QRPLabs@groups.io

QCX mini 20M no output, can't adjust IQ,lo and hi. 17 #qcx20mini #qcxmini #alignment

Yes i supplying 12vdc to the radio. I'll try to check the solder again. will watch the video and try to follow the troubleshoot it. De 9M2KLH

By Khor Lai Hock ·

#qcx20mini #qcxmini #alignment

QCX Mini Alignment Issues 6 #qcx20mini

Hi Dave. I had the same problem - it turned out to be a faulty op amp IC7. Checking voltages around ICs 6 and7 could be useful for you, although I'd check T1 carefully first.. Allison's advice is of c

By Rod Smith ·

#qcx20mini

QCX mini stopped working shortly after build 2 #qcx20mini

Hi L6 feeds +5v to pin 7 mcu ic but has c47 and c3 as decoupling to ground. If L6 is oc check for shorts/ on vcc rail to micro that rail had to be drawing excess current for some reason Ie short or ov

By mick baldwin ·

#qcx20mini

#40m #problem #qcx20mini NO TX Power 8 #40m #problem #qcx20mini

That was it; replacing C29 fixed it. Thanks again for the suggestions. The radio worked long enough for me to listen, transmit and get picked up by RBN. Then I plugged in the 50W amp and developed a l

By john.rogers@... ·

#40m #problem #qcx20mini

Interesting first WSPR experience 4 #qcx20mini

I'm glad you figured it out Dan! Dans rule!

By Daniel Conklin ·

#qcx20mini

and another QCX mini! 2 #qcx20mini

I've just tweaked my QCX20 mini referring to Hans' "tune up" video. Just spreading L3 and a tiny bit on L4 took me from 3W at 12v to 4.4W into a QCX dummy load. With no No turns removed, outputting 5.

By Ted 2E0THH ·

#qcx20mini