[GreenKeys] Wobbly FSK ?

[WA5CAB at cs.com]

Phase Modulation might or might not be detectible to the ear.  Besides 
being down at 200 CPS, the phase shift is if I recall correctly typically +/- 
180 degrees peak to peak.  Most people couldn't hear any wobble. even on a 
steady MARK.

In a message dated 08/02/2011 16:06:46 PM Central Daylight Time, 
wa2hwj at att.net writes: 
> Heck...my Heathkit DX-40 and VF-1 wobbled on RTTY all the time!
> 
> K0TTY
> 
> 
> 
> -----Original Message-----
> From: greenkeys-bounces at mailman.qth.net
> [mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of Jim Haynes
> Sent: Tuesday, August 02, 2011 3:10 PM
> To: Nick England
> Cc: Greenkeys
> Subject: Re: [GreenKeys] Wobbly FSK ?
> 
> I've never heard of it before.  What time period do you think this
> came
> from?  I assume it was back when everybody was using 850Hz shift and
> fairly wide filters to accomodate drift in the transmitter and
> receiver.
> How rapidly does it wobble?
> 

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480