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indeed, follow the PCB wiring and check the continuity there, this is how I found the JP501 problem

On the QMX there is the T507 transformer which is I believe for SWR, not sure if it's the same on the QMX+ but I would check the solder joints on those and test continuity.

Chris, For what it is worth, I've put images of my QRP labs experiments under photos in this groups.io. Jumper JP501 also tricked my once. Also the jumpers below the GPS receiver are tricky, and I

Just a quick comment. The BNC WILL show as shorted with a multimeter since the meter is DC.? ( I learned that after cutting one of mine out before even first powering up. Jury rigged a BNCish dongle

Thanks for your help. Krzysztof

Set "Band limits" to "None". P.51 of the operation manual v.26 refers. gl de va3rr

Thank you all for the feedback. -Into a dummy load -SWR seems to get incrementally worse from 10m, and then it falls off bad - Haven’t got it running good enough to use with antenna -Jumper

Hi, I have a problem with precise tuning in the 60m band - how to fix it? Krzysztof, SQ9GIN

Is the jumper installed between the two center pads of JP501? Al, K2ZN

Does the QMX come with a microphone on Rev.4 or is that user supplied? I see the space on the board. My QMX+ has it supplied but I would like a QMX for a handheld on 10 and 15 . That would be really

Congratulations Hans! May there be many more replies here. Because you truly deserved this award. 73

Congratulations to you Hans!

Hi All, In anticipation of the eminent release of SSB by our resident C expert on the QMX, has anyone got a good design/circuit that we can all start working/building on for a PTT microphone, using

There is a drawback. If by some lucy coincidence you come up with the same receipe, you will be free to produce your own drink, under your own brand, thah will be tasting like the coke. And since

Hi Sandy, I’m in the same boat. I’ve got dozens of earbuds, IEMs, phone buds, space buds you name it. Sony, Etymotic, CCrane, Panasonic, JBL, Radio Shack, Apple (with the 3.5mm plug), Bose, and I

Do you have a licence to operate this equipment ?

Hans, you are the very definition of innovator.? Well deserved! -- Cheers, Chuck

I'm sorry if this comes off sounding bad, but all of the issues you've brought forward are your personal issues and not QRP-Labs' - The printing and wifi issues, the small components, your patience.

I haven't seen much posted about this subject so I thought I might save someone some time and money. After trying many varieties of ear bud headphones these have worked the best for me for use in the

Hi Chris, Sorry if this was obvious but you need to connect a good load to the antenna socket to run the diagnostics. It looks like your running with nothing connnected? else you have a problem with