Pete - got to the hangar today, pulled both radios and put the non working no.1 in the no.2 position and it worked - so good news is radio is ok . Checked the radio power breakers and found power thru them so leads to the KA39 convertor being the suspect. I opened the exterior avionics panel and sure enough its setting there like you said. Thats probably as far as I go with trouble shooting it. We have Muncie Aviation close by and they are an avionics repair station so I will fly it up there and have them check the unit, hopefully they can even repair it. Thanks again for your help.
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