Re: [ARSCLIST] FM reception way back when

[George Brock-Nannestad <pattac@xxxxxxxx>]

From: Patent Tactics, George Brock-Nannestad

Hi Folks,  Bob Cham wrote:

............
> 
> The problem lies with the multiplex system that we use.  When FM went 
> STEREO, the FCC didn't want to obsolete all the mono receivers, as 
> they had when the band changed frequency.  Thus we broadcast L+R 
> (mono), and L-R, which are combined to make stereo.  It doesn't 
> exactly make for a robust stereo signal, but it is compatible.
> 

.......................

Isn't the problem that in stereo, the pilot tone (multiplied by two) is AM 
modulated by the L-R and not FM at all? This was the system that won out.

Kind regards,


George