Hus,
I ran three 4CX250Bs in GG, zero bias in a home brew AMP. That was before
I knew it wasn't supposed to work, but it did. I was able to get about
800-900 watts out with 100 watts drive.
Bob
K8MLM
In a message dated 7/11/2009 8:45:45 A.M. Eastern Daylight Time,
hsu4qro@gmail.com writes:
Hi,
Anyone have experience in grounded grid a pair 4CX250Bs amplifier? could
you tell me how much power gain of this configation?
This weekend, I'm planing to do a tube conversion in my friend's Henry
tempo 2001(a pair 3CX400A7),I have give up GI-7B due to its
larger volume.The only choise is 4CX250B.The gride driven configation
needs screen and grid power supply,so I want to use G-G configation
(gird+cathode as cathode,screen as grid, due to the 4CX250B grid's few
power rating, it is low mu triode now).
But I don't know its exact power gain,anyone can tell me about this?Thanks
in advance!
73!
Hsu
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