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And the reason "It ain't gonna happen" is that there are probably
hundreds of people doing the same thing on the same frequency so all you end up hearing is noise. I have communicated to Great Britain using CW and 300 milliwatts on 28 MHz, so don't tell me it ain't gonna happen. By the same token, I can't talk to a buddy 100 miles away on 100 Watts on 28 MHz since he is in the "skip zone" at 28 MHz. Scott N0EDV donut wrote: (Limitedselection) wrote in : I wouldn't be worried about thelegal issues if skywave was not an issue. But unfortunately it looks like with skywave any signal no matter how small can be heard world-wide. This is ridiculous. Try talking skip even on a car CB putting out legal power. It ain't gonna happen. Beside, the solar cycle is on it's downward spiral, and skip openings on 29 MHz are going to become few and far between and the cycle deepens. If your local CBer is primarily a "skip" talker, that in itself might take him out. -- Scott http://corbenflyer.tripod.com http://groups.yahoo.com/group/ParasolAirplanes Building RV-4 Gotta Fly or Gonna Die! |
On 6 Sep 2003 07:11:23 GMT, donut wrote:
This is ridiculous. Try talking skip even on a car CB putting out legal power. It ain't gonna happen. Yes, but it's a fact that these signals can and do end up thousands of miles away where they cause enough general noise to interfere with sensitive communications equipment. Just because you can't "talk skip" effectively on low power doesn't mean your signals aren't screwing things up for others around the world. -- "I believe history will be kind to me, since I intend to write it." - Winston Churchill |
On 6 Sep 2003 07:11:23 GMT, donut wrote:
This is ridiculous. Try talking skip even on a car CB putting out legal power. It ain't gonna happen. Yes, but it's a fact that these signals can and do end up thousands of miles away where they cause enough general noise to interfere with sensitive communications equipment. Just because you can't "talk skip" effectively on low power doesn't mean your signals aren't screwing things up for others around the world. -- "I believe history will be kind to me, since I intend to write it." - Winston Churchill |
On Sat, 06 Sep 2003 00:34:59 -1000, Rick Frazier
wrote: [snip] Several days later, upon discovering a party at the house next door, the same unnamed person invited himself in and had a conversation with the renter of the house. It seems that for the first time in months, he had been able to actually hear his stereo without trash talk emanating from it at odd hours, and was celebrating, treating (most of) the block to a good size keg of beer. It seems the CB neighbor had some sort of malfunction of a high power linear amp, and was threatening to sue the place that sold him the amp because it had failed quite spectacularly.... :-) A heartwarming story. Thanks for sharing. -- "I believe history will be kind to me, since I intend to write it." - Winston Churchill |
On Sat, 06 Sep 2003 00:34:59 -1000, Rick Frazier
wrote: [snip] Several days later, upon discovering a party at the house next door, the same unnamed person invited himself in and had a conversation with the renter of the house. It seems that for the first time in months, he had been able to actually hear his stereo without trash talk emanating from it at odd hours, and was celebrating, treating (most of) the block to a good size keg of beer. It seems the CB neighbor had some sort of malfunction of a high power linear amp, and was threatening to sue the place that sold him the amp because it had failed quite spectacularly.... :-) A heartwarming story. Thanks for sharing. -- "I believe history will be kind to me, since I intend to write it." - Winston Churchill |
Try talking skip even on a car CB putting out legal
power. It ain't gonna happen. I'd have to totally disagree with that. It can and does happen all the time. The low sunspot cycle means it doesn't happen as often but there are still band openings and skip even at the bottom of the cycle. |
Try talking skip even on a car CB putting out legal
power. It ain't gonna happen. I'd have to totally disagree with that. It can and does happen all the time. The low sunspot cycle means it doesn't happen as often but there are still band openings and skip even at the bottom of the cycle. |
A lot of amatuer radio operators and RF engineers are telling me
that such a device could wreak havoc world-wide It won't "wreak havoc" world-wide, but it is very likely that it will be heard on occasions long distances from your location - and it is illegal. Even if your signal is only heard by your neighbor, intestinally jamming him is not legal - even if what he is doing is also not legal. On the technical side, it is just not possible to generate a signal that will be strong enough to block his on your property while ensuring that your signal will not leave your property. It is not technically possible to control signal strengths (especially given that your talkies will be moving around the property) to the point that it will block the reception of his signal while letting your signals through without interference when using the same frequency. |
A lot of amatuer radio operators and RF engineers are telling me
