开云体育

Now on RX bandpass filter.

My design worked largely as intended, although the filter peaks may be a bit off on some bands from 60 to 15m. For some reason, the BPF for 12/10m is behaving very strangely. I used all four channels of the multiplexer for switching two inductors and four capacitors. At leas 60/40m, 30/20m, 17/15m filters seem working fine without strange behavior previously reported.

The receiver sideband rejection, image rejection all look good. I did not change anything in the receiver other than the BPF bank.