>
>Hej!
>
>Do you really need a stabilized screen grid supply?
? On page four of Eimac's specification it says that the screen voltage
must be maintained constant.
>If the g2 voltage
>follows relatively slowly the envelope of a SSB signal, you should get a
>only a slow gain variation in the tube???
? Not slow. Anode current increases exponentially with increasing
screen potential.
> You have then to use a large
>condenser across the g2 voltage.
? Why? One is trying to bypass HF and VHF energy in the anode-grid
feedback path. .
>If I remember right ( and I may be wrong
>)looking into the NAG gg two meter 4CX350 linear the g2 voltage adjusted
>itself
? Eimac recommends constant screen voltage for all tetrodes and all
pentodes in linear service. .
>to the average drive level and you could use anything from 3-10 watts
>of drive with good linearity.
? Only if screen potential is held constant.
cheers, Hans.
- Rich..., 805.386.3734, www.vcnet.com/measures.
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