[Amps] Parasitics & Filament Sag

[Bill Turner]

ORIGINAL MESSAGE:

On Tue, 29 Aug 2006 12:30:43 -0700 (GMT-07:00), Colin Lamb
 <k7fm at teleport.com> wrote:

>Old time home brewers will remember the 6AG7.  

------------ REPLY FOLLOWS ------------

Indeed I do. A wonderful tube, but not for RF. It was originally
designed as a resistance-coupled amplifier for video output circuits
in the early black and white TV sets. It's gain in such a circuit was
among the highest ever achieved in a consumer type tube at that power
level. No doubt that helped make it squirrely when resonant circuits
were involved. :-)


-- 
Bill, W6WRT