Badly non linear level scale - calibrate per receiver?

[tomjon]

But note that there will still few points in some intervals.

This will involve creating a look-up table of level -> dBm by calibrating against a known frequency source. (There may be some support in Hamlib for this.)

[tomjon]

#69

[tomjon]

AR8200 response was measured to be linear is good conditions, but suspect when it heats up the response deteriorates