>Rich says:
>
> >... too much power is lost with large tetrodes - which have No
> >requirement for ability to shunt large negative screen currents. For
>an
> >8171, we are talking about adding a several kV supply and very roughly
> >500w on standby.
>
>If there's no negative screen current, then you can get away without a shunt
>screen supply, admittedly. But you made a blanket, general staement. There
>are
>ways of shunt and series regulating at voltages over 800.
One could shunt regulate the 9kV anode supply if one wished. With more
than 800v on a screen, there is virtually no reverse current. With 400v
screens, shunt regulators are quite right. With 1500v screens, crowbar
protected pass regulators are more suitable.
end
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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