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It occurs to me that PWR_HOLD runs through Q104--have you checked for the Q103/Q104 short? Jonathan KN6LFB

Of all your measured voltages, 2.16V on the rightmost pin of the 5V connector is the most bewildering. ?That should be the PWR_HOLD signal and either 0V or 3.3V as it's driven by the CPU. Hans has

I put the bench supply up to 9volts and 250ma. Still couldn't shut it down, so the MCU isn't starting. I've looked at the board, and it looks fine visually. There wasn't much I could do to hurt it,

Hi folks, I am trying to use my QDX-M with a Galaxy S-5 phone, using the AndFLmsg app to run Olivia. I am able to transmit Olivia messages OK, using "VOX enabled", as I can receive the transmission on

Just a bit more background:? everything else seems to be working fine...start-up screen (v3.12), gps reporting, transmissions starting and stopping appropriately.

I have had my U3S running (nearly) non-stop for a couple of years with no issues.? WSPR spots reported from Japan to Germany. Recently...nothing. The QRP-Labs Dummy Load reports: 80 meters: 0.022

1.33pf per meter of wavelength and then make the inductance to suit for optimum Q. -- - 73 de Andy -

Good advice. Unless you know how the switch works then this advice should precedence. But just one small note, it can depend upon the switch type. Switches can be break and then make (potentially

I haven’t fully sorted this out but I think that if you assign a com port it survives to any physical port and through restarts. Give this a try: * Open the Device Manager by pressing the?Windows

I am unable to see the QMX on my computer.

I've just inadvertently? connected my QMX to a different USB port on my W11 laptop and it failed to connect the WSJT-X.? What happens is that the different port means that a different COM port is

Anyone tried this 4sqrp tuner above 10w spec.

Purchased and assembled by Hans 2021. Worked flawlessly for a few months and then the tuning encoder started locking up Have replace the encoder three times and once again the new encoder will not

Thanks everyone for your help. I now have CAT control of the QCX mini so I can continue to troubleshoot until I have an LCD display again. What I didn’t understand initially was that it wasn’t

Did you load firmware? --n1bs [email protected]> wrote:

One thing, you can't turn the QMX off until you have turned it on. The turning off process is controlled by the MCU, it sees the long press and does a load of close down housekeeping, saving

Hans, For Reference as suggested: From Billy (N5SE), My QMX is still in Turkey! Graham Whaley wrote on Wednesday 08/30/2023 at 06:32 CSDT titled Re: [QRPLabs] QMX - sockets for

We are in a hurricane watch and tropical storm ?watch and tornado watch, so to take my mind off the weather, I am trying to get my QMX, Rev 1 going. I have set my power supply at 7volts and limited

I’ll have to find someone willing to do that, I have the right tools to do it I’m sure including a scope, but I’m just really not that great with a o-scope.

Hans, here are a couple of minor suggestions from the Operations Manual. 4.6 - Frequency Presets - Why not have CANCEL be the EXIT button (rather than the right rotary button) and LOAD be the right