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[AMPS] Pi-Net math

To: <amps@contesting.com>
Subject: [AMPS] Pi-Net math
From: measures@vc.net (Rich Measures)
Date: Thu, 5 Aug 1999 15:53:13 -0700


>
>Rich Measures wrote:
>>>>?  There is more than one way to figure Q.
>>>
>>>Evidently - like to tell us your definition?
>>>
>>?  I don't have one.  Eimac defines Q as the ratio between RL and the
>>reactance of C1.  None of the Eimac formulae can be used without choosing
>>a value of Q - as defined by their definition
>>.
>I can't believe I'm reading this. If you truly believe that the
>definition of a quantity like Q is something that can change according
>to whose pi-network formulae you use, then - I'm sorry, but it has to be
>said - you literally don't understand the first thing about circuit
>analysis. 

?  There are nevertheless two ways to define Q.  
>
>>>The definition I'm using is Q = XL/Rs, where Rs is the transformed
>>>effect of all resistive components, when made to appear in a series loop
>>>with L.
>>>
>>?  A definition which does not work with Eimac's formulae.
>>
>I still can't believe I'm reading this!
>
?  You can read it on pages 35, 36, and 37 in *Care and Feeding of Power 
Grid tubes.  Q is used in all three formulas.  Q is not calculated.  Q is 
selected by the designer.  
>
?  Ian:  Is an L-network resonant?
-  thanks


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


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