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Interestingly the tone seems to be much louder relative to the band noise when using headphones over a speaker. Perhaps the impedance of the audio device you have plugged in is effecting this? The

I re-did the L12 quite carefully but pretty much nothing changed on the rf filter sweeps. Either I did the same mistake twice or there is something else going on. I was only looking to shape of the

Well that's good news I guess.... I thought you said that the TX line from the processor was not functioning at all... I guess I misunderstood. As bad as it potentially sounds for Hans, in reality we

Regarding Olvia, I'm CQ'ing on 7.0714 dial (8/250), recorded it with another receiver, played the WAV in fldigi and it did decode! So I'll keep trying, see if I can make a QSO.

See the last page in the manual ( Page 106 in current version)? All of Hans' manuals contain detailed revision status.

Is it possible to get a summary of the revisions to the manual? I printed mine yesterday in anticipation of today’s arrival and now see there’s a revision posted today. Don W6CZ

All, Just as a reminder the TX signal on my QDX is working fine.? The issue was the secondary check that the MPU does for a valid tone to set and not a failure of the I/O output.? For some reason,

Bob, Maybe try another PC if you have one.? As my posts in other threads have stated I am having issues with one of my Windows PC.? The Raspberry Pi seems to work fine. The lack of current draw when

Thanks Evan I put the QDX in its case. The USB cable has ferrites on both ends. I also coiled the excess length and tied it together. For these tests I'm transmitting into a dummy load and using 9

Love that movie! Roy WA0YMH

There's something like the 'law of unintended consequences'. You do one thing that makes sense and all sorts of things happen that you didn't expect. -- 73, Dan? NM3A

Brian, quick first question is what are you using for a power source? “Wall wart” supplies are notorious for not always being well filtered and can cause such issues. Ron

I just completed a new Progrock using the recommended power/regulator setup.? The voltages are correct, correct parts, no shorts on the boards, controller installed in the socket correctly. . It

Hi Fred I don't agree... When the pin is an output, the processor sets it at either 0V or 3.3V. Provided its current handling capability isn't abused, it doesn't matter what voltage it is "pulled up"

Interesting. I am reading that you should not have those pull-ups to 5V there at all if the pin is used as an output. The inputs have clamping diodes to clamp the 5v input to 3.3v. If anything having

Hi Evan. In my previous work life, I made use of the fact that most CPUs never go totally to 0.0 volts, they usually will be above zero and well under 0.5 volts. When I was trouble shooting a CPU or

Clickable: https://ae5x.blogspot.com/2021/11/spectrum-analysis-qdx-on-60m.html -- John AE5X

For those interested: https://ae5x.blogspot.com/2021/11/spectrum-analysis-qdx-on-60m.html -- John AE5X

Hi Matt, Have you measured your RF voltage at the output of T1 yet with your probe? The RF should be about the same as at the BS170’s, this is the junction of C32, C34, T1. C32 feeds the voltage

An additional note: RS232 logic "1" is a negative voltage, logic "0" is positive. TTL logic "1" is a positive voltage and logic "0" is 0 (or a very low positive voltage)---NORMALLY Milt W8NUE