I know CC AM stations only go a few hundred feet, but our local college station KASC 1260 (http://radio-locator.com/cgi-bin/finder?call=kasc&is_unl=Y&is_lic=Y&is_cp=Y&sr=Y&s=C&sid=), which is not CC but merely an unlicensed AM, has been heard as far as 7 miles north and 5 miles west. How can an unlicensed station, presumably pumping out power by the milliwatt, have such coverage?
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LPAM coverage
- Thread starter ajhenderson
- Start date
> I know CC AM stations only go a few hundred feet, but our
> local college station KASC 1260
(http://radio-locator.com/cgi-bi> n/finder?call=kasc&is_unl=Y&is_lic=Y&is_cp=Y&sr=Y&s=C&sid=),
> which is not CC but merely an unlicensed AM, has been heard
> as far as 7 miles north and 5 miles west. How can an
> unlicensed station, presumably pumping out power by the
> milliwatt, have such coverage?
Even at such low power, even part-15, a good transmitter properly installed and a good antenna also properly installed will proudce rather good results. Part-15 am if done correctly can get out a few miles and still be legal. They could also have it set up using carrier current where they actually broadcast the signal through the buildings ac power wiring.
> local college station KASC 1260
(http://radio-locator.com/cgi-bi> n/finder?call=kasc&is_unl=Y&is_lic=Y&is_cp=Y&sr=Y&s=C&sid=),
> which is not CC but merely an unlicensed AM, has been heard
> as far as 7 miles north and 5 miles west. How can an
> unlicensed station, presumably pumping out power by the
> milliwatt, have such coverage?
Even at such low power, even part-15, a good transmitter properly installed and a good antenna also properly installed will proudce rather good results. Part-15 am if done correctly can get out a few miles and still be legal. They could also have it set up using carrier current where they actually broadcast the signal through the buildings ac power wiring.
> > I know CC AM stations only go a few hundred feet, but our
> > local college station KASC 1260
> (http://radio-locator.com/cgi-bi>
> n/finder?call=kasc&is_unl=Y&is_lic=Y&is_cp=Y&sr=Y&s=C&sid=),
>
> > which is not CC but merely an unlicensed AM, has been
> heard
> > as far as 7 miles north and 5 miles west. How can an
> > unlicensed station, presumably pumping out power by the
> > milliwatt, have such coverage?
>
> Even at such low power, even part-15, a good transmitter
> properly installed and a good antenna also properly
> installed will proudce rather good results. Part-15 am if
> done correctly can get out a few miles and still be legal.
> They could also have it set up using carrier current where
> they actually broadcast the signal through the buildings ac
> power wiring.
As abbreviated by CC, they aren't running carrier current, although I thought you couldn't get those signals outside of the building or within 200 feet.
I've read that Part 15 AM transmitters getting 3 miles is something of an "up to" factor. Thanks nevertheless.
> > local college station KASC 1260
> (http://radio-locator.com/cgi-bi>
> n/finder?call=kasc&is_unl=Y&is_lic=Y&is_cp=Y&sr=Y&s=C&sid=),
>
> > which is not CC but merely an unlicensed AM, has been
> heard
> > as far as 7 miles north and 5 miles west. How can an
> > unlicensed station, presumably pumping out power by the
> > milliwatt, have such coverage?
>
> Even at such low power, even part-15, a good transmitter
> properly installed and a good antenna also properly
> installed will proudce rather good results. Part-15 am if
> done correctly can get out a few miles and still be legal.
> They could also have it set up using carrier current where
> they actually broadcast the signal through the buildings ac
> power wiring.
As abbreviated by CC, they aren't running carrier current, although I thought you couldn't get those signals outside of the building or within 200 feet.
I've read that Part 15 AM transmitters getting 3 miles is something of an "up to" factor. Thanks nevertheless.
> > > I know CC AM stations only go a few hundred feet, but
> our
> > > local college station KASC 1260
> > (http://radio-locator.com/cgi-bi>
> >
> n/finder?call=kasc&is_unl=Y&is_lic=Y&is_cp=Y&sr=Y&s=C&sid=),
>
> >
> > > which is not CC but merely an unlicensed AM, has been
> > heard
> > > as far as 7 miles north and 5 miles west. How can an
> > > unlicensed station, presumably pumping out power by the
> > > milliwatt, have such coverage?
> >
> > Even at such low power, even part-15, a good transmitter
> > properly installed and a good antenna also properly
> > installed will proudce rather good results. Part-15 am if
>
> > done correctly can get out a few miles and still be legal.
