[AMPS] 572B and an old FL2000B

[2]

>
>> Yes it does, what it is actually about is not the bias per se, but the
>> cut-off voltage, which has to be higher (more negative!) for the more
>> lively Svetlana tube.
>
>The power gain of the Svetlana 572 is not higher, the problem is the 
>cut-off bias requirement is higher.
>
>In amplifier that are not neutralized, this can cause the tubes to 
>oscillate ... 

//  In Eimac's *Care and Feeding...*, a method of neutralizing push-pull 
G-G amplifier is discussed.  However, neutralization of single ended G-G 
amplifier is not discussed.   The reason seems to be that there ain't no 
such animal.  I spoke with a guy who owns two AL-1200s.  The newer one 
was "neutralized".  The older one was not.  He said that the older amp. 
is more stable.  
> ... 
cheers

-  R. L. Measures, 805.386.3734,AG6K, www.vcnet.com/measures.  
end


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