Re: What is Q?

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Herwig Roscher by way of Terry Fritz <twftesla-at-uswest-dot-net>" <herwig.roscher-at-gmx.de>


Corey May wrote:

> Hi, I was wondering what is the Q or Q factor is...whatever it is
> called?

Corey,

Q or Quality factor by definition is: reactance divided by loss. For 
coils this means:

				Q = 2 * pi * f * L / loss

For "loss" you need to use the AC resistance which will be higher 
than the DC resistance (maybe 3 or 4 times higher) due to skin 
and proximity effects.

Regards,

Herwig