>
> > They could also have it set up using carrier current where
>
> > they actually broadcast the signal through the buildings
> ac
> > power wiring.
>
> As abbreviated by CC, they aren't running carrier current,
> although I thought you couldn't get those signals outside of
> the building or within 200 feet.
>
> I've read that Part 15 AM transmitters getting 3 miles is
> something of an "up to" factor. Thanks nevertheless.
>
KJCB,
Also, I think the rules are just a *LITTLE* different for LPAMs operating on a college campus. I know they can use an 'intentional radiator' antenna instead of CC and still be legal. I should know this but can't seem to remember it all this morning.
I ran a CC station back in the early 90s and never did manage to get a useful signal out of it. My Part-15 did get out about 2-3 miles consistently until
one of Florida's T-storms zapped the station with lightning 3 times and knocked me off. I've gone to Internet radio for now, until I can financially afford to start it up again with new parts..<P ID="signature">______________
Proudly remembering the days of the hometown "country giant" radio stations now at
http://www.live365.com/stations/alanmccall</P>
> our
> > > local college station KASC 1260
> > (http://radio-locator.com/cgi-bi>
> >
> n/finder?call=kasc&is_unl=Y&is_lic=Y&is_cp=Y&sr=Y&s=C&sid=),
>
> >
> > > which is not CC but merely an unlicensed AM, has been
> > heard
> > > as far as 7 miles north and 5 miles west. How can an
> > > unlicensed station, presumably pumping out power by the
> > > milliwatt, have such coverage?
> >
> > Even at such low power, even part-15, a good transmitter
> > properly installed and a good antenna also properly
> > installed will proudce rather good results. Part-15 am if
>
> > done correctly can get out a few miles and still be legal.
>
> > They could also have it set up using carrier current where
>
> > they actually broadcast the signal through the buildings
> ac
> > power wiring.
>
> As abbreviated by CC, they aren't running carrier current,
> although I thought you couldn't get those signals outside of
> the building or within 200 feet.
>
> I've read that Part 15 AM transmitters getting 3 miles is
> something of an "up to" factor. Thanks nevertheless.
>
KJCB,
Also, I think the rules are just a *LITTLE* different for LPAMs operating on a college campus. I know they can use an 'intentional radiator' antenna instead of CC and still be legal. I should know this but can't seem to remember it all this morning.
I ran a CC station back in the early 90s and never did manage to get a useful signal out of it. My Part-15 did get out about 2-3 miles consistently until
one of Florida's T-storms zapped the station with lightning 3 times and knocked me off. I've gone to Internet radio for now, until I can financially afford to start it up again with new parts..<P ID="signature">______________
Proudly remembering the days of the hometown "country giant" radio stations now at
http://www.live365.com/stations/alanmccall</P>
W
westlife
Guest
> Also, I think the rules are just a *LITTLE* different for
> LPAMs operating on a college campus. I know they can use an
> 'intentional radiator' antenna instead of CC and still be
> legal.
That's called "Campus Free Radiate". Basically you can put up as strong of an AM signal as you like, just as long as the signal does not exceed Part 15 specs once you go outside of the campus property.
And you can really say the same thing about any kind of private property. Say you have a 500-acre ranch out in Wyoming somewhere... the FCC has no way of knowing (unless you are stupid enough to tell them!) if your transmitter's signal exceeds Part 15 specs WITHIN your own private property. The only thing that really matters is if it exceeds Part 15 specs OUTSIDE of your property's borders.
You can think of it as if you had an junky old unregistered pickup truck and you let your 13-year-old son drive it around that ranch... just as long as he stays off of public roads, that's perfectly legal, even though doing the same thing on a public road could get him in a LOT of trouble with the police!
<P ID="signature">______________
</P>
> LPAMs operating on a college campus. I know they can use an
> 'intentional radiator' antenna instead of CC and still be
> legal.
That's called "Campus Free Radiate". Basically you can put up as strong of an AM signal as you like, just as long as the signal does not exceed Part 15 specs once you go outside of the campus property.
And you can really say the same thing about any kind of private property. Say you have a 500-acre ranch out in Wyoming somewhere... the FCC has no way of knowing (unless you are stupid enough to tell them!) if your transmitter's signal exceeds Part 15 specs WITHIN your own private property. The only thing that really matters is if it exceeds Part 15 specs OUTSIDE of your property's borders.
You can think of it as if you had an junky old unregistered pickup truck and you let your 13-year-old son drive it around that ranch... just as long as he stays off of public roads, that's perfectly legal, even though doing the same thing on a public road could get him in a LOT of trouble with the police!
<P ID="signature">______________
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