I'm helping a new repeater owner get a GR300 repeater working properly. It uses the gm300 radios. The transmit radio shows in software as an M34GMC09C3 radio, (UHF, 25 watt, narrow band) but the PA is marked M44GRC90C2AA (Not sure of what this is). It looks like at 25 watt PA was replaced with a 45 watt PA, but I don't know what radio the 45 watt PA came from.
Anyway, it is suffering from intermittent desense and the crackles. Substituting the transmitter with another one of the same power level fixes the problem, so it looks like it is definitely in the transmitter. Sounds like a bad solder joint in the PA because the trouble starts to go away as the transmit radio heats up. It's now set to 20 watts output. I would like to take the PA apart, but I'd like to know what I'm tearing into. Can anyone ID this PA M44GRC90C2AA? It doesn't fit the GM300 scheme of decoding. 73, Joe, K1ike
