The trimmer caps should be easy to find at Jameco, Hamtronics, Digikey and Mouser. If you have nothing to lose, try a small amount of Caig Labs DeOxit first.
s. > Joe <k1ike_m...@...> wrote: > > I've been working on a clubs 223.96Mhz repeater that the receiver lost > sensitivity. It went deaf, so much that the squelch would not even > work. It appears that the plastic variable capacitors in the front end > have gone bad. It was in a very damp water tank environment and this > summer was just too much for it. > > Anyway, has anyone found a good ceramic replacement for the plastic caps > that are a drop-in replacement for the plastic caps in a Spectrum > receiver? I think I'm just going to change them all and be done with > it. The caps in the 220 version of the receiver are 20 picofarads. The > club has 5 more Spectrum receivers that will probably need cap > replacement too, some on 2 meters, 440 and 220. I only want to do this > once and make it an easy repair. If I found a good replacement part > I'll buy a load of them in various sizes. > > It seems that there is a very low interest in repeater repair over the > years. I get many requests for fixing repeaters, and I'm surprised that > it is so hard get someone to even hold the flashlight. It's > discouraging.....I would like to see some interest for the future of > repeaters and ham radio. Others experiencing this? The younger hams > just don't seem to have the curiosity that I had years ago. > > 73, Joe, k1ike >
