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Old 06-20-2010, 07:46 PM
electroking's Avatar
electroking electroking is offline
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Location: Montreal (QC), Canada
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Quote:
Originally Posted by VintagePC View Post
Would it be an idea to re-build the coil? I've calculated the length of damaged wire to be 5m, and I have the same fine stuff on hand.

Could it work, or would the new specs be different enough to require adjusting the set anyway? (what I'm hoping to avoid)
It will require alignment of the trimmer on the oscillator section of
the variable capacitor, but that's no big deal. IF
alignment (the slugs in the IF transformers) should not be affected.
Rebuilding the coil on its original cardboard core will probably
yield better results than trying to fit a 'universal' replacement coil.
By the way, the exact number of turns matters more than the length
of wire, so try to stay as close to original specs as you can. Also the
wire must be enameled (thin coat of varnish rather than bare wire
or wire with plastic insulation). This is often sold as 'magnet wire'.
Good luck!
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Old 06-21-2010, 11:12 AM
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VintagePC VintagePC is offline
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Unfortunately the coil was so chewed up I couldn't reliably count the number of turns.

However, I did piece all the lengths together and I would assume that with the same total length of wire, wound in the same manner (or as close as possible) would result in the same number of turns.

I have numerous low voltage transformers that I'm never going to use for anything else- I'd thought to salvage the wire from one of those, provided it's not potted. I also have a huge copper coil (magnet wire) from a TV yoke, but I think that's too thick to use. Fortunately, the secondary coil was untouched, and so I have it for both a reference in wire size and winding pattern.
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