开云体育

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It is possible to cover the whole 40m band using a multi-turn pot.
The only thing you need to do is to increase the step size from 1,000 to
10,000.
This is easily done with 100x oversampling. A small modification of the code.
I have done some experiments with the standard one-turn pot and it works
fine. Of course with a one-turn pot the tuning is quit touchy. But you can
do fine tuning (in 100Hz steps) across the entire band from 7,000 to 7,500
kHz without having to use the dreaded "fast scan" or "galopping" function.
I'm now waiting for a 10-turn pot to arrive that I ordered a few days ago.
I hope it will arrive later this week. Then I will do a final test and
share the revised raduino code on this forum. So stay tuned :))

73, Allard PE1NWL

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