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Old 2nd Feb 2019, 5:37 pm   #33
avocollector
Heptode
 
Join Date: Jul 2010
Location: Wellington, New Zealand.
Posts: 653
Default Re: Old books/magazines and the gems within

Quote:
Originally Posted by rontech View Post
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Originally Posted by avocollector View Post
Quote:
Originally Posted by rontech View Post
I am sure that would work. A lot of the fun and sense of achievement I got in my teens was actually winding the coils, making a core out of lengths of iron wire, making a brass spring / steel interrrupter arm etc. The finished winding was put in a vat of molten candle wax to increase the interlayer insulation. I doubt if soft iron wire, 36 s.w.g. enamelled copper wire is readily available nowadays. Oh and also made a polished oak base .
it did but for some strange reason the diodes in the battery charger literally melted - I mounted the coil on a nice pine base if that is any good.
I am not sure to what the "it did" refers, but for the induction coils I made, I think the primary was wound in 20 or 22 SWG enamelled copper wire. This is about 1 mm in diameter and the resistance of the primary would be very low indeed. Probably the current would exceed the limit for your charger diodes.
Ooops - no this was the car coil set up and the primary on that had a high enough resistance
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