that such a device could wreak havoc world-wide It won't "wreak havoc" world-wide, but it is very likely that it will be heard on occasions long distances from your location - and it is illegal. Even if your signal is only heard by your neighbor, intestinally jamming him is not legal - even if what he is doing is also not legal. On the technical side, it is just not possible to generate a signal that will be strong enough to block his on your property while ensuring that your signal will not leave your property. It is not technically possible to control signal strengths (especially given that your talkies will be moving around the property) to the point that it will block the reception of his signal while letting your signals through without interference when using the same frequency. |
"donut" wrote in message --SNIP-- 1. Change the channel the walkie talkies operate on, or 2. Replace them with walkie talkies using another band. I believe there are walkies talkies that also operate around 49 MHz. FWIW, the cost of FRS radios has come down to the level of kid's walkie talkies. I recently bought a pair of Uniden FRS radios at WalMart for about $17 / pair. 27 MHz walkie talkies are still around $10 a pair. I gave 'em to my kids so they can keep in touch around the neighborhood..... RaOuL |
"donut" wrote in message --SNIP-- 1. Change the channel the walkie talkies operate on, or 2. Replace them with walkie talkies using another band. I believe there are walkies talkies that also operate around 49 MHz. FWIW, the cost of FRS radios has come down to the level of kid's walkie talkies. I recently bought a pair of Uniden FRS radios at WalMart for about $17 / pair. 27 MHz walkie talkies are still around $10 a pair. I gave 'em to my kids so they can keep in touch around the neighborhood..... RaOuL |
"donut" wrote in message ... (Limitedselection) wrote in : I hardly think this would be a problem. For one, you'd need an antenna radiating a large proportion of skywave. Second, the CB bands are loaded with all kinds of open carriers, whistlers, music players, etc. so your tiny part in this would be unlikely to harm anyone. You cannot control whether an antenna radiates a skywave or a groundwave. Even with controlling the takeoff angle, you will still get some radiation in other directions which means you will get some skywave propagation anyway. Due to its frequency, groundwave on CB is not a useful propagation mode. 27mhz is high enough in frequency that it does not want to follow the curvature of the earth. It propagates mainly by "line of sight" (i.e. straight line) and/or skywave (i.e. skip). Dee D. Flint, N8UZE |
"donut" wrote in message ... (Limitedselection) wrote in : I hardly think this would be a problem. For one, you'd need an antenna radiating a large proportion of skywave. Second, the CB bands are loaded with all kinds of open carriers, whistlers, music players, etc. so your tiny part in this would be unlikely to harm anyone. You cannot control whether an antenna radiates a skywave or a groundwave. Even with controlling the takeoff angle, you will still get some radiation in other directions which means you will get some skywave propagation anyway. Due to its frequency, groundwave on CB is not a useful propagation mode. 27mhz is high enough in frequency that it does not want to follow the curvature of the earth. It propagates mainly by "line of sight" (i.e. straight line) and/or skywave (i.e. skip). Dee D. Flint, N8UZE |
"donut" wrote in message ... (Limitedselection) wrote in : I wouldn't be worried about thelegal issues if skywave was not an issue. But unfortunately it looks like with skywave any signal no matter how small can be heard world-wide. This is ridiculous. Try talking skip even on a car CB putting out legal power. It ain't gonna happen. Happens all the time when the sunspot cycle is favorable. Beside, the solar cycle is on it's downward spiral, and skip openings on 29 MHz are going to become few and far between and the cycle deepens. If your local CBer is primarily a "skip" talker, that in itself might take him out. Unfortunately the CB operator will probably think the solution is more power. When he gets an occasional E skip propagation, he'll think he was correct. His use of excessive power will then aggravate the situation. Dee D. Flint, N8UZE |
"donut" wrote in message ... (Limitedselection) wrote in : I wouldn't be worried about thelegal issues if skywave was not an issue. But unfortunately it looks like with skywave any signal no matter how small can be heard world-wide. This is ridiculous. Try talking skip even on a car CB putting out legal power. It ain't gonna happen. Happens all the time when the sunspot cycle is favorable. Beside, the solar cycle is on it's downward spiral, and skip openings on 29 MHz are going to become few and far between and the cycle deepens. If your local CBer is primarily a "skip" talker, that in itself might take him out. Unfortunately the CB operator will probably think the solution is more power. When he gets an occasional E skip propagation, he'll think he was correct. His use of excessive power will then aggravate the situation. Dee D. Flint, N8UZE |
Now, he actually has fun frustrating the offending CB'er.
