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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: PPP class A1 power amps posted by spl779@yahoo.com on February 18, 2007 at 12:54:38:
If a stage has a plate load resistor, that resistor not only sets the nominal plate voltage, but "eats" some of the amplified signal, since the varying voltage across it causes it to conduct a varying current. An infinite inductance (even with a controlled resistance) would allow through DC but would reject all AC, making the stage more efficient and, it truns out, more linear. If you check the archives i did the math that shows this a couple of months ago search for algebra, I think). Inductances aren't infinite, so you'd pick an inductance that has nearly infinite reactance at the lowest frequency of interest (say 5 or 10 Hz). The other three items I'd be guessing on.
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- I can explain a little... - lipmanl 12:31:18 02/19/07 (0)
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