Hi there guys, i have been using my CB radio for a few monthe now (my friend has got me in to it) but recently we are about to go on a UK holiday witha grouo of us, and due to one of our friende always waking up late and delaying our itenery (time to get a littoe pay back haha). i heard that potentially we could prank him by speaking over his speakers using my CB radio, but i read that i may need a certain powered linear amp and antenna to match. I currently have a PNI Escort HP 6500 CB, i was goint to buy a KL-203 amp and a PNI ML70 Antenna (these would be useful for my setup anyway) but woule thst be enough to carry through to the next room?
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Potential interference with speakers?
- Thread starter Snitch321
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slowmover
Active Member
You’d want to conduct a test on your own, previous to the prank.
AB5ID
Member
Murphy says, It's likely that it won't cause interference when you want it to, but it will cause interference when you don't want it to. 
mmckenna
I ♥ Ø
It depends on a couple of things….
The quality of the speakers - if they are well shielded, it's not going to work.
The speaker cable - How long is it, will it act like an antenna at 27MHz? Is it shielded?
Whatever the speakers are connected to - will it cause the received audio to make it through the system to the amp and the speakers?
Will the receiver/amplifier, whatever be turned on? Simply getting enough RF into the speakers/speaker wiring may not be enough to make this work. Sometimes it requires the device getting interfered with to rectify the AM signal and boost that audio enough.
How close can you get to this setup? - Same room? Next door?
How much power can you run, legal issues aside? - Will it be enough to cause the desired effect?
What kind of antenna can you get close enough to cause this?
Are you going to be running enough power to come over his speakers? What other equipment will that RF get into? Fire alarm system? Other systems in the building?
Is it possible? Maybe. Yes, if you have enough money, time and work into it, and if they have cheap enough components, and if the stereo is on. If you don't have control over all that, no one here can tell you it's going to work.
A lot of variables you may or may not have control over.
Seems like a lot of work, money, and variables to play a joke on someone. There's easier ways to get them out of bed if they sleep in….
wtp
Member
Back in my day, 1000 watt amp would take out tv 3 blocks away. Friends mother used to call mine saying she could not watch her soap operas.
AB5ID
Member
wtp
Member
back in my teen years my two younger brothers did not want to get up for school and after mom tied to wake them, it was my turn.
i put a metal garbage can in the middle of their room and then lit and dropped in some firecrackers.
mom yelled"WHAT WAS THAT" ?
i just said they are up now, this never happened again.
i put a metal garbage can in the middle of their room and then lit and dropped in some firecrackers.
mom yelled"WHAT WAS THAT" ?
i just said they are up now, this never happened again.
mmckenna
I ♥ Ø
Sitting outside my apartment building talking on the CB one night when a neighbor came out in his boxers looking around and saw me. Came over and asked if I was talking on a radio. Seems I was coming out of his switched off stereo in the living room and his wife woke up and thought there were burglars.
AM with some power behind it will do some crazy things.
AM with some power behind it will do some crazy things.
Oh wow, how powerful wae your amp for that to happen?
I don't recall but it wasn't much. And I think I switched it off and kept talking and he came back out. So even on stock power.
Our neighbor use to do that back in the 70's on his base station starting 6 to 7 to about midnight or later no one could watch tv or talk on the phone.
He used so much power he would interfere with everything. He would brag about how all the neighbors hated him on the radio, we could all hear him. When he would get drunk and go off the bed we had an antenna party and cut his antennas (co-phased I think is what it was called) off his truck. He of course blew a gasket and threaten to shoot us if he ever caught us. The police wouldn't do anything other than take a report. It was always easy for us to avoid him as he would talk about his plans on the radio.
He always parked outside because the antennas on the truck wouldn't fit in the garage. I think between all the neighbors we cut six sets of antennas off his truck before he stopped.
What I'm saying is don't prank him with your CB radio. Find some other way to prank him.
The air horn outside his bedroom window is a good one.
He used so much power he would interfere with everything. He would brag about how all the neighbors hated him on the radio, we could all hear him. When he would get drunk and go off the bed we had an antenna party and cut his antennas (co-phased I think is what it was called) off his truck. He of course blew a gasket and threaten to shoot us if he ever caught us. The police wouldn't do anything other than take a report. It was always easy for us to avoid him as he would talk about his plans on the radio.
He always parked outside because the antennas on the truck wouldn't fit in the garage. I think between all the neighbors we cut six sets of antennas off his truck before he stopped.
What I'm saying is don't prank him with your CB radio. Find some other way to prank him.
The air horn outside his bedroom window is a good one.
wtp
Member
i did not say outside....
look for my second post.
look for my second post.
I have read about CB's causing interference with neighbouring speakers, and i am using a 500W linear amp, so i am just concerned would this interfere with any surrounding speakers? Is there something specifically they that people do or forget to do to cause a splatter on close proximity speaker systems, so i know to avoid.
mmckenna
I ♥ Ø
Seriously?
Yeah, don't run high power amplifiers. This isn't an anti CB thing, it's not anti amplifier. It's just truth.
Most cheap electronics are not well shielded and strong nearby transmitters will cause issues.
AM/SSB is a bit more of an issue since it can easily be rectified and cause sounds to come out of electronics.
The solution is to lower your transmit power to just what you need, and keep your antenna away from others.
Splattering from poorly tuned radios is your other challenge. Don't get your radio peak/tuned by bubba down at the truck stop. Keep it stock and let the amplifier do it's job. If you -must- peak and tune, get it done by someone who knows what they are doing and has the right test equipment. Since the guys that do this stuff aren't following any rules/standards, it's up to you to find a reputable person.
Consider running a low pass filter to keep your signal out of the higher bands, also.
One thing i did do was setup my speaker system, right next to my cb setup, and i could not hear any interference...so i am guessing this would be the same for other speaker systems near by. So you are saying that systems that have not been tuned, will ultimately cause the interference?
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