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RE: SET Class A

I used to do that because I could buy ST-70's for about $150-$200.00.

I put them in small-town movie theatres where the owner was on a tight budget, but wanted better sound.

I set them up for choke-input, and ran lower voltages & currents to keep the stock power transformer cool.

I got 11-12 watts/channel, which was plenty of power. I also sometimes used the common EL-34 output tubes that were stock with the amp. I just ran them at 25-30 ma. each. That cooled the whole thing down and made the tubes last.

Sound quality-- especially dynamics, was far better than a stocker-- which was a stressed-out amplifier for sure!

---Dennis---



Edits: 01/04/15
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