Frequency accuracy?

[Jim Coleman, Sr.]

Hi Frank:

By "older machines, I mean the ones with the buttons instead of the membrane
face, i.e. the machines before AccuTuner I and II. The SAT I, II, and III
have sophisticated temperature compensated control to keep them in
calibration with the quartz crystal. Any machine which has been upgraded to
FAC capability has the newer technology.

Jim Coleman, Sr.

On Sun, 20 Jun 1999, Frank Cahill wrote:

> Jim Coleman, Sr. wrote:
> > 
> > Hi Robert:
> > 
> > In the calibrate mode, the program and machine are being calibrated to
> > the internal quartz crystal frequency.
> > 
> > On the newer machine which are temperature compensated, they stay in
> > calibration very well.
> > 
> > The older machines tend to drift a bit, hence the need for calibration.
> > 
> > Jim Coleman, Sr.
> > 
> > 
> Jim, what's older mean? 5 years or more?
> > >
> > >
> > >
> 
> -- 
> 
> Frank Cahill
> Associate Member, Piano Technicians Guild
> Northern Va
>