[BC] The Future

[Robert Meuser]

Mark Humphrey wrote:

> On 12/2/06, Robert Meuser <Robertm at broadcast.net> wrote:
>
>>
>> I think multiplex sites will work with much closer channel spacing
>> thanks to totally different technology.
>
>
> It's already practical to multiplex FM signals at less than 800 kHz
> spacing by installing two master antenna systems, so that the closest
> channels can be fed into different combiners, reducing loss while
> increasing isolation.
>
That has been done for quite a while I worked on a project in Paris in 
the 80s that did something similar. The was one panel antenna with both 
horizontal and vertical elements. Half the stations were V Pole and the 
other Half H pole each polarity with its own combiner.  I was not really 
thinking of FM as once you hit 400 kHz spacing by conventional means the 
it is a moot point.

I was thinking more about very closely spaced AMs using unconventional 
(by today's standard) techniques.

R

R