That's great. So now your friend has become a part of the problem instead of part of the solution. That makes him no better than the guy he's compaining about. |
Now, he actually has fun frustrating the offending CB'er.
That's great. So now your friend has become a part of the problem instead of part of the solution. That makes him no better than the guy he's compaining about. |
Why not get a pair of Motorola frs radio set (pair) at local store,
I just picked up a pair for $ 25 and a mail in rebate for $ 15 so low cost, plus these are on uhf frequencies, no cb frequencies and low power. Less expensive then trying to block the nasty guy on the cb. jimboz Limitedselection wrote: Roy, Thanks - Mike posted about sky waves (I was unaware of), so even a very low power device centrally located in my property would apparently be heard world-wide - which is NOT what I want. Actually, I did want to jam the reception of the existing CB signals on my property (at least in and around the house). One of my neighbors uses rather 'salty' language and the local kids use some walkie talkies around the house - I fugured that jamming the outside signals would still allow the kids to talk due to their close proximity. Thanks again. From: Roy Lewallen There's no way to make a signal stop at your property line, short of putting a perfect shield around your property. And if you did that, you wouldn't be bothered by your neighbor's CB anyway. |
Why not get a pair of Motorola frs radio set (pair) at local store,
I just picked up a pair for $ 25 and a mail in rebate for $ 15 so low cost, plus these are on uhf frequencies, no cb frequencies and low power. Less expensive then trying to block the nasty guy on the cb. jimboz Limitedselection wrote: Roy, Thanks - Mike posted about sky waves (I was unaware of), so even a very low power device centrally located in my property would apparently be heard world-wide - which is NOT what I want. Actually, I did want to jam the reception of the existing CB signals on my property (at least in and around the house). One of my neighbors uses rather 'salty' language and the local kids use some walkie talkies around the house - I fugured that jamming the outside signals would still allow the kids to talk due to their close proximity. Thanks again. From: Roy Lewallen There's no way to make a signal stop at your property line, short of putting a perfect shield around your property. And if you did that, you wouldn't be bothered by your neighbor's CB anyway. |
Recently the FCC has been writing to the CEOs of electric utilities about
intereference experienced by individual amateurs and I believe last week I saw a letter to some people about a baby monitor. The letters are at http://www.arrl.org/news/enforcement_logs/ FWIW, Tom, N3IJ "Bob McConnell" wrote in message ... On Sun, 7 Sep 2003 03:47:34 +0000 (UTC), "-=jd=-" wrote: Dateline "rec.radio.amateur.homebrew", Sat, 06 Sep 2003 18:55:22 GMT: As it appeared in message-ID# , "Bob Lewis \(AA4PB\)" appears to have written the following... Now, he actually has fun frustrating the offending CB'er. That's great. So now your friend has become a part of the problem instead of part of the solution. That makes him no better than the guy he's compaining about. Actually, quite the opposite. None of the neighbors could get any response from the FCC. The offending CB'er was coming over the TV's and radios in the neighborhood. Commercial TV and radio receivers are notoriously susceptible to strong signals well outside of their frequency range. The manufacturers have taken too many shortcuts to provide decent selectivity. So the FCC doesn't pay much attention to those complaints. But as soon as the hams in the area had a problem, they should have been notifying the FCC. At that point, your neighbor was interfering with a licensed service and they do pay attention to that. Admitedly, their attention has been sporadic in the past, but in the last few years they have gotten much more serious about tracking down operators that are causing harmful interference, even if they are licensed. If the event you described happened recently, there may have been a better way. Keep that in mind if he gets back on the air. Bob McConnell N2SPP |
Recently the FCC has been writing to the CEOs of electric utilities about
