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[AMPS] More ? on Supercathode drive

To: <amps@contesting.com>
Subject: [AMPS] More ? on Supercathode drive
From: measures@vc.net (Rich Measures)
Date: Sat, 26 Sep 98 16:40:11 -0800
>
>.......Scott Townley said:
>Some have said that supercathode drive isn't very practical, and that may
>be so, but I'd like to gain a better understanding of why it isn't.  

Because a power gain of 3 to 4 is poor.  Large tetrodes have power gains 
of c. 100.  

>Also, because I don't have any screen supplies available (although I suppose I
>could just divide down the plate).

For <800v screens, a zener-string (15 to 30v 5w rating) shunt regulator 
biased with a resistor connected to the anode supply is preferable. 
>
-  later, Scott


Rich...

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


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