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- Path: sparky!uunet!infonode!umagic!f2.n373.z1.FIDONET.ORG!Lynn.Hollerman
- From: Lynn.Hollerman@f2.n373.z1.FIDONET.ORG (Lynn Hollerman)
- Sender: ufgate@umagic.FIDONET.ORG (newsout1.26)
- Newsgroups: hsv.general
- Subject: Re: Where do all those AM stations come from?
- Message-ID: <6432.2B0943C8@umagic.FIDONET.ORG>
- Date: Tue, 17 Nov 92 09:59:22 CST
- Organization: FidoNet node 1:373/2 - Gateway, Huntsville AL
- Lines: 82
-
- TO: greg@cherokee.b23b.ingr.com
-
- GM> Why -- is because the signals from AM bounce off the atmosphere
- GM> at night and land on your radio's antenna. That way, a signal
- GM> from, say, Chicago can make it to here while a signal from,
- GM> say, Memphis is blocked by the hills (and eventually the
- GM> curvature of the Earth) from making it here.
-
- Well, yes, that's pretty much it...when the sun goes down, a layer of
- the atmosphere called the ionosphere builds up. It's mainly off the E &
- F layers of the ionosphere that the AM radio signals skip...most of the
- ionosphere burns off as the sun rises during the day, only to build up
- again at night...some of the stations you mentioned are audible during
- the day, thru ground wave propogation...this means the wave travels a
- path thru the ground and the curvature of the earth is important...you
- can hear KBOA-830 from Kennett, MO most mornings during the day...but
- when the sun goes down, 830 is taken over by WCCO out of
- Minneapolis/St.Paul...this is a 50kW station, much stronger than KBOA's
- 10kW, and depending on your location, you may get WCCO's atmospheric
- skip signal much better...
-
- GM> If you hear an underlying Spanish language broadcast, it comes
- GM> generally, from Mexico. I think those signals have been
- GM> bounced off the atmosphere then the Earth then the atmosphere
- GM> again. Some of the Spanish language programs undoubtedly come
- GM> from Florida or Texas, but I haven't been able to locate one
- GM> for sure.
-
- Oh, maybe, but Cuba's awful close to us, globally speaking...try 710 or
- 640 late in the evening and listen for a beeping noise...that's Radio
- Reloj from Cuba...a news service...or for some US-originated
- "propaganda" in Spanish, try Radio Marti on 1080...they're in South
- Florida...the Mexican stations, like XEWA on 540, are more prevalent in
- the western US...
-
- GM> Here is what I came up with:
-
- You know, what you're doing is called "DXing", or long distance
- reception...it's one of my favorite pasttimes...I've logged over 1500
- stations since I was 11 or 12...there are clubs, like the
- International Radio Club of America or the National Radio Club that
- specialize in broadcast band (AM) DXing...there're some errors in the
- list you produced...I won't quote it for the sake of brevity...and
- there's plenty more I could add...there's a station to be heard at
- every frequency on the AM dial...and you can do it here, on your
- average car radio...all it takes is patience, and a LOT of free
- time...I won't go into the difference between clear channel, regional,
- and local stations and why you can hear stations like WLS-890 from
- Chicago during the day right now...it would take too long...but if
- you're interested, there are some members of the International Radio
- Club of America (IRCA) here in Huntsville...we had our yearly
- convention at the Holiday Inn at Madison Square Mall in August...you
- might write for a sample issue of our publication, the DX
- Monitor...in it are the reports from various members about the domestic
- and foreign stations they've heard of late, as well as some tips and
- techincal stuff. Just send $1 to:
-
- The International Radio Club of America
- 11300 Magnolia #43
- Riverside, CA 92505 USA
-
- I know the kind of list you're looking for...gas stations used to
- include a list of stations on the maps they gave out...but these days,
- you'll find a pretty comprehensive list in the World Radio TV Handbook
- (WRTH), available at most bookstores...but this is published yearly,
- and the 1993 edition is about to be released, so now might now find too
- many of them in bookstores. I don't know if the Huntsville library has
- any back editions...if they don't, they should, since that's what the
- radio clubs ask their members to do with the old editions. If you want
- to get technical, you could also get an NRC log or and IRCA
- Almanac...both list AM stations, and the Almanac has lists of the
- various programs and what station airs what. And by the way, WAHR is a
- local FM station, 99.1 mHz...on 990 kHZ at night, you're likely to hear
- WRJZ in Knoxville, TN...
-
- Lynn.
-
-
-
- --
- = Micro Magic, 830-2362, Alabama's Usenet/Fidonet gateway.
- = Reply-To: Lynn.Hollerman@f2.n373.z1.FIDONET.ORG
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