[Amps] R. MEASURES PRAYERS ANSWERED

[Peter Chadwick]

Resonance is best defined as the voltage and current applied to the circuit are in phase: thus what happens in any branch is immaterial. Using that definiton, you have a definition that applies to both series and parallel circuits, regardless of Q.

>My dummy load is non-resonant, so that's a problem?<

As long as V and I are in phase it looks resistive, whetehr it's a tuned circuit or a resistor. Looked at as a single port network at one frequency, you couldn't tell if it was a resistor or some sort of tuned network.
And I saw a recent equipment standard where a 'artificial antenna' was (badly, in this case)  defined as a 'substantially non radiating tuned load'

The 'XL = XC' definition is not a good one: it's either been adopted in the Extra exam because those producing the questions don't appreciate the problems when Q is low (or don't understand AC theory), or alternatively, they feel that the oversimplification is a good thing. But it does break the usual rules for producing multiple choice  (otherwise known as 'vote for Joe') exams.
73
Peter G3RZP