[ScanIndiana] RF interference in Michigan City
Tim Volckmann
kb9orj at yahoo.com
Sat Aug 21 01:29:42 EDT 2004
Well,
I happen to be a broadcast engineer..heheh...
Hope its not one of my clients... LOL...
Seriously.. the best way to find it is carefully
describe to us the type of sound, static or
whatever...exactly what time it happens...does it
happen during the same times everyday or various
times... yada yada...could be anything...if your on
far side of 94 lots of strange things down there...
and for kicks and giggles...WLS is a 50kw "clear
channel" station.. not required to change pattern...
back from old Conelrad setup days...check that out for
some good readin... :)
Tim KB9ORJ
Lightning Communications
Michigan City, IN
www.lightningcom.com
--- Daniel Heaton <drheaton48 at msn.com> wrote:
> Is 5:10 am Sunrise ?
> Many AM stations change their transmission/antenna
> propagation patterns at
> sunrise and sunset.
> Usually this takes only a second.
>
> WOWO used to play a "goodbye moon hello sun" jingle
> followed by a second of
> static to mark the change, on other stations (WIBC)
> you loose a word, right
> in the middle of a sentence.
>
> But if this particular station actually uses a
> different transmitter,
> perhaps it is not fully 'warmed-up' and not at full
> power for 10 minutes.
>
> Or the new propagation pattern may not be as good
> for you at your location.
> Or perhaps the atmosphere takes 30-60+ minutes to
> change from daytime to
> nighttime conditions, and the transmitter changes in
> a second.
>
> I am not a radio engineer, so this is a stretch for
> me, but I think it is
> accurate.
>
> Thanks, Dan
>
>
> >From: Ryan Henry <rrhenry at csinet.net>
> >Reply-To: Indiana Scanning
> <scanindiana at mailman.qth.net>
> >To: <scanindiana at mailman.qth.net>
> >Subject: [ScanIndiana] RF interference in Michigan
> City
> >Date: Wed, 18 Aug 2004 20:18:58 -0500
> >
> >A liitle of topic, but does anybody know what might
> be causing the
> >interference with my AM radio. It happens every
> morning at about 05:10, it
> >last 10 sec. and stops then starts again, like
> something is starting up.
> >Happens at home, car doesn't matter. The whole
> thing last about a minute.
> >I live on the far south side of Michigan City,
> about a half mile south of
> >I-94. Thanks
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