RadioGuy wrote:


running dogg wrote in message ...
Yikes! The BBC's Spanish transmission on 5995 from 0300-0400 UTC has
suddenly gotten a LOT stronger! It registers as S9+50 on my Yaesu! It is
audible for 10 khz on either side of its assigned frequency, totally
wiping out Radio Havana on 6000. I can NOT receive Cuba when that
monster signal is on. I tried to tune a couple khz up and I can STILL
hear the BBC, with Cuba popping up briefly every so often. On 6003 khz I
can hear the BBC signal quite clearly, eight khz away from its assigned
spot. What should I do?

Yea... well... the VOA does the same thing with their broadcasts south...
Its a Hispanic/Latino thing and serves a purpose. All the broadcasters I've
listened to down in South America like to run their transmitters well over
100% modulation---it gives them the commanding 'Plaza Independencia'
presence---intelligibility of the broadcasts seems to be of little concern.
The same situation is now occuring in the southern US states as more and
more broadcasters become Hispanic/Laitno owned. Here where I live there are
a couple of AM broadcasters that can be heard well over 10 kHz on either
side of carrier as well. I guess the situation is made many times worse
with the Reagan deregulation; no longer are broadcast stations required to
have engineers on staff. Granted, some have engineers on contract to
maintain their station while other simply broadcast without them---the FCC
can't control the resulting mess.

The Delano transmitter-from which the BBC broadcast in question
originates-is VOA owned. Even worse, Delano, California is only about
100 miles or so south of my location, so the splatter is considerable.

Years back after returing to the US I would tune-in to certain broadcasts.
They would be plagued with an odd buzz, whine, scratch and pop. I checked
my other receivers and would hear the same thing---no matter what I would do
I could not get rid of it. I thought it was some kind of overload or weird
local noise and cranked in my attenuator and changed antennas---no cure.
One day I was tuning though the bands and I found the source---VOA
transmitter! At least 50 kHz away (if not more) and I could still hear
artifacts of their signal---listening to their Spanish language broadcasts
they were clearly well over 100%. An RF engineer I discussed the matter
with did some signal analysis and later decided not to get involved from a
fear of possible consequences. The situation is ongoing. Additionally,
there is a strong indication that certain broadcasters like to 'cozy-up' to
a station and operate in this condition so as to 'jam' a broadcast.

I suggested in this newsgroup that the BBC transmission was deliberately
placed so as to jam Cuba, and everybody dismissed the notion out of
hand. Additionally, there seems to be a strong station (BBC?) operating
on 6005 around 0400 which also interferes with the Cubans. 6000 is by
far the most reliable of Radio Havana's frequencies to NAm, and it
wouldn't surprise me if the US govt was trying to force them off 6000 or
at least make the signal impossible to hear.


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