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>> I'm wondering if someone can explain why AB2 GG
>>service is more linear than AB2 grid-driven service?
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One contribution is the swamping effect for the "feed
through" or "feed forward" power from the driving source.
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The terms can be misleading, as that portion of the drive
power does not appear in the plate load circuit of the
GG stage until after it is converted to a varying dc plate
potential effectively in series with the main amplifier
power supply.
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The "converted drive power" serves a useful function in
linear amplifier service because it swamps out the
undesirable effects of nonlinear grid loading and presents
a reasonably constant load to the exciter.
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cheers.
skipp
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