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What type of wire is used on the torroids? I want to rewind some but I don't know where I put the extra.

Yes, I see similar behavior with my QMX+. See /g/QRPLabs/message/143062 Probably a software bug and maybe the cause for SSB calibration failures. Calling out @Hans! :-) Gottfried

Regarding failure to make contacts in WSTJ-X: From your notes, it seems you have things set correctly for WSJT-X to transmit (full bar under the 'A') and it is decoding fine. So a few things to

No, it is fine.? When in linear mode it says 'LINEAR'.

Hans (and others who may know): On my QMX and QMX+, I have often wondered why the measured TX voltage, as shown in the Diagnostics page, always has a significant drop (about 1.5V) from the supply

Right after posting this I was informed that the TX voltage is NOT the actual voltage supplied to the PA. In fact, full supply voltage is supplied to the PA so, while I am correctly showing the TX

Thanks Stan. I just confirmed that with my 9V build. I assumed... oops. Anyway, I will just dial it back to 9 volts. Tony ________________________________ Sent: Monday, April 14, 2025 11:57 AM To:

Interesting question, Tony.? I happened to have my open QMX+ on the bench along with a DMM and oscilloscope, so I measured the voltages.? My build is for 12V. The diagnostic screen shows supply

Noting that 9V supply only gives 7.5 volts TX voltage, I upped the supply to 10.5 which gives more like 8.7 volts for the TX voltage. I then added another pair of

QMX 1_00_027 firmware WSJT-X would not work with the choice of the QMX as the transceiver. Kenwood 480 did work. CAT button works. I did select the QMX sound input and output in Ubuntu on my

Yeah, there's a button to update your hamlib dll from inside WSJT-X; but that's /also/ broken (it's a theme!) unless you have a very specific openssl dll installed that's no longer easy to

Hi Stan, Thanks for taking these measurements. Your 180 MHz scope is obviously rolling off the 50 MHz harmonics above the third but the waveform at the XOR gate output is as clean as can be

My apologies for sending an unfinished email. Reiner, Yes, the easiast way I found so far is to use 2 x 3 BS170's instead of 2 x 2. I carefully checked the LPF sweeps on all bands before and after

Yes, all good now. And that sounds like a fine POTA kit. Have fun! Stan KC7XE

Let's not get too carried away with special $150 fuses and such, that only discourages the use of these batteries. Large high current batteries should be treated with respect, but are very useful for

Thanks for the feedback Stan. I double checked this and it's my fault. I misread the display. I was looking at the output in Watts, not the Voltage reading! I checked again today. Same setup with the

Reiner, Yes, the easiast way I found so far is to use 2 x 3 BS170's instead of 2 x 2. I carefully checked the LPF sweeps on all bands before and after mounting the extra 2 BS170's. No change is

Thanks Mehmet ! -- 73 ChuckR

Michael, I would echo Russ's concern about RFI. I believe I've seen this issue on this forum before. You might want to do a search for "RFI". Does this behaviour change with different antennas /

I have built my QMX+ for 9 volts. When I run the TX test from the putty window, it shows the TX voltage as 7.5 volts. This is presumably the voltage at the source of the modulator FET as measured by