> I was fortunate to find a vintage, General Radio (GR) Model 723D
> Precision Oscillator (tuning fork).
>
> The exceptional wooden case is as 'exciting' to look at as is the
> mechanical tuning fork inside (400Hz).
>
> As it is ac powered, I'll need to recap it before I turn it on.
> Then, we can test for accuracy! (sic).
>
> A real class-act, 'time-nut' oscillator from the last century,
> predating crystals.
>
> Don
>
> Don Lewis
> Austin, TX
> N5CID
>
>
>
>
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