[Amps] Fwd: Pi-L In-circuit Adjustment Question

[Steve Thompson]

G3rzp at aol.com wrote:
> In a message dated 20/02/2005 10:34:05 GMT Standard Time, r at somis.org
> writes:
>
> A  Pi-network is not resonant because it is two L-networks in series,
> and  L-networks never operate  at resonance.
>
>
>
> This depends upon your definition of resonance. The only definition
> that is mathematically applicable to all tuned circuits is that the
> applied voltage
> and  current are in phase. Under these circumatances pi and L
> networks are resonant.
Surely any definition of resonance has to cover all branches of physics,
including weights on springs, air columns in tubes etc. My maths is too
rusty to work from the fundamental definition to see what it means in
electronics terms, but what ever it is, it's the one that's indisputable.

Steve



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