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Hans,

One bug, and one idea.

Bug:? When doing RF image sweep immediately after startup via console (doing nothing else), the graph shows no rejection on 80m.? When I switch bands and come back to 80m, I get -25dB rejection and it works.? Not sure exactly what's going on, but I'd suspect something isn't getting set in line right.

Idea:? I've noticed that the BPF for 40m, 60m, and 80m are all the same BPF tap (Full inductor, 1200pF) using IC402 Y3 / Pin 13.? I feel like it wouldn't be too hard to put a another capacitor in C403? (DNP in 20-80m rigs) and have pin 10 selected for 60/80m (or just one of them, depending on what gets tried) and adding in a dozen turns or whatever onto L401 that cross over the incoming pin from RX_IN.?

Discovered this while tuning my BPF, I think I left a turn off L401, all the BPF filters are up off center, but then I was wondering why 60m/80m was so far off center, finally realizing it's shared with 60m/80m.?

Is there a way to manually set the BPF configuration for 60/80?? (Or is there a way to do a test build that I can load?)? Since I can't do it myself since the firmware isn't open, I have to ask.? (Not criticizing there, I get why you wouldn't want to release the source code).

As an aside, maybe a bug, maybe something for a future revision (Probably hard to fix), I found a minor mechanical interference that you probably already know of.? It's between the mounting screw of the power supply board and the enclosure.? It's very minor, and you can just kind of force the two together and it still works.? But it was bothering me that the two halves didn't quite fit together right and smooth, so I kissed the inside edge of the case with a 3/16 end mill bit in my mill and took a small chunk out of the case.? Picture below.? With this taken out, the nylon screw and the case no longer interfere and the case goes together just right.

I posted this fix a couple months ago.? Without the relief cut, the boards flex when the case halves are assembled.? I assume most don't experience this binding.

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73, N4TVC, Randy

I see the same with my hiband QMX. Image sweep via console -2dB at 20 meters and after switching bands and returning to 20meters? -28dB.

73
Igor oh2jxa

I've solved this interference using a sharp blade at the head of the thigdent sdrew. The remainig head was sufficient to drive the screw.
But please take care! Dont blame me if you cut more than the screw.