>
>There's been so much discussion on this, I can't resist:
>
>Last time I built a tetrode amp I used a 4-1000A grid-driven and put +550V
>on Ig2, provided by a stiff power supply that had no electronic regulation
>whatever. Just a 400V, 200mA transformer, full-wave bridge, ~160uF
>filtering, and a 10k, 50W bleeder resistor dissipating 30W. Eg2 never
>varied by more than 1-2Vpk key up, key down, with modulation, without
>modulation, whatever. Seemed plenty stiff enough to me, and cost about $20
>for the entire circuit, including the transformer.
>
// Sounds good. How did you protect the screen from loss of anode
potential?.
cheers, Steve
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
end
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