In article ,
Telamon wrote:

There is another station near but not on channel that plays havoc with
the BBC on 7160. The carrier off something like 1 KHz is the main
problem. I again have to listen sync selective sideband on 7160 or use
the notch filter.

I think that's the second harmonic of the TV color burst frequency.
A lot of consumer electronics run their micro/TV video chips on
7.15909, or 14.31818 MHz resonators or xtals. And since the damn things
are always on to "listen" for remote control commands...

Mark Zenier
Googleproofaddress(account:mzenier provider:eskimo domain:com)