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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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Tube DIY Asylum Do It Yourself (DIY) paradise for tube and SET project builders. |
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In Reply to: I'm just the reporter on this one posted by GSH on September 5, 2012 at 00:11:07:
No doubt, you have read the information on the Electra-Fidelity website:http://www.electrafidelity.com/intermodulation-distortion-imd/
http://www.electrafidelity.com/silver-45-se/
A little info can be gleaned from them...
And this, from an A'gon post:
" ..was very supportive of Jack's effort and the result is that we now have two amplifiers in production that will operate in Class A3. The A3-500 is a 300B SET amp with a circuit designed by Jack Elliano that puts out roughly 10 watts.""I would not say that the design is necessarily unique from traditional Class A, but it is different in that while the product of the plate power on the output tubes might be the same in both classes (ex. 300B tube), the voltage in an A3 circuit is higher and the current is lower. Since the power is developed by more voltage the result is more lifelike dynamics. This holds true only if the tube can take the increased voltage in A3. Not all can. We could not do this with a 45 or 2A3, but the 300B and EL-34 were rugged enough to take on the increased voltage."
"What has also been accomplished using this Class A3 circuit is a drop in THD and more importantly IMD. Measurements indicate a lower noise floor as well."
It appaears not just the transformers, but an approach to amp design that uses A3 operation?
Cheers.
"In the beginner's mind there are many possibilities, in the expert's mind there are few." Shunryo Suzuki
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Follow Ups
- RE: I'm just the reporter on this one - RC Daniel 09/5/1201:50:04 09/5/12 (1)
- actually no - GSH 10:32:59 09/5/12 (0)
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