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Another Philco 38-690 question
Ragazzo
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Posts: 23
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Joined: Feb 2010
#1

09-28-2010, 04:25 PM
The radio works fine, no problem, but in half an hour one of the tweeters becomes very hot.
Namely, item 172, in the bottom part of the schematics. The field coil itself is OK. When I exchange the tweeters, another one becomes hot.
I was suspecting output tubes (6L6G) comsuming too much, may be the push-pul output is not balanced, or something, but without the 6L6 tubes - the same story.
I was not able to find any other suspiciously hot element in the lower or upper chassis. All e-caps are replaced.
Any ideas, why the fild coil becomes so hot?

Leonid
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Messages In This Thread
Another Philco 38-690 question - by Ragazzo - 09-28-2010, 04:25 PM
Re: Another Philco 38-690 question - by Ragazzo - 09-28-2010, 05:05 PM
Re: Another Philco 38-690 question - by Ragazzo - 09-29-2010, 04:26 AM
Re: Another Philco 38-690 question - by Ragazzo - 09-30-2010, 01:31 AM
Re: Another Philco 38-690 question - by Ragazzo - 10-03-2010, 04:54 PM
Re: Another Philco 38-690 question - by Ragazzo - 10-12-2010, 05:10 AM
Re: Another Philco 38-690 question - by Ragazzo - 10-20-2010, 05:21 AM



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