[Heathkit] sb200

[Jim Brannigan]

Thanks Glen, I thot I was having a "senior moment"
I ran a HB 572B amp for years and started to say to myself, "what was the 
screen supply voltage"?

Jim


> There is no screen voltage in the SB-200.  It uses a
> pair of 572B triodes which have a filament, grid, and
> plate.  To have a screen the tubes would have to be at
> least tetrodes, not triodes.
>
> Glen, K9STH
>
>
> --- ted orant <ted1970 at sbcglobal.net> wrote:
>
> Have sb200  and wondering if screen voltage should
> drop to -50 volts on key down.