[AMPS] 3/2 power law and Rich's very wide signal

[measures]

>
>measures wrote:
>>>Rise times on the order of 100 microseconds to 500 microseconds are what 
>>>I've measured in the past.
>>>
>>Agreed.   Do you feel that a typical screen bypass C can be fully charged 
>>in 100uS in a DAF amp.? This is the real issue here.  
>
>Or was that 2 milliseconds?
>
fair point, Ian.  My guess is that 2mS would not be doable in a typical 
8171 amplifier.  So why try?.  Holding the screen potential at the needed 
1500v solves the distortion problem provided that grid-current is 
virtually zero.  .  

>>My guess is that 
>>Mr.  Thornley was not able - or was too lazy - to build a proper screen 
>>supply and  bias supply  .  
>>
>
>If Mr Thornley were still alive, you'd very quickly regret making that
>cheap shot.
>
  not a sound bet, Ian.  Mr. Thornley did not construct a proper screen 
supply.  He needs to explain why.      //  After reading the orig. 
article, my guess is that Thornley was not aware of why one needs to have 
constant screen potential applied Before RF arrives.    //  Eimac, 
Amperex, Philips, Svetlana and RCA recommend regulated screen potential 
for tetrodes in AB linear service   Could they all be out of step except 
Mr. Thornley? 

cheers

-  Rich..., 805.386.3734, www.vcnet.com/measures.  
end


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