On Aug 2, 2006, at 11:40 PM, Hsu wrote:
> Hi,Guys,
> Why many Amplifiers using cathode driven?why not grid ?
On the negative side, grid-driven tetrodes and pentodes require a
screen supply, preferably regulated. On the plus side, a grid-driven
tetrode or pentode provides about 6x more power outout per drive watt
than g-g.
> it with only one advantage of cathode drive: it seems more
> stable than grid drive.but it needs Pi input network and more
> driving power.The amp with grid drive almost needs not driving power
> and input network,it means we can let the fianl work in Class A,
> the better IMD per formance,
> or we can drive the amplifier using a QRP rig?
> 73! Hsu
>
>
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R L MEASURES, AG6K. 805-386-3734
r@somis.org
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