Re: Simulcasting on the same frequency

["Paul R Hopfgarten" <hopfgapr@sprynet.com>]

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> From: Dan Strassberg 
.
> >
> In the case of the stations you name, it would work fine, because the
> coverage really doesn't overlap. Down here we have WLLH (1400) which has
two
> synchronous transmitters, one in Lowell, the other in Lawrence, ten miles
or
> so away (someone will post the exact distance, I'm sure). The coverage
> overlaps severely and the station used to synchronize the carriers within
> about 0.1 Hz to minimize the beat-frequency effect between them. Although
> WLLH may have actually sent the carrier between the sites via coaxial
cable
> at one time, I believe that for many years, the "synchronization" was
> accomplished simply by using extremely well-matched crystals. Lately, the
> carriers have drifted apart and nobody seems to be doing anything about
it.
> When the carriers are not well synchronized and you're in an area where
the
> neither signal is much stronger than the other, the result is a signal
that
> only a DX enthusiast would be likely to tolerate.

Dan, I'll vouch for that...WLLH has sort a "weaving" sound to it, and you
can distinctly tell that there are 2 broadcasts, sounds like s**t from here
in Derry

Paul Hopfgarten
Derry NH

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