[sdiy] The Origins of Q

[harrybissell]

Isn't "Q" the guy who supplies the neat toys to James Bond...

This one, James... will do any filter response you need and fits in a
ballpoint pen...

H^) harry (quality!)

john mahoney wrote:

> Q refers to the Quality of a filter. ("Quality" is apparently defined as how
> resonant the filter is.)
> --
> john
>
> ----- Original Message -----
> From: "Glen" <mclilith at charter.net>
>
> > Please, help me settle something.
> >
> > How old is the term "Q", as used in electronics? I imagine it was used in
> > the early days of radio broadcasting, because the Q of various RF circuits
> > was a big concern to radio designers, but does it predate this? Does
> anyone
> > know the history of the term? When was it first put into use?
> >
> > As you can imagine, searching Google for the letter Q isn't very helpful.
> :)
> >
> > I'm hoping that maybe one of our old-timers might remember the story of Q.
> ;)
> >
> > (This old-timer seems to have forgotten it.)
> >
> >
> > thanks,
> > Glen