Heading for article: Rewinding the Power Transformer for an Eico ST-84 Preamplifier

Here is a hands-on article which takes you step-by-step through the process of rewinding a burned-out power transformer. The example chosen, was in an Eico ST–84 vacuum tube stereo preamp from 1962. Only simple tools and equipment were used, except for the electronic turns counter. (That could be improvised differently, though.)

The article is profusely illustrated with colorful photos and includes links to sources for materials. You can see it here (free!):
Thumbnail link for Rewinding Power Transformer article

View the transformer rewinding article (2MB)
Eico ST-84 preamp with the completed transformer

Eico ST-84 with the completed transformer
Disassembling the original transformer
Winding a new coil
Testing the completed windings
Adding external leads to the new windings

Disassembling the original transformer

Winding a new coil

Testing the completed windings

Adding external leads to the new windings

 

Reader Comments

Posted by Steve L. March 01, 2011 - 08:23 am
Hi Joey, I truly appreciate your message.
Steve

Posted by Joey December 09, 2010 - 07:55 am
Thanks for a handy article!

Posted by Steve L. February 22, 2010 - 08:23 am
Hi Steve K.,
Thanks so much!

Posted by Steve K. February 22, 2010 - 07:48 am
Wow. A nice example of clever problem solving. Very impressive.

Posted by Steve L. February 13, 2010 - 04:45 pm
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