OM whoever Understood. It sounds like not analog construction. Email Hans at his company website. Let him puzzle of it. Meanwhile leave the silly thing on to enjoy it some. I was pretty unhappy with t

Well if you had alignment, and it vanishes - to me this implies there is a mechanical change - either a solder joint on an alignment pot or in the audio path. this radio is 'analog' so it has to be so

OM egads Have you tried a new receive alignment with the new power supply? Perhaps it can work now. See what happens now. The mini is much more microphone than other qcx. For example Turning the tunin

Very nice Al, even on the official board. I don't know what use you in mind, as for u3s maybe there is room to have capacitors on the bottom, I literally don't know. I built my own filter test jig, I

FYI these last emails describe an efhw to handle 100 watts. If the application is only qrp portable, there are excellent designs on the web that use a coil about half that diameter. Curt

John I imagine you have tried turning it on with everything but the antenna and power connected? Then plug in headphones - then plug in the key. Just to get some circumstantial data. If I had built th

Eric You need to also determine your weight, packed size requirement. Some sota ops ma use a squid pole to support a wire vertical. Resonance is roughly 234 divided by frequency in MHz for the vertica

Flawless? Almost disgusting for us mortals, but nice you've had practice. Good therapy is to stock up for homebrew projects, restore vintage rigs, put those QCX on the air, perhaps add a qcx PA. Enjoy

Please note each trimmer has its own menu setting. Initially adjustments do not have huge effect until all three controls are getting into adjustment. The T1 coil must have proper windings to work, co

Very Cool, nice to resolve. Some qcx have experienced battle damage due to surgery on T1 hence my prior caution. Maybe we should tally the total toroid turns we have each accomplished, I recall a lot

Mike Well U3S consists only of a PLL, a mosfet and a microcontroller. It does not have an audio or IF interface. Also it cannot receive, so if protocol involves receiving an acknowledgement, it can't

Lee An interesting idea, but find out if anyone has actually done it. My mini is on 20m, but I built a plus for 80m. It was not dreadful to wind T1 as instructed, but I substituted other wire colors f

Do use a different power connector than you use for 12 volts, make it failsafe in your shack. I am thinking if it can do a long dash it might be in the manual. But I can find beacons whether they do a

Phil Most of the radiation from a dipole is within roughly the middle half. Now for EFHW this is a bit more complex since the antenna operates on many bands. Choose its length based upon the lowest ba

Bill Use the rev 1/2 manual I your chosen language. Also note there may be two English versions. In addition to how we spell words, we use different paper size. A4 is common in UK. I suggest skipping

Bertel your path should be okay. i suggest starting with the kit assembled without the PA, operate it QRP to see that everything is working. at this point you ONLY need a 5 volt supply - the current i

#5wPA #u3s

I agree that looks cute, but I wonder if it has enough filtering for ham radio use. Has someone compared receive performance to verify they can copy the same weak signals with this power supply as a n

Jack well George just posted something today with a much shorter materials list (-: if you have the space, I am thinking a longer radiator is beneficial - our GQRP friends had some extra fun with matc

George nice work! perhaps for 20m you mean 33 feet, not 38 feet? or if you did need 38 feet it may be because you had this end portion close to the ground? I know this from half wave vertical antennas

Lee verticals are nice for quick portable setups. But on 20m something horizontal may do better. An end fed half wave is a nice multiband antenna. For QRP the transformer could be homebrew. For higher