GoodSoundClub - Romy the Cat's Audio Site

In the Forum: Melquiades Amplifier
In the Thread: Single-stage Melquiades vs. DHT amps

Post Subject: Which Chinese 2A3?Posted by JJ Triode on: 1/13/2009

Romy and drnda,
When you speak of the "Chinese 2A3" which one do you mean? Romy, if you have the Shuguang 2A3C then I understand why you find it better than the Sovtek, no argument there! drdna, the Shuguang is a little more extended on top than the Sovtek but it is not harsh, so I wonder, is your "Chinese 2A3" the cheap Valve Art biplate? Those have a reputation as you describe. Incidentally the Sophia meshies are also Chinese (Tianjin I think.)

Romy, as far as I know the single and double-plate tubes are designed for the same total plate current and other specs, though the new-production single plates mostly have higher max dissipation ratings. That is, the individual plates in the biplates must have twice the plate resistance of the plate in the singles, then are connected internally in parallel to give the same external plate resistance. I have not used any old stock 2A3s yet, myself.

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