[Amps] cathode to ground in tetrode amp

[Bill Turner]

ORIGINAL MESSAGE:

At 07:14 AM 1/30/2006, Partain, Chuck wrote:

>OK, getting into this more and more every day and learning. Looking 
>at some designs on this GU-84b
>amp, I see a lot if not most of the cathodes have resistance, some a 
>lot(30k) some little (.7) to ground.
>The screen grid and control grids are not grounded and have 
>respectively ~350 and -150v on them.
>
>Why wouldn't it just essentially go to ground? what does the R do in series?
>
>thanks as always.
>
>KA1MWP



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Is there a schematic we could look at?

73, Bill W6WRT