[AMPS] 812A

[km1h@juno.com]

On Fri, 6 Nov 1998 16:50:38 -0000  Peter Chadwick
<Peter_Chadwick@mitel.com> writes:
>
>I see Svetlana are advertising their 812A for linear service. 
>Doubtless
>someone will  correct me if I'm wrong, but it doesn't look to me as 
>being a
>particularly good choice of tube for GG service as a linear, and 
>pointless
>in AB2 grounded cathode (Generic term being used) compared with a 
>tetrode in
>grid swamped service. or have I missed something?

With an amp factor of 29 it will certainly be a bit harder to drive. My
old RCA manual lists a 270V peak grid voltage plus a bias requirement of
-48V in Class B audio service.
Not my choice of tubes but it would probably be easier to tame in a
homebrew project. 

73  Carl  KM1H


>
>73
>
>Peter G3RZP
>
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