[Amps] Bill Orr comment

[Roger (K8RI)]

Gudguyham at aol.com wrote:
> I was reading the Bill Orr handbook and on his section about amplifiers he  
> says.....A properly designed grounded grid amplifier should produce 2 to 2.5  
> times the plate dissapation of the tube  in output.  He did not put  any 
> limitations on the statement as to IMD or anything like that.  He did  not say if 
> the tubes ratings would be surpassed (I am sure they would), but I  think what 
> he was saying is that the tube should continue to make power to 2 to  2.5 times 
> it's dissapation before it would not make any more power and flatten  out.
>   
I see more than a little ambiguity in that statement.  Did he mean under 
normal operating conditions the output power will be 2 to 2.5 times the 
power "being dissipated" by the tube or that a tube of a given plate 
dissipation (say a 1000 watts) could put out 2 to 2.5 times that rating 
(2 to 2.5 KW in this instance)  Was it a poor choice of words and which 
did he mean? My first thoughts were he meant the first, but then the 
first answer I saw referred to the second. The second would depend on 
the emission characteristics of the  cathode and the class of operation.

73

Roger (K8RI)