Thread: I built a 7.5VAC 21Amp transformer now it has lots of buzz
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Old October 26th 08, 03:40 PM posted to rec.radio.amateur.homebrew
Grumpy The Mule Grumpy The Mule is offline
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First recorded activity by RadioBanter: Sep 2008
Posts: 87
Default I built a 7.5VAC 21Amp transformer now it has lots of buzz

Uh! Sorry Ray, it was near 2AM and I misread this. Of course
there's no gap in the core it's a linear AC transformer. No
DC in the windings and so no gap.

Usually I'd do everything I can to reduce any gap, inclduing
interleaving the laminations, to reduce the magnetizing current.

I just wasn't thinking, that happens sometimes.


raypsi wrote in news:ea79280c-6148-42a5-be23-
:

Shimmed the bobbin in the core window with some 1/8 thick
virgin teflon. Epoxied the windings to the bobbin. This was a 240VA
transformer and now is a 83watt buzzer / 157watt filament transformer.

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