Tim wrote: > Hi Kevin, > > Thanks for the info. I've used the PLL MastrII exciter on a couple of > systems also. > > Now, since this duplexer is of the 'notch' variety, I already have about > 100db of notch (on the TX side) that is tuned to the RX freq. Shouldn't > this be enough?
Yes, 100 dB of duplexer isolation should be plenty - something is obviously a amiss. How dirty is the transmitter (spectral purity)?

