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R: R: SV: [AMPS] Re: SB220 problem

To: <amps@contesting.com>
Subject: R: R: SV: [AMPS] Re: SB220 problem
From: Maurizio Panicara" <i4jmy@iol.it (Maurizio Panicara)
Date: Thu, 11 Nov 1999 12:37:17 +0100

-----Messaggio Originale-----
Da: measures <measures@vcnet.com>
A: AMPS <amps@contesting.com>
Data invio: giovedì 11 novembre 1999 6.25
Oggetto: Re: R: SV: [AMPS] Re: SB220 problem

> >PS In a standard SB 220 the RF current is no more than 5-6 A.
> >
> The Q on 10m is approx. 13 and the anode current is 0.8A.  That's more
> than 5 to 6A of circulating currrent
> >

The calculation done with .8A of plate current drain, a Q of 13 and a full
input carrier is close to 10A.
In real operations, the average current, what finally produces heating in
the PI switch finger, is much closer to 6A (or less) than 10A.

73,
Mauri I4JMY





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