In Reply to: Re: PP amplifier measured data posted by mqracing on September 28, 2004 at 10:30:00:
Hi mike.In class A the load seen by each tube is raa/2 whilst in class B the load seen is raa/4. In class AB the impedance changes at cut off of the second tube.
The reason for raa/2 during class A is that both tubes are actively dirving the load and each delivers half the power. The tubes are effectively driving the load in parallel - one may be anti-phase but so is its half of the transformer load.
HTH
Chris Jennings
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Follow Ups
- Re: PP amplifier measured data - pp man 09/28/0412:34:01 09/28/04 (1)
- Re: PP amplifier measured data - Sector-7G 14:15:57 09/28/04 (0)