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May not be a problem in this case, but I'd recommend at least an alligator clip jumper to keep the grounds connected while unplugging the front panel. Generally, if the ground pins disconnect before

Jerry Gaffke via groups.io <jgaffke@...> wrote: Thanks! It works now, but if my QMX ever stops booting, this will be what I'll check first. It's very hot, but didn't bang yet. I'm

I built my 9V 60-15 last weekend.? To troubleshoot it I would leave the display board off and start it up with the control board.? After I established Terminal App connection I would pop the control

Thank you for your reply Roger. Yes I? press enter and can see the diagnostics screen,? but when I try to change bands it does exactly as described in the original post. To exit the diagnostics

Gabe KO6EQN via groups.io <ggsubs@...> wrote: Which radio are you referring to?

Chris G7LQX via groups.io <mornymorny@...> wrote: I set the sidetone to absolute, volume to one step above muted, and if there's still noise, lower the gain with my

Donald Adams via groups.io <djadams42@...> wrote: Yes. Yes. Is +12V (after power switch) present? Well, in your case it will be +9V, but the line is still labeled +12V...

Is it OK to apply power to a QMX when the LCD and Controls Boards are removed? If so,? is it then OK to turn on the VDD supply by manually grounding the PWR_ON line at the input connector of PCB

A lot of these properties also depend upon the levels of various impurities being low. 73, Don N2VGU

Ok Stan thats useful to know, save me banging my head on the bench !! Yes the low pass response on 6m is well down. 73 Hugh GM8FXD

Nick, I thought 160m receive wouldn't yet work correctly? TX should work, but IIRC the image sweeps will NOT be correct. See: /g/QRPLabs/topic/107754303 (

Thanks for the feedback Nick, I'm pretty sure I've done those continuity checks but I will look again around L401/C401 tomorrow. 73 Hugh GM8FXD

Hello again, last time I thought that the problem might be in the new generation cables with PD support, so I bought 3 different brands of type-C to type-A cables with data transfer feature and

The image and i/q response is due to a firmware issue.? It can be ignored for now (yes on the qmx and qmx+, they both use the same firmware). Your power out on 6m is very low.? If that band is

Same here 2 different QMX+'s Ian G4GIR

Thomas,? the extra 0.03 won't make any difference. Regarding the enamel, there are several kinds. Some are designed to burn off with a very hot iron.? Some are designed for high temperature,? and

Nothing wrong with the "Chinese" part of it. Most of the home electronics bought in the US is from China, including some very high end equipment. There's thin and thick solder available in any market,

Could this problem be the board? is so old (Rev 3a) that the Win 10 drivers are too new? I plugged in all my radios including QMX+ and QCU shack clock. All showed on Device Manager so no change

Hi Hans, Thank you for your reply. Initially I tried both lower and higher AGC thresholds, and found they did not help the situation. OFF seemed to do the best at eliminating the noise modulation

Hi Group, Hans has meanwhile exchanged 0.60mm wire by 0.33mm wire in many kits (same or better performance). As I have an "old" Rev 1 QMX here to build I had the idea buying 0.33mm wire as it's much