I have found that leaving the "TX Audio Source" in the AUX or BOTH causes
big SSB problems when running high power. I use the AUX input for PSK31
connected to my computers sound card. When I go on SSB I change this item to
MIC. This helped.
I also use open wire line and had to terminate the line outside the house
where it connects to a balun then a short, 20 foot coax to the Orion.
Now my Orion is happy.
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