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RE: Level 5 2A3 SE Design

"A single high mu...."

Just wondering why one would need a high mu tube? High gain?

If the 2a3 were operated at text book operating points, biased at about -45 volts, then a gain of 20 (6sn7 CCS loaded) would give 56.4 volts peak at the grid of the 2a3 from a typical CD player with 2vrms output.

This means the musical peaks on the CD would more than drive the output tube to full power.

Is there any reason to do more than that?

2vrms is 2.82 volts peak, 2.82 times 20 is 56.4 volts peak.

Tre'


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