[Amps] Weird tubes in an amplifier

Roger (K8RI) k8ri at rogerhalstead.com
Wed Jan 29 17:22:33 EST 2014

On 1/29/2014 4:00 AM, William Turner wrote:
> ORIGINAL MESSAGE:          (may be snipped)
> n 1/28/2014 11:22 PM, Fuqua, Bill L wrote:
>>    I also ran 4 6AG7s in grounded grid.

I never saw one in a TV, but they are an old tube. Often used as an 
oscillator.  I've seen amps designed with the tubes on the bottom  and 
set in water.  Looked really strange but added greatly to the tubes life.


Roger  (K8RI)

> The 6AG7 was a great tube in its day. Had about the highest
> transconductance of any consumer-type tube as I recall. Originally used
> as a video output amplifier in early black and white TVs.
> 73, Bill W6WRT
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