[sdiy] Give me an 'A' !!

[Tim Ressel]

Hey, how about that! first frequency I tried:

5.0688 MHz / 11520 = 440 Hz.

--TR

--- Batz Goodfortune <batzman at all-electric.com> wrote:
> Y-ellow Tim 'n' all.
> 
> At 07:55 AM 10/16/02 -0700, Tim Ressel wrote:
> >To all,
> >
> >I seem to recall the old Moogs had a built-in
> >calibrator which produced A-440. How was this done?
> >Was it accurate? Is there a crystal that will
> divide
> >down to 440hz?
> 
> A quick play with the calculator didn't yeild
> anything exact. Several 
> almost-magic numbers came up but not quite. However
> the percentage 
> difference may have been negligible. I didn't have
> time to check.
> 
> I don't know about how this was done in moogs if at
> all. However one place 
> I worked needed a strange and somewhat esoteric xtal
> for some box we made. 
> There was a guy across down who just happened to
> custom make xtals and all 
> we had to do is bake them. But I don't know the
> process as I didn't have 
> anything to do with that stuff. But the point is,
> that back in the 60s, 
> Moog may have considered having custom tuned xtals
> an economically viable 
> thing to do since this kind of stuff was more common
> back then. People who 
> make custom xtals were a dying breed back when we
> were having them made, I 
> don't know if anyone would still do that now? Not
> here anyway.
> 
> Of course he could have always electrified a tuning
> fork Ah Lah Rhodes. :)
> 
> Be absolutely Icebox.
> 
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