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Old 19th Sep 2020, 10:56 am   #17
retailer
Heptode
 
Join Date: May 2005
Location: Adelaide, South Australia
Posts: 541
Default Re: Rewinding a variac

The wire is not that thin and may be a bit easier to wind than the thicker variety, it just makes for slow going as I need a lot of turns.

I made a start, the holder works quite well - would be very difficult to do with out it, the inside circumfrence is quite a bit shorter than the outside so the turns need to be laid on top of each other around the centre hole, I need to take as much care in placing the turns around the circumfrence of the centre hole as I do around the outside circumfrence so it is slow going. I'm not glueing the wire as I go - once done I'll make a plug from timber I'll centre on top and and clamp it lightly to put a bit of tension on the turns so they lay flat and then varnish them into position - I hope.
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