Mmmh, so do I have to scratch off the logo know? I already have a set of these "illegal" front panel PCB's :-/
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More important: I made a stupid mistake while checking the raly status of the ATU!
They have low side switches and I measured the relay +5V pin, as it's easily available when everything is assembled. For sure there you alway have about 5V...
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Today I added the bypass switch and sneaked a few wires between the boards, as it felt weird with powering all relays during reset.
In fact only relay 1, which toggles the C's between antenna and tranceiver side powers up. So, the reset clears all LC!
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I also noticed that the ATU not always finds optimum SWR in the first run. After running it at a different frequency and going back again, it sometimes matches much better in the second run. Would be nich to have a button to force another tunign cycle.
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The bypass switch just offers the option to keep the LC setting and bypass everything and directly returning to the old settings afterwards. From my point of view not reall required, as a reset and re-tune does not take much more effort.
Dirk