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Re: [Amps] Parasitics & Filament Sag

To: <amps@contesting.com>
Subject: Re: [Amps] Parasitics & Filament Sag
From: "Jim Forsyth" <jim@forsyth.net>
Date: Mon, 4 Sep 2006 07:39:29 -0700
List-post: <mailto:amps@contesting.com>
The problem is your courses only taught a superficial view of the subject 
based upon approximations. Peter is describing exact circuit analysis 
results and he is correct.

Jim, AF6O

>    Whoa Nellie! The way reactances are taught here are: XL) XL=2*p*f*L 
> where as p= 3.14 (for all practical purposes), f= frequency, and L= 
> inductance in henries. Then XL is the reactive component in ohms. XC= 
> 1/2*p*f*C, where C= capacitance in farads. Like wise, XC is the reactive 
> component.
>    Never in the course of any electronics training and basic AC theory (at 
> least here anyway) has the circuit resistive component been used in 
> computing capacitive or inductive reactance. It IS used in determining the 
> overall "circuit Q", but it is done completely and independently of the 
> reactance computations.



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