#qdx — Public Fediverse posts

Got a little QDX radio that isn't working.

Connects via USB, just looks like a sound card and a serial port.

It works like a penny whistle!

You blow on the end of the USB cable, and it measures the zero-crossings of the audio waveform, figures out the frequency, adds maybe 7 or 14 million to the number, then squeaks out a 4 Watt RF whistle to the antenna.

Except the BS-170 N-channel MOSFETs probably popped from high voltages from momentary bad SWR.

So no happy whistling.

#QRP #QDX

Ok, just discovered digipi.org, which seems like a perfect combination for the QDX for doing digital modes on the go. Here I’d been thinking I might have to go buy a laptop…but here’s a solution for $40ish. #ft8 #qdx #raspberrypi #digipi #hamradio

Treating today's #SolarEclipse #pota #parksontheair activation like #fieldday. Running 3 #qrpradio #qrp stations. #ft817 #morsecode #ssb #20meter #qcxmini for #wspr & #QDX for #FT8 #amateurradio #hamradio @POTAspots

@KI7CFO great idea on learning #morsecode For QRP I do have a #QDX, #truSDX, #IC705 and a QCX Mini on the project pile. Yaesu #Ftdx10 is my main shack radio now

All the smoke stayed in the QDX! If only I had an antenna at home to test it out.

I had to get a little creative for the case. #HamRadio #kitbuilding #qrplabs #QDX #workbench #qrp

Good news is, I suppose, it looks like the trace for that connection is on the bottom of the board, which appeared undamaged.

So perhaps I have a configuration issue, and not physical damage to the board to contend with.

#QDX #KitBuilding #mistakes

Argh! I am nearly done with the #QDX build but I have found my mistake - I accidentally put one of the capacitors in the wrong set of holes! (C14 in the antenna shield/center pin, for those familiar with the kit).

So I will now need to lay hands on a hot air re-work station, and probably source a couple replacement caps since I doubt I'll be re-using the one I made the mistake on. So close to completion!

#electronics #KitBuilding