[Amps] re; The maximum amount of 811As and 572Bs in parallel

[Hsu]

Hi, 
   I just read  the datasheet of 811A and 572B, I find that 811A and  572B only need 
 no more than 10W drive power , drive 10*572Bs or  811As would be need no morthan
 100W.Is  the loss of in put match work will have too large?
           73! Hsu    
> 
>>>> Tektronix used to use c. 10 tubes in their O'scopes' deflection plate
>>>> amplifiers.  The story about paralleling more tubes having too much C
>>>> is a large pooper scooper of taurine feces because if the # of tubes
>>>> is doubled, twice as much C in needed to keep the operating Q in the
>>>> desired 10 - 15 range. If I had 300W of drive, I would not hesitate
>>>> to build an amplifier with 10, 572Bs or 811As.
>>>> cheers, Hsu
>>>>
>>>>
>>>>>