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Good to hear that it's at least technically possible in some way... Yes, was hoping it might be, with "just" a firmware update ( I don't mean to minimize the work involved in creating a new firmware

Hey Cal - Tried to look you up via QRZ to ask you a question about the AT-100M. Here it is: For Function #10 "Calibration" what setting do you use for 20W radios such as the Xeigu G90 or FX-4CR? It's

Ok great. Thanks for the quick answer.

ALL: If I have any question regarding the Zin(fRX - fLO) characteristics, it is more on how we can take advantage of it. If that function is a steep concave, particularly at lower fLO like 3 to 10MHz

I have considered removing them as a last try. I've used them in my QDXs, but there was room to build a much beefier heat sink there. Also, as I've said before, with the number of dying BS170s I've

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