[AMPS] Tube load resistance calculation

[Rich Measures]

>
>My ARRL handbook gives the following formula for calculating the load 
>resistance
>of a vacuum tube power amplifier:
>
>        Vp
>  Rl = ----
>        KIp
>
>where K is 1.5 for class AB, 1.57 for class B, and 2 for class C.  I'm not 
sure
>how they get this constant, and I wonder if it has anything to do with the 
duty
>cycle of the signal being amplified:  in other words, I wonder if these
>constants would be different for a CW or voice signal?  My guess is probably
>not.  Is this correct?
>
yes.  My guess is that a more accurate calculation of RL would be based 
on peak anode current and peak anode-voltage change.  

-  later, Vic


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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