Unlicensed operation is generally prohibited, with the exception of some extremely low powered "Part 15" devices which will cover a radius of no more than a maximum radius of a couple of hundred feet. Even unlicensed operation with such low power as 100 milliwatts (0.1 watt) is prohibited. DON'T BUY equipment that claims to allow you to set up your own broadcast station. Penalties for unlicensed operation can be severe (see sample cases).
No.
Whoever penned that phony warning was inaccurate and took fallacious editorial license.
HE is prohibited and may face grievous consequences.
There is nothing in the rules that says you can't operate a part 15 Radio Station. Though some have tried to sweat this is the case. What you are not suppose to do is go over the field strength of 15:239 for FM and for AM its a choice of 15:219 which allows 100 mW into a 3 meter antenna. For FM its 250 uV/m at a distance of 3 meters. There are those who would like us to fear of running a part 15 Radio Station. Now we do have the over powered FM stations sold online. But by now we have been dealing with a possible change in rules. When my friend gets done with that 6 foot AM antenna for the Talking House, iAM, Talking Sign there will be some haters because suddenly you'll be able to go 4.6 miles legally on AM.
At that link that stated what the OP said. However, just for fun I spot checked a bunch of the "violators" and every one that I looked at (that was about the violation, not just a formatlity of fines issued) was an FM over the field strength limit.
And the ONLY one in Minnesota on the whole page was an electric coop that forgot to renew their two-way license.
TIB
... When my friend gets done with that 6 foot AM antenna for the Talking House, iAM, Talking Sign there will be some haters because suddenly you'll be able to go 4.6 miles legally on AM. ...
Certainly it will be revolutionary when/if a MW monopole antenna system with a 6-foot radiating length including all of its conductors is proven to produce a useful coverage radius greater than such an antenna system using a 9.84-foot radiating length (other things equal).
as 15.239 and 15.219 is concerned.
Nor is there on longwave from 160 kHz to
190 kHz.
Ask the many experimenters that are running
in the longwave and mediumwave allocations
with digital modes or morse code (unmodulated
carrier on and off.)
A friend of mine ran longwave and mediumwave
beacons in the 1980s with cw. Now, granted, he
used the ground systems of a broadcast station.
OK, so usually Part 15 experimenters would not
have access to such a thing.
Still, the results are impressive. A 100mW
Part 15 beacon on 1625 kHz was heard in Connecticut (of course) and also
MA, NY, and NH.
His 1 watt longwave beacon on 189.0 kHz was heard in
5 states, the farthest away was North Carolina. That's
at least several hundred miles, probably more - I'd have
to get out the map. There was enough antenna current
on the longwave beacon to light 9 neon bulbs in series.
(Does this make sense? Current?)
Granted again, there was a BC ground system and
both beacons had big tophats. The antenna length
for the longwave was 50 feet. The length for the
MW beacon was 10 feet. (This was before the slight
rule change regarding length.)
Anyhow - there are still quite a few of these experimenters
on today using digital modes.
And they are going hundreds, and sometimes, as much
as 1000 miles.
Once the antenna length and input power are determined,
you can't just STOP the radio wave. It may be very very
weak - but it will keep going.
Brooce, WLP and whatever else I have running around
here
My AM and FM signals are straining at their "operational limits."
I'm not a big fan of AM so when I heard this I had to take a double take. I can't reveal too much about this antenna only to say we discussed how if you make an antenna thicker it could be shorter. Also material can make the difference. But this was running like a part 15 Radio station playing music. So if this continues to work the way it does and the antenna/atu system is perfected it will change lots of things for apartment dwellers and who can only use AM in their area. It will probably raise a few eyebrows as never before have I seen a 100 mW AM transmitter travel anywhere near 4.6 miles and be receivable. If this takes place at my house when its done it will change a lot. I can't wait to see what else can be done.
I became aware at some point that denser and thicker materials have a deeper resonance than light-weight or conventional materials, and thus should be capable of providing more antenna at less length.
They site the laws of physics and that sort of thing to try and debunk me, but I know what I believe.
The one thing you didn't mention is the length of the feed line. That also has to be taken into consideration and not just radiator plus ground.
... It will probably raise a few eyebrows as never before have I seen a 100 mW AM transmitter travel anywhere near 4.6 miles and be receivable. ...
It will be highly unlikely that anyone will "see" a LEGAL, unlicensed transmit system operating in the AM broadcast band that consistently produces useful signals to typical, indoor, consumer-level AM broadcast receivers beyond a radius of 1/2-mile or so.
Those darned laws of physics. They get you every time.
Mr Blare posted: ... They site [sic] the laws of physics and that sort of thing to try and debunk me, but I know what I believe. ...
Kindly note that although everyone may believe as they wish, all such unproven beliefs do not negate physical law.
What if they discover warps in the law of physics caused by unexplained forces.