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