Small AM broadcaster KIT

[atomic]

I know someone who built a small AM transmitter but it's pretty nice wattage (450 watts). He's been broadcasting onto county stations. It's pretty interesting to see how the stations react when they know they've been intercepted. The DJ sometimes will say "Okay, I got cut off there for a second..."

This is not a wattage that is allowed, i think most cities only permit 15 watts and under. I dunno. Someone post a reply because I'm lost with these prohibitting laws.

[TrineonX]

The city has absolutely Jack shit to do with the wattage limit on radio transmitters. I can tell YOU know Jack shit about radio because you said that 450 watts was a small radio, and that DJ's would say that they got cut off. A dj cannot tell if he is being broadcasted over. Thanks for enlightening us with your post.

[blankman]

So - atomic is a retard and doesnt know anything about "little am radio transmitters." If i was a psychologist i would blame his mom, if i were an electrician i would blame his dad. I'm neither of thoes things... but im still curious, how DO you make your own radio transmitter??

[SEN D-F]

Radio Transmitter Plans (http://www.google.com)

[atomic]

Yuck! A bunch of know it alls but fail to know anything. Im amused. And Disc Jockey's do know when they are cut off, a transmission line shows that their transmission to the tower has been cut off temperarily. I have family in the business working for Clear Channel, I know. You idiots. you do amuse me though.

-atomic

best wishes to all

[TrineonX]

Yuck! a noob who would like to know his shit. Hey atomic if you have family working for clear channel, it sure as hell isn't an engineer, he's probably one of those dumbshit DJ's who is paid to blab. Now tell me Atomic, how exactly does your friend "broadcast onto" radio transmissions before they get to the antenna, and then dissipate all that energy, and then insert his own signal into the coax, and then not get caught tresspassing on the antenna site.

No you don't know, You idiot. You amuse me.

TrineonX

best wishes to all but you Atomic

[TiedToTheTemple]

dont you think they have the transmission playing to people inside the building or something to tell when the station goes weak or cuts off.

obviously if someone elses voice comes on the station, the people making sure this doesn't happen will notify the dj and tech people and therefore will be able to tell?

Im probably wrong but it sounds so simple

[AxisMundi]

quote:Originally posted by TiedToTheTemple:



dont you think they have the transmission playing to people inside the building or something to tell when the station goes weak or cuts off.

obviously if someone elses voice comes on the station, the people making sure this doesn't happen will notify the dj and tech people and therefore will be able to tell?

Im probably wrong but it sounds so simple



You kinda got it right... see... dj's never do anything live... they always record it first... then play it anwhere from 15 seconds later to hours later. This is for censorship reasons and so they don't make themselves look like a stuttering fool if they slip up or have a brain fart... and you think a dj doesn't listen to the station while he's sitting in his booth? What the hell else are they gonna do for 6-8 hours... stair at the damn wall? the dj's here will answer IM's and emails... and they always know if something fucks up on the air... or if a cd starts skippin or whatever... so obviously SOMEONE is listening for them. But true, the dj's saying they were cut off is bs... first they wouldn't say it... second... they are only gonnabe cut off in part of their somewhat large broadcast area *nods*.

[bluntman457]

quote:Originally posted by TrineonX:

Yuck! a noob who would like to know his shit. Hey atomic if you have family working for clear channel, it sure as hell isn't an engineer, he's probably one of those dumbshit DJ's who is paid to blab. Now tell me Atomic, how exactly does your friend "broadcast onto" radio transmissions before they get to the antenna, and then dissipate all that energy, and then insert his own signal into the coax, and then not get caught tresspassing on the antenna site.

No you don't know, You idiot. You amuse me.

TrineonX

best wishes to all but you Atomic

well, apparently you know what your talking about. Enlighten us with your vast knowledge, wisdom(random snickering) and perhaps information on your educational background in the radio field. I would love to hear all the things you have to say about radios along with the pathetic attempts to make yourself appear learned.

[655321]

Perhaps your friend lied to impress you with radio jargon he half remembered from somewhere.

[655321]

Also i found this a while ago. http://www.scitoys.com/scitoys/scitoys/radio/am_transmitter.html for making simple am radio transmitters. I believe it only goes across the street, im not much of a radio person.

[bangbangbooty]

quote:Originally posted by atomic:

I know someone who built a small AM transmitter but it's pretty nice wattage (450 watts). He's been broadcasting onto county stations. It's pretty interesting to see how the stations react when they know they've been intercepted. The DJ sometimes will say "Okay, I got cut off there for a second..."

This is not a wattage that is allowed, i think most cities only permit 15 watts and under. I dunno. Someone post a reply because I'm lost with these prohibitting laws.

OK i don't believe any of your friends story.

Firstly small AM broadcast kits don't come as 450 Watts. If you do come across something of this power, you will need alot of electrrical background to construct it. Can you provide me with a link or URL to the kit?

Secondly AM stations generally operate in 2 ways.

<UL TYPE=SQUARE>

<LI>A remote antenna on a mountain with a microwave audio uplink.

<LI>Or a dedicated studio and antenna combination on the one premises.

</UL>

In the first case, to cut over the station you need a microwave transmitter, not an AM kit.

And the second case, you need to gain physical access to the Heliax line from the building to the antenna (normally on the roof). Then you have to cut the line (not easy with up to 50 Kilowatts running through it). Plus you need to carry a 12v car battery with the transmitter to the site.

Then you will need to attach a PL259 or N plug to the cable to connect your transmitter to.

And so on...

So please tell me how he accomplished this feat?

Or is the truth he made a 500 milliwatt kit with a range about as far as i can throw a pebble, and his old neighbour yelled at him for making his pocket wireless crackle?

Edit: And the legally permitted power level for civilans in the commercial AM band is Zero watts, aka none.

Unless your country has LIPD (Low Interference Potential Devices) regulations for this band. Then it would probably be 1 Watt and under.



[This message has been edited by bangbangbooty (edited 08-04-2003).]

[~Hyper~]

Even if a DJ was broadcasting live and listening to it, they wouldn't know if the signal got intercepted. They're broadcasting from about 100 feet in front of them, think your signal from a mile away is going to override it? http://www.totse.com/bbs/tongue.gif (http://www.totse.com/bbs/tongue.gif)