[AMPS] Tube rating question

[Bob Dodson WB5APD EM84ak]

Data sheet shows max Plate V=2250 and max Plate ma=600. Typical AB2 use
is Plate V=2200 and Plate ma=500

Typical Usage	2200 X .5 = 1100 watts in at 65% efficiency = 715 watts
out.

Max Usage	2250 x .6 = 1350 watts in at 65 % efficiency = 877 watts out

	Ran one on 2m and could get abt 900 watts out key down with Plate V of
abt 2300 vdc.
bob
wb5apd


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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-- 
73's
Bob Dodson
Dahlonega Ga. WB5APD/EM84AK 
"ex-WA4WQC, ex-WV6SKV"
mailto:wb5apd@stc.net

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