Quote:
Originally Posted by andy
... You could probably reuse another coil form after you remove the windings. If you don't have a junk pile, I'm sure someone here can find a spare coil with a long enough form. I will be interested to see if your rewind is successful, or if the characteristics of the coil are too critical to replicate by hand.
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Andy and Old Coot: The original coil former looked to be a brown phenolic tube which would take those little powdered ferrite threaded slugs with the hexagonal holes. You know the ones that after some years jam and split when you try to free them.
I carefully counted the turns as I unwound the coils from the crumbled mess. The quad injection transformer is reasonably complicated but as it is operates at roughly 3.5 MHz, the number of turns are relatively few. I have had success rewinding IF transformers in the past so this should provide a medium challenge if I can only find the length of coil former. If anyone has one, no matter what coil it may already have on it and if it is at least 2 1/4" long, I'd be most grateful if you can spare it.
Incidentally, I received a reply from Moyers: they said they could not find the part. I suppose it is now 50 years but it was used in pretty well all the Zenith sets of the period.