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congrats on the fix..
now you have th epower and the time to contest.. Contesting is much like transformer winding.. Once you learn how to do one turn, you repeat and count until you reach a goal... In contesting you do one turn, then another till you reach the time limit and count your turns. hi hi Hank "raypsi" wrote in message ... On Oct 25, 12:25 pm, raypsi wrote: 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 I finally got around to clamping the transformer down with grade 8, 1/4inch bolts and nuts That didn't help, luckily I found my 3 hour epoxy, ran the transformer for 3 hours straight to heat it up, took the bolts out and with a putty knife slapped on some microwave heated epoxy on the lams. That took the buzz down to below the level of the fan noise. In dead silence you can still hear it. Nowhere can you feel the buzz. 73 n8zu |
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