[sdiy] Give me an 'A' !!

[Batz Goodfortune]

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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