intereference experienced by individual amateurs and I believe last week I saw a letter to some people about a baby monitor. The letters are at http://www.arrl.org/news/enforcement_logs/ FWIW, Tom, N3IJ "Bob McConnell" wrote in message ... On Sun, 7 Sep 2003 03:47:34 +0000 (UTC), "-=jd=-" wrote: Dateline "rec.radio.amateur.homebrew", Sat, 06 Sep 2003 18:55:22 GMT: As it appeared in message-ID# , "Bob Lewis \(AA4PB\)" appears to have written the following... Now, he actually has fun frustrating the offending CB'er. That's great. So now your friend has become a part of the problem instead of part of the solution. That makes him no better than the guy he's compaining about. Actually, quite the opposite. None of the neighbors could get any response from the FCC. The offending CB'er was coming over the TV's and radios in the neighborhood. Commercial TV and radio receivers are notoriously susceptible to strong signals well outside of their frequency range. The manufacturers have taken too many shortcuts to provide decent selectivity. So the FCC doesn't pay much attention to those complaints. But as soon as the hams in the area had a problem, they should have been notifying the FCC. At that point, your neighbor was interfering with a licensed service and they do pay attention to that. Admitedly, their attention has been sporadic in the past, but in the last few years they have gotten much more serious about tracking down operators that are causing harmful interference, even if they are licensed. If the event you described happened recently, there may have been a better way. Keep that in mind if he gets back on the air. Bob McConnell N2SPP |
In article ,
Limitedselection wrote: To "Caveat Lector": Thanks for your 'help'! Apparently you are a lawyer (or play one on usenet)? You don't need to be a lawyer to know the law, nor a weatherman to know which way the wind blows. You will be interfering with an authorized radio service. That's illegal. You will be transmitting (outside Part 15 limits) without a license. That's illegal. You will be putting on the air transmitting equipment that is neither inspected-and-accepted nor type-accepted. That's illegal. You do not own nor control the airwaves on your property. I could try to list the things that are illegal even though you own the property they're done on, except that I have a 10-Meg limit on my temporary file size. I agree you probably won't get caught, but don't kid yourself about what you're doing... -- R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W Icom R75 Heathkit GR-81 Inverted-L in the attic Reply to wieland at me dot udel dot edu |
In article ,
Limitedselection wrote: To "Caveat Lector": Thanks for your 'help'! Apparently you are a lawyer (or play one on usenet)? You don't need to be a lawyer to know the law, nor a weatherman to know which way the wind blows. You will be interfering with an authorized radio service. That's illegal. You will be transmitting (outside Part 15 limits) without a license. That's illegal. You will be putting on the air transmitting equipment that is neither inspected-and-accepted nor type-accepted. That's illegal. You do not own nor control the airwaves on your property. I could try to list the things that are illegal even though you own the property they're done on, except that I have a 10-Meg limit on my temporary file size. I agree you probably won't get caught, but don't kid yourself about what you're doing... -- R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W Icom R75 Heathkit GR-81 Inverted-L in the attic Reply to wieland at me dot udel dot edu |
This one is tried and proven to be a winner. Start with some kind of mild
spark generator (large buzzer or mechanical bell). Isolate the device from it's power source with a pair of chokes (and place in soundproof box). Feed from the device(one lead to each side of spark gap or points) VIA 450Ohm open ladder line to a dipole cut to the 11 Meter band and orient it in the direction of the CB'ers antenna. This setup TRASHES AM and SSB RCVRS!!! I'ts possible your neighbors might see some sparklies in their picture on the low VHF channels. Want to make it REAL efficiant? take the CB radio you have and put a COR on it's RCVR. Set it up without an antenna to his favorite channel.When the COR closes it starts a time relay and transmits for about 10 minutes. Each time it hears the jerk it pops up and jams his RCVR. This scheme will NOT work over 500 feet. If this guy lives next door or behind you he IS game. He can not talk with someone ifhe can HEAR them to begin with. Even the dumbest of animals will soon learn....Eddie "Limitedselection" wrote in message ... Help! I want to effectively "jam" CB reception on my property. The "jammer" would need to be low power and cover an area about as large as a 'small' city block. I have searched google, but I have only found references to schematics that were either posted to usenet as a picture (thus not saved in google archives), or located on web servers in domains that no longer exist. Any information would be appreciated! |
This one is tried and proven to be a winner. Start with some kind of mild
