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Qrpguys has a kit that should work. I ordered one to try it out. https://qrpguys.com/electret-ptt-microphone Dennis KK5DB

Thank you, Erik and Adam both. ?Ordered one and look forward to adding it to my QMX go-kit! -Franz N3HFS

Thanks Adam. I'm just trying to make it easy for more people to enjoy the SSB upgrade.. And you made a great little mic case. Erik

Hey Chris, That is exactly what I'm thinking.? I think, that should work nicely. Thanks for posting the diagram. Cheers. Mel. M0KMD.

You want the version for the (tr)uSDK and uSDX (if you download this now, it will also list the QMX which makes it much easier to pick the correct one). -- Karl Heinz - K5KHK

I am running USB IMD Sync optimization on another QMX - this time I had my headphones plugged in. While it is running the optimization, on some bands I hear the two-tone IMD signal, but on most bands

Hans, I started the calibration process on the original beta .000, about half way through it popped one of the finals and crowbarred my power supply. I changed all 4 mosfets and updated to .002.

I built a 9V midband QMX, basically everything works fine and all hardware tests are good, and I used it already for some SOTA activations. Now I want to tweak it a little, as the power output is good

Spanks. 73 -- Matt N3AR

Matt, from the beta firmware download page: *Microphone Connection:* The microphone is plugged into the QMX Paddle port; this stereo 3.5mm jack plug is for both the microphone signal AND the PTT

Adam has a few different wiring configurations listed for the mic; which one has been found to work with the QMX? Thanks. 73 -- Matt N3AR

I started using ChipQuik brand liquid flux for rework? and have been very happy with it.? I had been using up an older supply of Radio Shack brand solder wick and it performed better with a drop or

I’m not brave enough to download the SSB software yet, but would like to say how much I am enjoying reading posts of the group experiences and community debugging of the releases. And it is so

Dave, Make sure that in the band configuration menu that you have PTT Grounded ENABLED if your amplifier needs a pulled down PTT signal.? Default is a +5V output upon transmit.? ?PTT output is on

While my license does not allow for "commercial" sales, I can clearly see that this is not a money making venture and is instead simply a favor to other hams. Consider this approval to proceed.

Hans, It is looking very good SSB on the QMX+. How do you configure the PTT Out to go LOW to key a conventional linear amplifier?? At 5W it should drive my RFKIT RF2K-S to 200W on the standard

I just made one of these for my QMX+: https://www.printables.com/model/320559-mini-microphone-for-qmx-trusdx-usdx-kx2-and-kx3?lang=pl I have the parts on hand to make 9 more if anyone is interested.

Greg, not exactly. But like in your situation the voltage was wrong (away from 2.5 V) when IC402 was connected and different but also wrong when IC402 was separated from T401.

I installed Firmware beta 1_01_002 on my high band QMX. In putty I started Optimization and after less then a minute putty became unresponsive. I exited putty and disconnected power from the QMX. I

Well, crisis averted! ?It was a power bank issue the whole time—the most likely cause based on my situation. ?I was able to reset my power bank (a feature I didn’t realize it could do until I