[Amps] grounding grids

[Steven Grant, W4IIV]

This was used on newer tubes (3-500Z - ect) to raise the resonance of the grid to control parasitics.
It is not needed for older tubes

STEVEN GRANT W4IIV

--- On Wed, 7/29/09, Bill Fuqua <wlfuqu00 at uky.edu> wrote:


From: Bill Fuqua <wlfuqu00 at uky.edu>
Subject: Re: [Amps] grounding grids
To: "Herzog" <herzog at frontiernet.net>, "Ham-amps" <amps at contesting.com>
Date: Wednesday, July 29, 2009, 9:28 AM


Maybe to measure individual grid currents?
That would be the only reason I can think of.
73
Bill wa4lav

At 08:35 PM 7/27/2009 -0400, Herzog wrote:
>RE: > >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
>
>REPLY:
>
>I'm curious - what would be the reason for using resistors and
>decoupling caps?
>
>73, Bill W6WRT
>===========================
>Herzog proffers a reason, to be able to measure the grid current.
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