[Amps] Fw: "Tubes 201" - How Vacuum Tubes Really Work

[Peter Voelpel]

Hi Will,

when the grid is kept grounded it can not become more positive then the
cathode if that is grounded and not negative biased as well, except by RF
drive on it above its choke.

73
Peter

-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Will Matney

Peter,

On that, I agree it's the only way to make one positive (for only part of a
cycle). Are there any other ways to make the grid positive and the grid be
at ground potential with the cathode at ground? A lot of amps cathodes are
at ground potential unless biased.

Best,

Will



*********** REPLY SEPARATOR  ***********

On 7/25/06 at 8:04 PM Peter Voelpel wrote:

>Nothing is easier then that if the cathode is going/driven negative with
>respect to ground.
>Grid voltage is always measured from grid to cathode, not to ground.
>
>73
>Peter
> 
>
>-----Original Message-----
>From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
>Behalf Of Will Matney
>
>please explain how a grid becomes positive when tied to ground?
>
>
>
>_______________________________________________
>Amps mailing list
>Amps at contesting.com
>http://lists.contesting.com/mailman/listinfo/amps



_______________________________________________
Amps mailing list
Amps at contesting.com
http://lists.contesting.com/mailman/listinfo/amps