Re: A few Q's

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

Original poster: "Steve Greenfield by way of Terry Fritz <twftesla-at-qwest-dot-net>" <alienrelics-at-yahoo-dot-com>

--- Tesla list <tesla-at-pupman-dot-com> wrote:
> Original poster: "Antonio Carlos M. de Queiroz by way of Terry
> Fritz <twftesla-at-qwest-dot-net>" <acmq-at-compuland-dot-com.br>
> 
> Tesla list wrote:
> > 
> > Original poster: "Terry Fritz" <twftesla-at-qwest-dot-net>
> 
> > High Q things have low losses while they oscillate and thus can
> oscillate
> > for a long time.
> > 
> > As you can imagine, giant math equations can be tied to all
> this too...
> 
> An useful quantitative relation for Q: It is the number of
> oscillation
> cycles observable before the oscillation is too small. (Too small
> here
> is with 1/23 (1/e^pi) of the starting amplitude, to be more
> exact.)
> 
> Antonio Carlos M. de Queiroz

I thought it was the point at which the peak reached 0.707 of the
original amplitude. That sticks in my head, maybe that was a rule
of thumb for something else.

Steve Greenfield