[ScanIndiana] RF interference in Michigan City

[Daniel Heaton]

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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