just have an empty hole? TNX Bob WA1EDJ

You will probably have to log in to your account and dig awhile to see if it has shipped. For some reason emails from QRP Labs get rejected by many email services and don’t be surprised or insulted

OK I have read enough about the QMX, im putting mine in a box labelled " I should have Known better".Maybe when some information on fault finding becomes available I will give it another go. SMPS

Alan, I tried typing in the "band" combo box on the main screen. It showed the correct frequency, but turned everything RED and the radio frequency did not change. Then I went to >File >Settings and

Just an "educated" guess since I don't have one, but microprocessors can't measure higher voltages directly. Since you know the voltage is not that high, I suggest you look at the resistors that make

I don't have any significant results from experimentation since a few days ago, but I'd like to post some negative results just so that we won't waste time looking into non-issue factors. I wanted to

Oh my god... today I tried to turn on my QMX as usual, but it wouldn't turn on. At that moment a “not so good smell” came from the qmx -.- I noticed that Q104 was burned out, but the STM CPU,

I agree with Hans on this topic completely. The interaction of LPF and BPF can be very frustrating, but the question is not whether it is acceptable to bypass BPF for some users, but instead how best

Or the start time is wrong .set to start on an odd minute perhaps? Roger 8P6RX ?Get BlueMail for Android ?

Hi, it seems like nothing is coming out during the TX session (ENABLE TX?) or the TX frequency is wrong. 73 Bojan S53DZ

It'll be worth the wait, OM. Good luck with the build! Use the delay to read the assembly manual - at least twice :-)

Timothy, That's a nice circuit.? Another possibility is to pick up a small Astron power supply at a hamfest such as an Astron RS-12A ad modify it for variable voltage output and even variable current

To share a success story Probably only one in 1,000 but my just built rcvr kit did not work on first power up At 82, sight, solder and fine motor skills etc, etc ... So first thought ... problem

I had the exact same experience, VOL encoder failure but working QMX.? I suspect there is a failure rate of the encoders that is not insignificant.? I noticed Hans is selling the encoders separately