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Author Topic: IF Transformer Kit  (Read 4812 times)
KB1WSY
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Posts: 804




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« on: July 16, 2012, 02:49:57 PM »

Here's my new toy: "Harnett Electric Corp. IF Transformer Kit":

http://tinyurl.com/c6d5c3e

Found it on eBay and awaiting receipt of it. Have been told it comes with at least a few instructions. It is probably at least 50 years old. Does anyone have experience/advice with this one?

I am looking forward to doing lots of experiments, in conjunction with my Morris Universal Coil Winder.

73 de Martin, KB1WSY
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W9GB
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Posts: 2626




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« Reply #1 on: July 16, 2012, 04:39:43 PM »

This would be of interest to the Antique Radio Restorers, especially those having rebuild or rewind a damaged IF transformer.

You have many Yankee restorers in the New England region.

Bob Eslinger, KR1U is one such restorer
http://www.oldradiodoc.com/index.php

National Listing
http://www.grillecloth.com/other/repair.html

ARCI
http://www.antique-radios.org/

San Diego
http://www.oldradiosrus.com/
« Last Edit: July 16, 2012, 04:43:47 PM by W9GB » Logged
KA4POL
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Posts: 2034




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« Reply #2 on: July 16, 2012, 10:02:56 PM »

That looks like a museum exhibit, to good to be touched.
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KB1WSY
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Posts: 804




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« Reply #3 on: July 18, 2012, 12:08:46 PM »

This would be of interest to the Antique Radio Restorers, especially those having rebuild or rewind a damaged IF transformer. You have many Yankee restorers in the New England region.

Thank you. The kit arrived today. It contains the parts needed to assemble 29 IF transformers (with the exception of the coil wire). I am guessing that the 30th (missing) can is the only one that was ever assembled from this kit, presumably at least 50 years ago. Two of them are partially assembled, which is great because it helps me figure out how all the various plastic and metal parts clip together. There are metal cans, phenolic forms, iron slugs, metal connecting lugs, plastic frames and bases, and various other parts.

There are no instructions whatsoever, and Internet searches on "Harnett Electric Corp. IF Transformer Kit" and its variants yield nothing. It is not clear what the point of this kit was. A generic kit for manufacturing replacement IFs for broken radios? A teaching aid for EE schools? A hobby item for hams?

A fun challenge in prospect!

There is quite a lot of info about building IF transformers on the Internet. There's also a book, which I have not yet been able to consult, called "Coil Winding" by William Querfurth of the Geo Steven Mfg Company Inc (various editions between 1954 and 1968). This book is not available from my local library system, although you can find used copies on Amazon.com for a hefty price. Has anyone read this book? At one point it was supposed to be the "last word" on the subject, but before laying out the $$$ it would be nice if a past user of this book has a "review."

73 de Martin, KB1WSY
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KG4BXN
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« Reply #4 on: July 22, 2012, 05:15:00 PM »

awesome photo gallery in the tiny url
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W9GB
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Posts: 2626




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« Reply #5 on: March 16, 2013, 11:01:42 PM »

This web site shows IF can repairs of this vintage (Harnett Electric).
http://www.ppinyot.com/if_transformers.htm
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