[Amps] Grounded Grid(Screen) 4CX250B power gain

[K8MLM at aol.com]

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 at 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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