tdutch

Thanks, Lee. That's what I'm finding--they omit the capacitance. Thanks for everything, everyone!

Unfortunately, the schematics don't actually say the capacitance. I have 3 different versions of the schematics as well as the other similar Sonomatic radio schematics. For whatever reason, these schematics show just about EVERY other detail except that--I don't get it! I could simply try a few, but I'd rather only buy once and the ranges of the capacitors are quite varied. Yes, Frank, it's physically broken. It's was bottomed out and crumbled when I got the radio.

Here's a photo of the one in my radio.

Very similar, Lee. Those capacitors actually all have different capacitance ranges, so while there may they overlap, they arent the same. However, all the ones used specifically in GM radios might be the same for all I know. I'm hoping there's someone on here with conclusive information.

Hi, everyone! I'm new to the site and want to say hello, but also "help!" I have a 55 century 2 door no post, and I've got everything working again EXCEPT for the sonomatic radio. I've narrowed it down to the antenna circuit. I replaced a dead tube, dead transistor, and dead capacitor, but I also have a dead compression mica trimmer capacitor (the antenna trimmer that is accessible from the outside). It looks like someone cranked it all the way clockwise (probably due to the other dead parts on that circuit) and it's pretty well cracked and ready for the junk pile. If I bypass it, I get sound, so I know that's the culprit. The problem is that I have no idea what capacitance it has to replace it. I can't test it since it's fried, and the schematics I have don't say. The only writing on it is a funny A, then 7264297, and another funny A. I think it's a Delco 981652 model, which is just labelled as Sonomatic on the face. Are any of your experts able to help a guy out? I'll post some pictures of the car in the near future.

Hi, everyone: I'm restoring my 55' Sonomatic radio and I need to replace the antenna trimmer. I believe it is a compression mica trimmer capacitor, but I have no idea what the capacitance is (mine is completely toast and registers nothing). Does anyone have any idea what it is I need? The only writing on it is A7264297A. I believe the radio is a Delco 981652 (Buick Sonomatic) Thank you!