spark generator (large buzzer or mechanical bell). Isolate the device from it's power source with a pair of chokes (and place in soundproof box). Feed from the device(one lead to each side of spark gap or points) VIA 450Ohm open ladder line to a dipole cut to the 11 Meter band and orient it in the direction of the CB'ers antenna. This setup TRASHES AM and SSB RCVRS!!! I'ts possible your neighbors might see some sparklies in their picture on the low VHF channels. Want to make it REAL efficiant? take the CB radio you have and put a COR on it's RCVR. Set it up without an antenna to his favorite channel.When the COR closes it starts a time relay and transmits for about 10 minutes. Each time it hears the jerk it pops up and jams his RCVR. This scheme will NOT work over 500 feet. If this guy lives next door or behind you he IS game. He can not talk with someone ifhe can HEAR them to begin with. Even the dumbest of animals will soon learn....Eddie "Limitedselection" wrote in message ... Help! I want to effectively "jam" CB reception on my property. The "jammer" would need to be low power and cover an area about as large as a 'small' city block. I have searched google, but I have only found references to schematics that were either posted to usenet as a picture (thus not saved in google archives), or located on web servers in domains that no longer exist. Any information would be appreciated! |
Subject: want circuit/schematic for CB "jammer"
From: (Robert F Wieland) Date: 9/13/2003 12:57 PM Pacific Daylight Time Message-id: In article , Limitedselection wrote: To "Caveat Lector": Thanks for your 'help'! Apparently you are a lawyer (or play one on usenet)? You don't need to be a lawyer to know the law, nor a weatherman to know which way the wind blows. You will be interfering with an authorized radio service. That's illegal. You will be transmitting (outside Part 15 limits) without a license. That's illegal. You will be putting on the air transmitting equipment that is neither inspected-and-accepted nor type-accepted. That's illegal. You do not own nor control the airwaves on your property. I could try to list the things that are illegal even though you own the property they're done on, except that I have a 10-Meg limit on my temporary file size. I agree you probably won't get caught, but don't kid yourself about what you're doing... -- R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W Icom R75 Heathkit GR-81 Inverted-L in the attic Reply to wieland at me dot udel dot edu Wieland, I am not kidding myself. I never stated, asserted, proposed or implied that jamming was legal. I am very sorry that you completely misinterpreted my post. I know that it jamming is illegal, okay Wieland? Thanks for your help! |
Subject: want circuit/schematic for CB "jammer"
From: (Robert F Wieland) Date: 9/13/2003 12:57 PM Pacific Daylight Time Message-id: In article , Limitedselection wrote: To "Caveat Lector": Thanks for your 'help'! Apparently you are a lawyer (or play one on usenet)? You don't need to be a lawyer to know the law, nor a weatherman to know which way the wind blows. You will be interfering with an authorized radio service. That's illegal. You will be transmitting (outside Part 15 limits) without a license. That's illegal. You will be putting on the air transmitting equipment that is neither inspected-and-accepted nor type-accepted. That's illegal. You do not own nor control the airwaves on your property. I could try to list the things that are illegal even though you own the property they're done on, except that I have a 10-Meg limit on my temporary file size. I agree you probably won't get caught, but don't kid yourself about what you're doing... -- R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W Icom R75 Heathkit GR-81 Inverted-L in the attic Reply to wieland at me dot udel dot edu Wieland, I am not kidding myself. I never stated, asserted, proposed or implied that jamming was legal. I am very sorry that you completely misinterpreted my post. I know that it jamming is illegal, okay Wieland? Thanks for your help! |
On 14 Sep 2003 07:39:17 GMT,
(Limitedselection) wrote: Subject: want circuit/schematic for CB "jammer" From: (Robert F Wieland) Date: 9/13/2003 12:57 PM Pacific Daylight Time Message-id: In article , Limitedselection wrote: To "Caveat Lector": Thanks for your 'help'! Apparently you are a lawyer (or play one on usenet)? You don't need to be a lawyer to know the law, nor a weatherman to know which way the wind blows. You will be interfering with an authorized radio service. That's illegal. You will be transmitting (outside Part 15 limits) without a license. That's illegal. You will be putting on the air transmitting equipment that is neither inspected-and-accepted nor type-accepted. That's illegal. You do not own nor control the airwaves on your property. I could try to list the things that are illegal even though you own the property they're done on, except that I have a 10-Meg limit on my temporary file size. I agree you probably won't get caught, but don't kid yourself about what you're doing... -- R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W Icom R75 Heathkit GR-81 Inverted-L in the attic Reply to wieland at me dot udel dot edu Wieland, I am not kidding myself. I never stated, asserted, proposed or implied that jamming was legal. I am very sorry that you