Want to trade: 6.2K/4 trannies for 5K/8 trannies - diyAudio
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Old 4th June 2008, 10:20 AM   #1
diyAudio Member
Join Date: Jun 2004
Location: Indiana
Default 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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Old 8th June 2008, 06:34 PM   #2
diyAudio Member
Join Date: Jun 2004
Location: Indiana
Arrangements for a trade have been made.

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