02-01-2016, 03:58 AM
Good advice, guys. Actually, last week I bought a needle file and gently cleaned all the Loctal sockets. I inserted the file ever-so-gently, less than ¼ inch, and removed it as soon as I felt any resistance. But when I put the tubes back in, each one slid in with practically no resistance. I thought I had destroyed all five sockets and started considering replacing them, but the next morning they felt tighter. After 24 hours they were back to normal. With the tubes back in, I checked the continuity of each pin to its chassis connection.
The original output transformer is OK, but it is interesting that the one in my parts set did have an open primary.
After all the tube jiggling and circuit tracing everything fell into place and I got a decent alignment. And, Mike, I really do have a half-dozen PF Chang chopsticks that I use for probing live circuits. Reception is good. Volume is good. And there is no hum! BUT…
…I have a problem with the speaker(s). The original speaker needs reconing, and I’m trying to learn how to do that, but the “good” speaker (from a 41-255) sounds terrible. I won’t try to describe it, but I’m sure that the problem will be recognized by listening. This is a 20-second video. In the middle of the video I demonstrate that slight pressure on the dust cap or the periphery of the cone corrects the problem.
https://photos.google.com/photo/AF1QipMD...x8RVSDoTKj
Any advice will be greatly appreciated. Does someone know what’s wrong with the speaker, and is it repairable without reconing?
The original output transformer is OK, but it is interesting that the one in my parts set did have an open primary.
After all the tube jiggling and circuit tracing everything fell into place and I got a decent alignment. And, Mike, I really do have a half-dozen PF Chang chopsticks that I use for probing live circuits. Reception is good. Volume is good. And there is no hum! BUT…
…I have a problem with the speaker(s). The original speaker needs reconing, and I’m trying to learn how to do that, but the “good” speaker (from a 41-255) sounds terrible. I won’t try to describe it, but I’m sure that the problem will be recognized by listening. This is a 20-second video. In the middle of the video I demonstrate that slight pressure on the dust cap or the periphery of the cone corrects the problem.
https://photos.google.com/photo/AF1QipMD...x8RVSDoTKj
Any advice will be greatly appreciated. Does someone know what’s wrong with the speaker, and is it repairable without reconing?
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