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-   -   why p-p amp RL for class B is 1/2 the class A load? (http://www.diyaudio.com/forums/tubes-valves/117325-why-p-p-amp-rl-class-b-1-2-class-load.html)

walter33333 12th February 2008 05:47 PM

why p-p amp RL for class B is 1/2 the class A load?
 
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why p-p amp RL for class B is 1/2 the class A load?

thanks!!

ilimzn 12th February 2008 05:54 PM

Because in class A PP both tubes work at the same time into the same load sharing it, so for each tube it looks like a load of twice the impedance (two times 'lighter' load). In class B tubes work in alternate phases, one for each half-wave, so the load is not shared - each tube sees the full load for one half wave.

walter33333 12th February 2008 05:56 PM

thanks


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