Did you measure the voltage at the PA transistor? I'd look at that first. Also measure the exciter output and see what it's doing. If I recall correctly, the repeater uses a relay to switch in and out a dropping resistor for backup DC operation. I've seen that really fail or the circuit land open up. I had a TKR 750 that acted the same way but it had been underwater for 7 weeks after tropical storm Harvey! It worked for about 10 minutes until the microprocessor went crazy.

Hi Group,

????????????? I have a TKR-851 that I thought had bad finals. It had about 2 watts output. Installed a new transmitter board with new driver and final transistors and now I get 3 Watts output. If I drop it to low power, I get less than 1 watt. The power in the software is turned up. The power adjustment pot does not seem to be functional. There are no PLL errors flashing. Anyone have any thoughts on what might be going on?

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Brandon Vetter

N7IRG

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