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There is a thread a few months back on navigating the QDX's menu on a Mac (symptom is ctrl-Q does not work).? ?If you do a search for my call sign, you should be able to find the thread. Cheers -

Thanks, Cliff! Making some progress. Connecting the QDX to the iMac creates a new devices /dev/cu.usbmodem1444201. WSJT-X doesn't see this device. But flrig does see it. When I configure flrig for the

Thanks for the opinion, Alan-- I was concerned when the graphs didn't meet my expectations and I couldn't find anything to compare them to. 73

Windows 11 Sound Control Panel (thinkPad) doesn't have a recorder LISTEN option - Windows has exclusive control of QDX (on my ThinkPad)? - I tried - but the realized I'm dealing with a data-stream

Found one.. thanks!!!! Tim NZ8J

I had one band that was lower than the others, adjusted the spacing on the LPF toroids and it gave me an extra watt to match the others. 73, Cliff, AE5ZA

Using a well-regulated power supply. Rock-solid 9vdc and plenty of current. Drawing 60ma at rest. ...doug K6DRK

Fldigi has an audio monitor function designed exactly for listening to the incoming signal and even the output signal if you wish. Set it up in the fldigi config/soundcard/Device page by enabling it

Cristi, I'm replying in the " QDX upconversion accuracy is not adequate for HF FST4W operation " topic, since that seems like a better place to discuss the FSK frequency issues.

[shifting a conversation from the " QDX Heat and Mod " thread to here] The amount of error in the WSPR FSK modulation is significantly greater than 1%.? I'm measuring frequency step errors that are

Great point, Alan! I didn't check pk2pk at output of T1 - indeed it can be losses at LPF afterwards. will check it and get back to the thread. thanks! Andrey

that's relieving :) thanks for confirming! can you point where is the flaw in my logic, and how it should produce 5w using 9v? thanks! Andrey

Andrey, If it is built for 9 volts then the PA gets 9 volts, you could say the schematic is wrongly labelled. 3.6 to 5 Watts makes little difference to the end user. (Receiver, maybe 1.5dB) but

Hi Audrey. On the schematic, "+12v" is just a generic way of indicating the input voltage you are using should be present at that location. Since there is only one schematic and two (or more)

Hi! I am debugging low power output on my build of QDX v3 (I observe ~3.6w on all bands). My QDX assembled for 9v with T1 wound 3:3. output pk2pk is ~37v, which indeed should produce ~3.5w to 50ohm

I agree re: testing, and that's my primary use for noise as well.? If you operate CW though, it's nice to be able to hear to copy in a set of headphones.? FLDIGI and others don't usually print CW

Yes, must be the PSU or faulty QDX processor memory. 73 Alan G4ZFQ

Mitch, If I do that on my W10, then turn down the volume to zero it comes back at full volume after a reboot.. It helps sometimes when testing but the waterfall is all I ever use. 73 Alan G4ZFQ

Low power voltage? Low current limit on the power supply?

Works here on MacOS Mojave. Did you select the TS-440S? Another way around the issue is to use Flrig. I also use the QDX with fldigi so using flrig with fldigi in Wsjtx just select flrig flrig as the