Hi Bela,
I would first check that the low-pass filter selection is working correctly.? You measure the voltage on the banded (cathode) side of the six diodes used to select the filter.? ?The two for the selected filter should be close to 0volts; the other four should be around 5volts.? You do the test using the terminal RF Sweep program to choose the bands without transmitting.? You should not transmit while doing the check.
If the switching selection is OK, verify that you have the capacitors in the correct location.? I have not found a need to add or remove windings from the low-pass filter toroids.? I did have to adjust the wire spacing to tweak the output on the 20/30 shared low-pass filter L4.? That was the only one I needed to tweak.
How is the receiver working?
73
Evan
AC9TU
