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Author Topic: Needed - Source for replacement IF Transformer  (Read 3093 times)
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W8EJO
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« on: July 04, 2005, 03:05:31 PM »

I am attempting to repair an old TMC GPR90. The 3rd IF has a bad 455kc IF transformer and I need  a replacement.

Specs are 95 micro henry;  Can size is H= 2 3/4" x W= 1 3/8" x D= 1 3/8";
Q=82.

Any help would be appreciated.
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Terry, W8EJO

Freedom and liberty - extremist ideas since 1776.
ka0pad
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« Reply #1 on: July 04, 2005, 03:47:00 PM »

If you cant find one, and your feeling adventurous, you could make one per Harry Lytholl:

http://web.telia.com/~u85920178/blocks/if-txfmr_tube_00.htm

Harry's got a great site to browse.

Larry
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WA5VGO
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« Reply #2 on: July 04, 2005, 04:57:34 PM »

Are you sure it's not repairable? I've been able to repair almost every bad IFT I've encountered. Check the windings where they terminate. This is a very common failure point. Even if everything looks okay,  reterminate them. Also check the fixed capacitors to be sure they aren't bad. If everthing else fails, get a K-tran replacement and install it in the old can. No one will know the difference.

Good Luck,
Darrell, WA5VGO
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