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I built a 7.5VAC 21Amp transformer now it has lots of buzz
Hey all:
I tore down a transformer I got from ebay it was a Zenith TV power transformer from days gone by. Re wound it with 17AWG wire on the secondary and primary. It powers up my 4-1000A filament nicely with 7.25VAC from 120VAC mains. I used a penta-filar winding on the secondary. 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. So what is the cheapest I can gits away with sealing these laminations from buzzing, I used up all my epoxy sealing the windings. 73 n8zu |
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