SET Asylum

Can someone take a look at AD's review of the Raven Audio Spirit 300B amp in the May Stereophile, and

62.44.135.160

Frihed89

Explain to me the advantage of having of having 5 small signal tubes per channel + and interstage transformer? Admittedly, this is a PP amp and so it needs to have a phase inverter. AD's explanation of the circuit is on pp 97-98.
Observe, before you think. Think before you open your yap. Act on the basis of experience.

Follow Ups:

They probably just ripped of this - Chip647 18:09:17 05/05/14 (2)
- RE: They probably just ripped of this - Paul Joppa 21:43:12 05/05/14 (1)
  Good find! That sure matches the description.
  
  For that circuit, the first four triodes are the Williamson phase splitter/driver which has enough gain to allow substantial global feedback without using modern, less linear, high-mu triodes. The interstage transformer allows more voltage headroom for the drivers, hence lower distortion. The cathode followers allow Class A2 operation for greater power. And since the cathode followers need a negative voltage source anyhow, a tube-based servo bias is easily implemented. So there are reasons for each tube.
  - Thanks nt - Frihed89 01:08:41 05/06/14 (0)
    nt
    Observe, before you think. Think before you open your yap. Act on the basis of experience.
RE: Can someone take a look at AD's review of the Raven Audio Spirit 300B amp in the May Stereophile, and - Paul Joppa 14:09:33 05/04/14 (0)
There is of course not enough information to determine the design, much less the potential advantages of each detail.

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