Martin, I did mean in line as series to the antenna connection.
Clearly, having diodes ahead of an attenuator is going to do no good in
strong RF fields. By strong, I mean 3 blocks from a daytime 25 kW station
you can get 10 volts per meter. That is what we have at the research lab
where I am.
The diodes are going to conduct after 0.6 volts if silicon, and if no series
resistor raises their ability to conduct. Then you have non linear products
of all the RF coming in.
Perhaps there is a bad diode in the protective circuits. From all the
descriptions of problems on this one Orion, it sounds like an anomaly.
There are contesters using Orion with NO problems, they have posted in other
forums.
-Stuart
K5KVH
In our RFI testing, the attenuator goes right after the antenna, then the
receiver circuits.
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