[Amps] Parasitics & Filament Sag

[Mike Sawyer]

Peter said: 
    "Because the 'XL' is really sq.rt (XL^2 + RL^2) and the 'XC' is really sq..rt (XC^2+ RC^2) where RL and RC are the series resistances of the inductor and capacitor respectively. If you take the case where Q=5, then the 'XL'  becomes an impedance of 1.1XL with a phase angle of 78.7degrees, rather than 90"


    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.
Mod-U-Lator,
Mike(y)
W3SLK