[Amps] grounded grid 813 x4

[Roger]

I built up one of the single band 813 GG amps out of QST back in the 
60's, added a B&W850 band switch  and was on 80-10.  IIRC I did the same 
as Carl, but with 2 tubes. I don't remember what I had on them for plate 
voltage. I ran them hard, don't know what it had for IM, but reports 
were good. You could read by the glow of the plates.

I don't remember if I sold that amp or used it for parts.

73

Roger (K8RI)

Carl wrote:
> I placed mine in a box configuration, and tied all the individual socket 
> pins together with copper strap and then to a central ground point in the 
> middle. Its fully stable on all bands at 2900V key down.
>
> Carl
> KM1H
>
>
>
> ----- Original Message ----- 
> From: "jonathan white" <jonathan.white20 at btinternet.com>
> To: <amps at contesting.com>
> Sent: Monday, July 27, 2009 7:36 AM
> Subject: [Amps] grounded grid 813 x4
>
>
>   
>> Hi.
>> This has probable been asked before on this group,but... Is it good
>> practice to physically tie the grids to ground via one connection,or via
>> low value resistors and decoupling capacitors. I was going to go for VHF
>> practice and go for direct grounding,but would like some comments before
>> progressing this project.
>>               73`s Jon
>>
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>
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