[RTTY] FSK

[Tom Osborne]

>
> Then exactly what is the true definition of FSK ?
>
> Ed W3NR

In the 'Olde Days', it was frequency shift keying.

You actualy  built a circuit into the VFO that would shift freqency 850 (or 
170 later) cycles.

There were problems with some VFO's that doubled or tripled to get to the 
higher frequencies.  Sometimes you had to built a circuit for each band. 
Lots easier now.  73
Tom W7WHY