I am looking for someone with technical experience working on the VXR 
5000 repeater. I keep having a recurring problem with the power 
amplifier. The exciter is working, but no power out of the PA. It was 
sent back to Vertex for repair of this same problem, and now it has 
happened again. They had written on the repair sheet that they 
alligned the Tx Vco, but didn't indicate any parts being replaced.

Does anyone know if the thermal protector indicated in the circuit can 
cause this, and if so, does it have to be replaced.

Jim Flanary  K4GV







 
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