I don't get it: Virtually any quartz watch are very accurate and works in a
quite sophisticated environment: no matter if you ware it or put it down
into a cool place... Those watches are not even expensive -- the most
expensive part of such a watch is the case and the package they put it in,
anyway. So why is that could be so accurate while the crystal you
use cannot?

Tamas



On 18/07/06, Howard Winter <HDRW@h2org.demon.co.uk> wrote:
>
> On Mon, 17 Jul 2006 11:25:33 -0700 (PDT), trossin wrote:
> >...
> > The other fun fact is that the frequency of the oscillator is
> temperature
> > dependent.  Years ago folks would put their crystals in mini crystal
> ovens
> > and regulate the temperature to get a very stable source.
>
> When my grandfather died (he's had a radio shop in London in the 1920s and
> '30s) I was allowed to go through
> his workroom to see if there was anything I could use (I ended up with an
> AVO model 6).  I found a number of
> crystal ovens, but I hadn't got a use for them at the time so I left
> them.  But I've been wondering since then
> why they don't seem to exist these days?  Are modern crystals more
> temperature-stable, or is there some other
> reason why we don't try to keep them at a constant temperature nowadays?
>
> Cheers,
>
>
> Howard Winter
> St.Albans, England
>
>
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