[AMPS] Series C at tube

[2]

>
>> 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.
>
¿Fact?  Q = XC-tune/RL.  Two tubes doubles I-anode, which cuts RL in 
Half. and doubles the pF required for C-tune.  However, two tubes doubles 
C-anode.  Thus, "System" Q remains constant provided that C-tune is set 
to a higher value during tune for max P.out with max drive tuneup.  

---  Free, unsolicited advice.  It has been my experiences that 
words/phrases such as:
/  That is a lie.
/  This is a fact.
/  As a matter of fact,
/  I am telling the truth.
/  I would not lie to you.
/  I am not going to lie to you.
/  Mr./Ms. ___ is a liar.
/  Actually ...
/This is the absolute truth.
... are clues. 

cheers


>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 

-  R. L. Measures, 805.386.3734, AG6K, www.vcnet.com/measures.  
end


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