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[AMPS] tuning capacitor & insulator

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Subject: [AMPS] tuning capacitor & insulator
From: (
Date: Fri, 18 Dec 1998 01:27:43 -0500

On Thu, 17 Dec 1998 16:25:34 -0800 Rich Measures <>


>>No criticism of Rich's particular design; the limitation is in the 
>?  Did you perhaps presume that the 7580 has the same power capability 
>a 4CX250B?

Presumption or fact Rich?  Yes the 250R and 7580 ( not exactly the same
tube either) have somewhat different specs than the 250B ,  but they
still have identical cathode emission.
So due to internal design only the R version is a bit more linear but
still suffers from the same maximums as the 250B.
I went thru this at length when Collins Engineers introduced the
AN/URC-32 to the Navy and I was part of the evaluation team ( as a lowly
tech that did all the real work !) 

73  Carl  KM1H

>-  later, Ian
>R. L. Measures, 805-386-3734, AG6K,  
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