>
>re: g-grid circuit options... #1 grid potential
>-
>Hello there,
>-
>I'm working on tetrode and pentode grounded grid circuit
>design for an amplifier rebuild project.
>-
>There are grounded grid circuits where the #1 control grid
>is tied to the cathode, others where it's removed from
>ground and cathode potential and operated with a dc bias,
>while the other grids remain grounded. These circuit layouts
>are related to the type of tube and the ability of the #1 grid to
>deal with excessive dissipation at some drive levels.
>-
>The 4CX250 is one such tube in which text's mention g-grid
>operation with the #1 grid at ground is not the best choice.
>Excessive grid dissipation at high drive levels might damage
>the tube. Other tube types tend to be better suited to all
>grids grounded g-grid operation.
>-
>I'd like to know if anyone can provide reference material -
>text name sources where I can obtain more detailed
>information about the placement of the #1 grid.? Most
>of my Handbooks just breeze over the details.
>-
The 4cx250 is not unsuitable for g-g.
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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