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Old 2nd Feb 2010, 1:05 am   #17
Herald1360
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Join Date: Feb 2007
Location: Leominster, Herefordshire, UK.
Posts: 16,527
Default Re: Cooper Smith Amplifier

Hi Gonzini,

sounds like Ed has more info to go on than I do. I'd second the seriesing up of the output windings he suggests- otherwise the NFB has no complete circuit.

It'll be interesting to see whether the circuit is just the phase splitter and output stage a la Mullard, or whether it's a concertina phase splitter using one of the ECL82 triodes, with the other as a preamp.

In any case, given the size of those O/P TXs, it should sound quite good. They're about twice as big as the ones in the Pye Black Box amp- more like the size of a 5-10 output tranny!

Chris
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