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|4th June 2008, 11:20 AM||#1|
Join Date: Jun 2004
Want to trade: 6.2K/4 trannies for 5K/8 trannies
Would like to make a trade.
I have two OPTs from an early 60s vintage RCA console. They were used for EL84 into 4 ohm loads. I removed the amplifier a few months back at which time the output stage was working fine (I had some crackle after warm up but I would attribute that earlier circuit elements. These are hum bucking OPTs where B+ comes in not at the end but part way down the winding and the screen and preamp power is take from the end closest to the B+ tap. The primary is about 6200 or 6400 with 4 ohm load depending on whether you use just the part intended for the plate circuit or the whole primary.
Voltage ratios are
44:1 entire primary
40:1 intended primary
5.3:1 bucking section
I have no need for these trannies but I do need something of similar size with 5000 ohm primary at 8 ohm secondary. These will be used for SE 6EM7 amp. Super bass response not critical as will be used above 100Hz primarily. Something like the $18 edcors would be perfect.
Located north central IN.
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