[BC] 4-400s Versus 833s

[Tom Dimeo]

Is it correct that the driver for triodes had to be modulated 
to maintain proper linearity?  Was this the case for the 
4-400s too?

** W2XJ Wrote: **
>I have always felt that way about 4-400s. An 833 equipped 
>transmitter had tube life measured in years. A new 20V3 with 
>4-400s went 6 to 9 months on a set of tubes. I have always 
>felt that it was just false economy, especially when 
>electricity was dirt cheap. I think the argument about 
>fidelity is somewhat misleading.  The Iron in a plate mod 
>transmitter is the primary thing that determines fidelity.