[Amps] grid resonance

[Tom W8JI]

> Actually, the GDO won't measure a parallel resonant 
> circuit!
> Just consider what happens. We'll put a coil in parallel 
> with a capacitor, and couple (magnetically) the GDO to the 
> coil. The magnetic field from the GDO coil induces a 
> current in each turn of the coil to which it is coupled. 
> The current induced is in series with the coil, and so the 
> circuit is really a series resonant circuit, not a 
> parallel one. The same thing happens with link coupling to 
> a parallel L and C.

Careful Peter! The next thing you will be telling us is the 
GDO won't measure Q or impedances, and then some might 
realize what a nice house of cards can be built by misusing 
or misunderstanding basic test equipment.

73 Tom