03-05-2011, 03:28 PM
The hair tricked worked quite a bit. I was able to identify three of the four unidentifiable tubes. The fourth at least looks like the pictures on the internet of a 7c6 and it was in the 7c6 socket. the 7b7's were in not in the right place though.
I disconnected the antenna and the buzzing is still there, present with the 170vdc too.
I have the schematics and I definitely don't see any 170volts on this set. The highest voltage in the schematics is 108vdc across one of the electrolytics. I have no idea where the 170 is coming from. Maybe a ground somewhere? I can't find any grounds to the chasis and the I've replaces the wires that looked worn. I also rechecked all my soldering and all the connections to make sure there wasn't a short (at least as well as I could). The ol' ohmmetter doesn't register a ground either between the chasis and any connection I could find.
I'm going to recheck my electrolytics in hope that I put them in correctly. The foil caps don't matter which direction they go in, right? I did not check direction on the foil caps.
Thanks for all your help and I'll continue my pursuits and let you know what I come up with.
-Brandon
I disconnected the antenna and the buzzing is still there, present with the 170vdc too.
I have the schematics and I definitely don't see any 170volts on this set. The highest voltage in the schematics is 108vdc across one of the electrolytics. I have no idea where the 170 is coming from. Maybe a ground somewhere? I can't find any grounds to the chasis and the I've replaces the wires that looked worn. I also rechecked all my soldering and all the connections to make sure there wasn't a short (at least as well as I could). The ol' ohmmetter doesn't register a ground either between the chasis and any connection I could find.
I'm going to recheck my electrolytics in hope that I put them in correctly. The foil caps don't matter which direction they go in, right? I did not check direction on the foil caps.
Thanks for all your help and I'll continue my pursuits and let you know what I come up with.
-Brandon