on 6/6/01 9:44 AM, 2 at 2@vc.net wrote:
>> /\ no. the Collins 30S-1 is AB1 cathode driven.
>>
>> I'd forgotten that one. Not sure you can really call it grounded grid,
>> though,
>> since the grid is grounded through 220pF so that feedback can be applied.
>>
> /\ true, Peter, however the grid's RF potential is virtually 0v.
You're right, Rich. I think the temptation is to look at it and since it's
not DC grounded, we don't (at least I don't) always see the AC ground right
away.
The term "grounded grid" while accurate can be misleading. When I first
started messing with amps, the idea of having grid current in a grounded
grid circuit messed with my mind! "How can a grounded circuit really have
current flow through it? Ground is ground is ground." - Again thinking more
along the lines of DC. Then you sit and think about it for a bit and you
realize that there's a whole lot more to it and it begins to make more
sense.
73,
Jon
NA9D
-------------------------------------
Jon Ogden
NA9D (ex: KE9NA)
Member: ARRL, AMSAT, DXCC, NRA
http://www.qsl.net/ke9na
"A life lived in fear is a life half lived."
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