Re: crystal oscillator

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

Original poster: "Jim Lux by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jimlux-at-earthlink-dot-net>

Crystal oscillators work at 32.768 kHz in most watches.

The radiated field from a TC (as many have pointed out) is not all that
high (particularly for higher frequencies), so the high harmonic content of
a conventional spark gap (disruptive) coil probably doesn't present a great
problem.

A class AB amplifier will be less efficient (in a wall plug to RF sense)
than a well designed Class C tube coil or a spark gap coil.

Tesla list wrote:
> 
> Original poster: "by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<Hollmike-at-aol-dot-com>
> 
> Billy,
>   Is there even a crystal oscillator that operates in TC frequency range?   I
> could imagine such a system working if so, but I think a tube coil would be a
> better way to go.
> Mike
> 
> >
> > Hello all,
> > I had a quick conversation with an old timer the other day.(He built a TC
> > "maybe 50 years ago".He was pretty concerned with the coil interfering with
> > the
> > neighbors reception etc.Anyway, he said to wind it to an industrial
frequency
> >
> > and use a crystal oscillator with a clean class AB linear power amp to
drive
> > it.Could someone explain this setup to me? I think I read once that the
amps
> > were inefficient for this use.
> > Thanks
> > Billy Mck