Recent content by kp3ft

Hi Andy, I have another question if you have the time. I was wrong about the AM modulation behavior to a degree. What it's doing is there is a small amount of swing for an instant, then drops back to dead-carrier level. It does this with all combinations of low/high AM carrier and AMC pot...

Thanks for taking the time to look at it. I'll try an alignment tuneup from the service manual, and if that doesn't improve it, I'll just play with the carrier and AMC to get whatever I can for AM modulation. It is functional on AM, just very anemic I guess. Its main use would be for SSB...

Strange... the TRC-465 service manual shows C180 and an additional cap on the underside of the board in that area. Mine has neither.

Hi Andy, Thanks for your help. This version of the board doesn't have C202, R202, or D49. C180 is also missing, but the the board shows the silkscreen symbol for it. I attached a screenshot of it. There's no caps, diodes, etc. in that area on the underside of the board. The only number I...

Actually, I forgot, it's a TRC-465 which I think is virtually identical to the PC-122. I did do Handy Andy's version of the clarifier mod which is fabulous! Way back in the day, I unlocked a different PC122's clarifier, and the method was more complex just to keep the clarifier centered...

Hi all, I received an unmodified PC122 that was still in the box, never used. SSB shows full 12 watts, but AM very little swing, almost unnoticable. I adjusted the AM carrier down to 2 watts and varied the AMC pot, but still almost no "swing". I found a couple mods online which might help...