>
>Sorry, brain slipped out of gear. Meant Series L.
>cheers
// More tubes in parallel proportionately lowers RL and
proportionately increases the amount of C-Tune needed to achieve the
desired Q of 10 to 15. Thus, using 1, 813 or 6, 813s is essentially the
same game. More tubes simply means Lower RL, More C-tune/C-load, Less
tank L, and More RF circulating current (approx. = Q x I-anode.). This
matter is yet another one of amateur-radio's, brain slipped out of gear,
tired old wives' tales.
cheerio, Barry.
--------------------
>Barry Kirkwood PhD ZL1DD
>Signal Hill Homestay
>66 Cory Road
>Palm Beach
>Waiheke Island 1240
>NEW ZEALAND
>www.waiheke.co.nz/signal.htm
>----- Original Message -----
>From: Tom Rauch <w8ji@akorn.net>
>To: Randall DuCharme <kd5izi_tech@yahoo.com>; <amps@contesting.com>; Barry
>Kirkwood <bjk@ihug.co.nz>
>Sent: Thursday, 20 September, 2001 8:29 PM
>Subject: [AMPS] Series C at tube
>
>
>>
>> > knowledge of use of more than a pair of them. They have rather high
>> > output capacitance, therefore a tad of series C from plates to the
>> > tuning cap is a good idea.
>>
>> Why? It certainly does not lower system Q. As a matter of fact, it
>> raises system Q.
>>
>> It is a popular misconception passed along among VHF operators
>> that a small series C between the tube an tank lowers Q. It
>> actually does the opposite.
>> 73, Tom W8JI
>> W8JI@contesting.com
>>
>> --
>> FAQ on WWW: http://www.contesting.com/FAQ/amps
>> Submissions: amps@contesting.com
>> Administrative requests: amps-REQUEST@contesting.com
>> Problems: owner-amps@contesting.com
>>
>>
>
>
>
>--
>FAQ on WWW: http://www.contesting.com/FAQ/amps
>Submissions: amps@contesting.com
>Administrative requests: amps-REQUEST@contesting.com
>Problems: owner-amps@contesting.com
>
>
- R. L. Measures, 805.386.3734, AG6K, www.vcnet.com/measures.
end
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