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The USB-C jack may create an issue and there will be no mic hole. Nothin a dremel can't solve. -mike/w1mt

I happen to have an extra QCX mini enclosure. If I order a QMX will it physically fit in the mini enclosure, understanding that the silkscreening probably differs? Thanks, Brent WB9UXN

All, Well now there's a thing. Rx is now fine - original fault ???? Tx, is FUBAR! I know why but not why. In Rx there is a nice signal on the Clk0 & Clk1 lines at the Rx frequency and they are 90

JZ, I totally understand your concern, but as far as I'm concerned, that is a non-issue until it is proven to be a problem. It is probably a minor factor in the mess, but it is not the dominant factor

QRP Labs ordering web page still shows QDX boards ran out and we are waiting on a new batch; your order will not be shipped until around 11-Sep-2023 (estimated). I have not been following the

Hi Evan, The BPF plots do a fine job of assessing receiver sensitivity at any given frequency. That is exactly how they work, and that is very helpful in providing feedback to the builder that he has

Evan - thanks - replies interleaved - it is a Rev 2 board Just seen that in the trouble shooting guide DOH! :-) 0.08 - 0.12 W i.e. 80 - 120 mW Very not OK, the 'new one' is ~ 5 W each band (sl.

Thanks for the tips. According to the diagnostics, the BIAS SMPS is fine, even though the output signal then becomes poor. I need to get some cold spray or something for further tests. Apart from

The minimum requirements for FST4W to be useful is a nice clean signal, the Si5351 is capable of this. As you realise frequency stability is also required, FST4W decoders do not allow for much

I sent my QMX to Jeff W1NC for repair but unfortunately I managed to blow the CPU because of lousy soldering.? He is very professional and quick so if you need any QRP Labs gear repaired give him a

I noticed that L509 is a 47uH inductor. Depending on the particular inductor model, the winding capacitance is usually on the order of a few picofarads, and the self resonance frequency can be as low

FWIW, my QMX volume encoder was faulty and had to be replaced.? The best way to confirm the functioning of the encoders is thru the terminal program and go to the hardware tab.? There you can

Hi Matthias, Mike stated that the left encoder should work, although the volume operation could be improved (Hans - maybe implement a log taper in software like most audio resistors use).? I had

Thanks, Cliff, your pictures are perfect. I still suspect poor heat removal from the BS170s.? Can't prove it from here in Michigan though. If you decide to eliminate the sockets in the future, I

Wow, I need *NOT* to use my iPhone to respond to this list server.? Sorry for all of the typos. The message should have been: 175 ma seems high. ?I would remove the 4 BS170s and see if the current

Push button should work fine. If you're having problems with double clicks then change the double click number to 500 in the menu (the default is 300). If you're having other problems with the push

Hi Nick, The T button in the terminal transmitter test is a push button.? You need to hold it in to keep the transmitter on. When doing the transmitter test, what output do you get?? This would

Gyula, Thank you for your kind words. I used the same sockets on both of my QDX rigs, but built a bigger heat sink because there was more space. See my AE5ZA/QRP QRZ page for a picture. Haven't lost

Just built a QMX successfully. The Qdx part of the tcvr works, ie. FT8. But for CW its still useless. The Volume Control is unusable. As well as the push button function. Its not working reliable.

Hi Everyone, Is there any possibility that a future fw for the u3s could support FST4W beacons? Perhaps with the GSPDO it would have the clock stability to be a pretty nice little FST4W beacon,