[Amps] Lowest distortion required - Was: Designing the Cleanest Linear with RF Negative Feedback

[GGLL]

	Which is the main purpose to design an RF class A stage at high power
levels?, if with AB1 one can accomplish the required (and even more) the
unwanted signals attenuation with better efficiency. Any special mode of
transmission?, or in those situations where there are several transmitters
operating at the same location?. Some audio fanatic like mania?.


TIA
Best regards
Guillermo - LU8EYW.

TexasRF at aol.com escribió:
>  
> Doesn't grounded grid/cathode driven operation provide much if not all of  
> the degeneration/negative feedback we are discussing here?
>  
> 73,
> K5GW
>  
>  
>  
>  
> In a message dated 12/14/2005 11:10:17 P.M. Central Standard Time,  
> K1JJ at comcast.net writes:
> 
> Correction:
> 
> It was pointed out to me that the cathode resistor  for negative feedback is 
> to be used only for a grid driven [grounded  cathode] amplifier to generate 
> degenerative [negative] feedback.
> 
> In  a cathode driven [GG] amplifier, the cathode is in phase with the plate  
> and it will not work. A different method must be used for neg  feedback.
> 
> This is why my GG triode did not show any diffence in drive  when I  tried 
> the cathode resistor.
> 
> I saw the idea in the  archives and must have missed the fact that they were 
> talking about grid  driven amps at the time.
> 
> 73,
> Tom, K1JJ  
> 
> _______________________________________________
> Amps mailing  list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
> 
> 
> 
> 
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
>