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49-905 Mica Disease-FOUND IT!
Mondial
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Posts: 1,114
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Joined: Feb 2013
City: Irvington, NY
#8

03-14-2014, 02:31 PM
Years ago I fixed one of these, by drilling out the rivet, removing the mica sheets and replacing the caps with external silver micas. It was a lot of work but it did solve the problem. I know of no other way, because any IF transformers of this type construction have or will have the problem in the future.

I believe they are referred to as K-tran IF transformers. Do a Google search and see if anyone has better solutions.

This is what they look like inside:

[Image: http://i132.photobucket.com/albums/q18/b...aps/k1.jpg]
(This post was last modified: 03-14-2014, 02:35 PM by Mondial.)
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Messages In This Thread
49-905 Mica Disease-FOUND IT! - by Eric Adams - 03-14-2014, 12:44 PM
RE: 49-905 Mica Disease - by morzh - 03-14-2014, 01:13 PM
RE: 49-905 Mica Disease - by Eric Adams - 03-14-2014, 01:15 PM
RE: 49-905 Mica Disease - by Mondial - 03-14-2014, 01:58 PM
RE: 49-905 Mica Disease - by Eric Adams - 03-14-2014, 02:07 PM
RE: 49-905 Mica Disease - by Mondial - 03-14-2014, 02:11 PM
RE: 49-905 Mica Disease - by Eric Adams - 03-14-2014, 02:14 PM
RE: 49-905 Mica Disease - by Mondial - 03-14-2014, 02:31 PM
RE: 49-905 Mica Disease - by Eric Adams - 03-14-2014, 05:14 PM
RE: 49-905 Mica Disease - by Mondial - 03-14-2014, 06:02 PM
RE: 49-905 Mica Disease - by morzh - 03-14-2014, 08:22 PM
RE: 49-905 Mica Disease-FOUND IT! - by Eric Adams - 03-14-2014, 10:38 PM
RE: 49-905 Mica Disease-FOUND IT! - by Eric Adams - 03-15-2014, 04:33 PM
RE: 49-905 Mica Disease-FOUND IT! - by morzh - 03-15-2014, 09:03 PM
RE: 49-905 Mica Disease-FOUND IT! - by Eric Adams - 03-19-2014, 07:45 PM
RE: 49-905 Mica Disease-FOUND IT! - by Arran - 03-20-2014, 12:49 AM
RE: 49-905 Mica Disease-FOUND IT! - by Eric Adams - 03-20-2014, 01:09 AM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration