[AMPS] Tube rating question

[Terry Gaiser]

The Eimac data sheet for the 3CX800A7 was an after thought. The tube had
been developed and rated at 1370 watts output with "typical" operation
at 2500 volts at 800 ma. THEN the FCC changed the power limits to 1500
watts OUTPUT and Eimac then changes the ratings on the tube for 2200
volts at 500 ma. operation and 750 watts output which is what the
technical data sheets show.
Terry W6RU

Vic Rosenthal wrote:
> 
> Eimac's data sheet says that the 3CX800A7 has a plate dissipation of 800 watts.
> But then they say that it '...will deliver 750 watts PEP and 750 watts keydown
> CW output to 350 mHz'.
> 
> I don't think they're talking about class A, are they?  If an amplifier were 65%
> efficient, I would expect to be able to get around 1200 watts from this much
> plate disssipation.  What am I missing here?
> 
> 73,
> Vic, K2VCO
> Fresno CA
> 
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