[Lowfer] Hifer FSK?

[Bill Ashlock]

>At best that's a lousy way to FM a crystal oscillator.  For the small
>shifts which would probably be employed in a beacon a varicap in series
>with the crystal would be preferred.  You might have to build the
>oscillator but that's no big deal.

Ed, the Xtal route is that's exactly what I've been using over the last four 
years with my patented slant ID - and the FM modulation possibilities are 
much wider than the .2 to .5 Hz I typically use on QRSS30 and 60..... 
possibly 500ppm or 100Hz!

I still wouldn't rule out FM modulation of the Epson oscillators as long as 
most of the ID occurs when the Vcc is at 6v. This way the base line of the 
signal should be flat and of course that's all that counts, right? Could be 
an easy way to achieve some unique IDing - and that's worth a million when 
it comes to finding a beacon in a screen full of noise and misleading 
signals.

Bill A

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