I went back and confirmed that I was seeing attenuated signals when the
receiver was set to 30M and the transmitter was set to 10M (Split mode) and the
tuner was disabled...... Please forget all after "What I think I am seeing" ;-)
What I was seeing is the Orion Band Decoder output driving the Top-Ten Decoder
and changing antennas to match the transmit frequency. I was using 30M and 10M,
which are different antennas. With 30M as the receive frequency and 10M as the
transmit frequency the Band Decoder switches to the 10M antenna - much reducing
the strength of received 30M signals - no surprise there! I re-ran the test
with the receive on 20M and the transmit on 10M(Tuner disabled). I was just
listening to signals on 20M but I really could tell no difference when the
transmit was switched to 10M - both 10M and 20M use the same tribander. I
should have done the testing with the signal generator direct into the Orion ;-)
73,
Merle - W0EWM
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