Website update.

[René Schmitz]

At 20:13 27.09.00 -0700, patchell wrote:
>    Maybe this is a pretty naive question, and please remember, I have
>never used tubes in anything, so I might be ignorant......
>
>    Correct me if I am wrong, but doesn't the screen grid on a pentode
>tube vary the transconductance of the tube?  Seems like there should be
>someway of exploiting that to tune a tube based filter.

Right. That should be possible. Varying the screen grid voltage does shift
the DC-quiescent point. It could lead to a differential design, with plenty
of diffamps. Looking at my VTVCA, imagine a cap from plate to plate of the
pentodes whose screengrids are steered. Several of these two pentode stages
could be cascaded. 

Bye,
 René


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uzs159 at uni-bonn.de
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