[AMRadio] Grounded grid amp

[Robert Nickels]

On 1/26/2011 11:30 AM, David Folger wrote:
> Thanks for correcting that.
>
> I wanted to call my post back right after I sent it and say that the 
> 6DQ5 would best be used in AB1 grid driven.
>
> Some sweep tubes like the 6KD6 can be used in GG because the grids all 
> come out to pins.
>
>

Hey Dave, don't go beatin' yourself up, I well know how often my brain 
gets out of phase with my fingers  ;-)

But moreover, I'm wondering if what I said about the 6DQ5 not working in 
grounded grid is reallly correct - here's why:   While it's true the G3 
and cathode are connected internally, that's also the case for the 6L6 - 
yet McLaughlin says he tested the 6L6 and it works, and the internal 
connection is clearly shown on the schematic.

So if the 6L6 works in GG, why wouldn't the 6DQ5?

73, Bob W9RAN