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Anyone have Erik's Callsign or email address TerryNichols K8TDN

If you are in the US, you may consider sending it to Jeff W1NC who can replace the processor for you, and do other repairs. His info is good on qrz.com, and is very highly regarded for his services to

Yes, they are for a hardware mod to use the PTT out connector as an additional serial control/status port for the QMX processor. You remove the transistors Q203/Q204 and connect those two solder

I did power it initially with a 12v regulated power supply at first, and current no limited by the power supply. Been running around so much I forgot not to go over 12v. 12v power source connected

I was qrv from POTA NL-0252 at the time. OH8TX 1240 utc in my log using qcx20 + efhw. 72, Carel PA0CMU

Roy, If you are talking about the internal mic, then yes, install it because it's being used as part of the noise cancelling circuit. -- 73, Dan - W2DLC

I would first test the mics you get.? I also got a mic kit from Eric, and the mic element in it performs very well, with good snr, sensitivity and dynamic range.? But they are very inexpensive mic

Depends on the board. QRPLabs kits use through-plated holes in their board fab, as do most other kits.? In this case, you should solder on whichever side of the board is most convenient,? usually

Using an auto tuner with a QMX at full output can damage the final transistors. As the T1 attempts to find a good swr your qmx will be subjected to high swr. If you use a lower voltage for tuning it

I've ordered two external mics that the forums show work with the QMX+ - from QRPGuys and from Erik AD7OV. Should I still install Han's mic or leave it uninstalled? Thanks, Roy de K2RMA

I've successfully have built many kits, but I always wondered.... I push the thru-the-the board component leads from the top of the board thru to the bottom of the board. I've always wondered, for

I think you mean Low Pass Filter toroids.? Changing the bandpass toroids will primarily affect receive sensitivity.? ?Adjusting LPF toroids will primarily affect output power and harmonic

I did a complete factory reset and re-entered all the information. I adjusted Sys. Frq. with settings from a spreadsheet i generated some time ago.? Those settings are not used when the GPS PPS is

Not being able to leave well enough alone I took one last stab at tweaking the band pass toroids. The biggest change came with the 20/17/15 meter coils. I gave up a bit on 15m to increase power on

My QMX+ with QLG3 also draws about 160 mA at 9V. As far as I can tell it is working ok. 73/72 John M0JBA wrote:

Thank you for the resource.

Yes. It's a classic tandem match. https://www.giangrandi.org/electronics/tandemmatch/tandemmatch.shtml 72 de va3rr

Please read this ( /g/QRPLabs/message/145820 ). For DC all is connected to GND.

Hello, I am hoping I could get some assistance. I am currently building a QMX. I just installed the SWR bridge and I have continuity between all the connections. Is this correct or was it only

Jeff Mooe just does good work can you recomend a Bofend mic to use.