Hint
Design the amp to have the correct operating voltage for all tubes together
For best sound
Low voltage is normally not a good thing
Unless you know what you are doing
Design the amp to have the correct operating voltage for all tubes together
For best sound
Low voltage is normally not a good thing
Unless you know what you are doing
Do you mean in more detail than what the datasheets for the 12B4 already show? The anode voltage on the horizontal axis starts at 0 V in the datasheets.
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Here's one with a bit more detail than the one in de General Electric datasheet: 12B4 CCDA & Hybrid Op-Amp