[Lowfer] Hifer FSK?

[Bill Ashlock]

John D and group,

>Any of the designs using the Epson programmable oscillator ICs can be
>frequency shifted with a relatively small variation of Vcc.  Might be worth
>a bit of experimentation.

Thanks to Eric for the reference to Lyles good Epson Oscilator article. 
Turns out that a drop in Vcc from 6v to 2v produces an increase of ~ 0.3 
ppm. This is ~0.5 Hz at 1.704 MHz for the Medfer application and ~5 Hz at 
18.572 which approximates the Hifer application.

Lyle: Was this a quick change in frequency or one relating to an internal 
heating effect (or both)? I noticed that the input power drops considerably 
for the 6v to 2v Vcc change.

Bill A

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