>
>-----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.
>
Probably less than 6A for SSB. However 6A @ 28MHz is similar in heating
ability to 30ADC.
cheers, Mauri
>
>
>
>
- Rich..., 805.386.3734, www.vcnet.com/measures.
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|