[Amps] 833A in linear for SSB

[2]

>Mu is about 35 what is "a triode
>needs a Mu of c. 3 max."? 

**  In order for a triode to be linear in grid-driven configuration, 
grid-cuurent can not be allowed to flow.  In other words, the grid can 
not be driven positive.  Maximal cathode current flows at 0 grid-V.  
Since the only triodes that draw maximal current at 0 grid-V have a Mu of 
2-3, a tube with a higher Mu won't do.  Since considerable grid-V is 
needed to drive a low Mu triode, grid-driven triode linear amplifiers are 
impractical at HF due to grid-C.

> I am missing some a key word here I think.
>I have run a pair of 250th's in parallel GG driven by a pair of 6146B in my 
>younger years.
>1KW plate input power was the limit then so that  was my goal. They have a 
>mu of 37.

** Any triode will work in g-g linear service.  The higher the Mu, the 
higher the v-gain.  

-  R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, 
www.vcnet.com/measures.  
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