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I have not done any jumper troubleshooting yet.? Until I figure out where the jumper should go in the first place, I'm still status quo here. If someone could tell me where the jumper should go to

Let me look at the build manual.? Can you explain where I would be putting the jumper?? This is a 20-80m QDX.

Check for shorts on the red circles areas - see attachment -Steve K1RF

Correct is "no wire" for 80-20m.

The terminal shows a monoband QDX configuration. *Important:* Was the jumper wire for the band configuration in the correct position *during* the software installation? 73 Reiner

Greg, sorry to read about the damage. But you could check now the gate waveforms without working BS170. (Of course the gate capacity is "working".) Now there is no possible feedback from drain current

Rick, I use a TalentCell YB1203000 LiIon battery. It puts out 12V when fully charged. It's the same size as the original QMX. It even comes with a cable that fits the QMX. And it lasts for many

Hi Rick, 1. A fully charged 12V LiFePo4 pack has a voltage of about 14V which might be too much for a QMX(+) when the SWR is too high (although I've powered my QMX with the exact same setup in the

Hi Ludwig.? Thank you for the analysis.? To answer your first 3 questions: The GND lead was clipped to the bnc output connector The ground lead is approx 150mm The original BS170's are in

Hi all, I’m new here, so forgive me if this has bern hashed. I have a 12V QMX+ and want to get a battery for portable operations. I asked this question on the Facebook group and ?got responses

FT8 with FT8CN Peter HB9EBE

QCX-Mini?

FT8 with iFTX

Still working on my 3.3V SMPS.? Maybe I see the real cause now. Resistance from the + side of C106 to the cathode side of D107 240k in one direction, 60K in the other direction.? ?The resistance

To Warren and Mike and anyone else who may be able to help. I changed the bpf config for 40m from 3 to 2.? The noise level dropped substantially, but i still do not hear 40m signals. I then took a

My QMX+ is working in transmit now fine with help from Jeffrey:) However the receiver is still dead. Turn on my QMX+ and I get noise, and it fades out within a few seconds! Just ordered two

https://www.amazon.com/TalentCell-LiFePO4-Battery-Rechargeable-Phosphate/dp/B07YRZYLKV?ref_=ast_sto_dp (

Hi Tom, I had this happen once. I strongly suspect a firmware bug. ?This is how I got around it: 1) install a jumper for one of the mono and bands. 2) boot up and do a factory reset 3) shutdown and

I had order my QMX back on January 22.? The QMX changed configuration from the low bands to the mid range and then the QMX+ was introduced.? Hans has been great in accommodating me through each

Hans, you are not kidding! I did not have any problem with the QMX compared with the QMX+ ! I even cut off leads BEFORE soldering the caps. Will have to take another turn on the soldering iron temp