Vintage Synth Repair

3.58Mhz was a very popular frequency, used in all color tvs. Try using that, or another crystal or oscillator, and measure the output frequency of 1 of your notes and then figure out the ratio and you'll get to the right frequency.  Note there are more digits to the 3.58, so find them before calculating.  Could look up the processor or freq gen chips, too, for a hint!, too! 
-Hugh

--- In vintagesynthrepair@yahoogroups.com, "max_61_it" <flickino@...> wrote:
>
> Hi folks!
> Somebody can help me please?
> I've got an E-Mu Vintage Keys expander without the crystal oscillator (quartz) Y1 mounted on it.
> Since it's impossibile to find a schematics for this instrument, somebody of you can tell me the frequency of that crystal?
> Thank you very much.
> 
> Max
>