completely misinterpreted my post. I know that it jamming is illegal, okay Wieland? Thanks for your help! a friend made a jammer for a difficult person who caused a lot of problems for the surrounding world. The jammer had photodiode, and would only operate when dark, it transmitted only after a CB transmission - for the next 20 minutes causing reception impossible for this guy, and it was hidden in a nearby trea So this bloke couldn't make 2-way communication and after some time resigned to find a new house somewhere far away from this place He had caused very much problems running high power and blocking TV-and broadcast-reception, so it was a good idea to keep him from activitating the CB or what ever band It happened many years ago, but still it is told to amuse the friends -jm -- remove ,xnd to reply (Spam precaution!) |
On 14 Sep 2003 07:39:17 GMT,
(Limitedselection) wrote: Subject: want circuit/schematic for CB "jammer" From: (Robert F Wieland) Date: 9/13/2003 12:57 PM Pacific Daylight Time Message-id: In article , Limitedselection wrote: To "Caveat Lector": Thanks for your 'help'! Apparently you are a lawyer (or play one on usenet)? You don't need to be a lawyer to know the law, nor a weatherman to know which way the wind blows. You will be interfering with an authorized radio service. That's illegal. You will be transmitting (outside Part 15 limits) without a license. That's illegal. You will be putting on the air transmitting equipment that is neither inspected-and-accepted nor type-accepted. That's illegal. You do not own nor control the airwaves on your property. I could try to list the things that are illegal even though you own the property they're done on, except that I have a 10-Meg limit on my temporary file size. I agree you probably won't get caught, but don't kid yourself about what you're doing... -- R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W Icom R75 Heathkit GR-81 Inverted-L in the attic Reply to wieland at me dot udel dot edu Wieland, I am not kidding myself. I never stated, asserted, proposed or implied that jamming was legal. I am very sorry that you completely misinterpreted my post. I know that it jamming is illegal, okay Wieland? Thanks for your help! a friend made a jammer for a difficult person who caused a lot of problems for the surrounding world. The jammer had photodiode, and would only operate when dark, it transmitted only after a CB transmission - for the next 20 minutes causing reception impossible for this guy, and it was hidden in a nearby trea So this bloke couldn't make 2-way communication and after some time resigned to find a new house somewhere far away from this place He had caused very much problems running high power and blocking TV-and broadcast-reception, so it was a good idea to keep him from activitating the CB or what ever band It happened many years ago, but still it is told to amuse the friends -jm -- remove ,xnd to reply (Spam precaution!) |
Here is an interesting idea. A guy could use a 555 timer chip to make a
circuit that would literally key up in the guys face every time he keyed his rig, by connecting the trigger input on the timer chip to the signal from the s-meter , which is filtered dc. the amount of time it would key up for could be set by the timing interval of the chip . Now, we simply turn the sensitivity of the receiver down, and turn the power output down also on transmit. this means a 12- volt car battery could run this setup for a loooong time. The receive sensitivity is turned down until only strong local signals produce enough s-meter output to trigger the chip into keying the rig up. This ensures that it only keys on him, since you will place this somewhere near his residence. A friend of mine did this with great success, since he took a regular breaker box, and mounted it on a light pole near the guy's house, along with a bunch of other boxes that were on the pole already, and ran a 9-foot wire up the pole. It was quite a while before the power company discovered the 'superfluous" box on the back of the light pole, long after it had served its purpose well. the 12- volt car battery that ran it lasted over a month with this setup............. total cost ? it might have cost two or three dollars to make the circuit on a piece of perfboard... "Caveat Lector" wrote in message news:iF36b.28605$S_.20371@fed1read01... Golly -- FYI: Jamming is illegal -- subject to an FCC fine -- 73 From The Signal In The Noise Caveat Lector Ya All "Limitedselection" wrote in message ... Help! I want to effectively "jam" CB reception on my property. The "jammer" would need to be low power and cover an area about as large as a 'small' city block. I have searched google, but I have only found references to schematics that were either posted to usenet as a picture (thus not saved in google archives), or located on web servers in domains that no longer exist. Any information would be appreciated! |
Here is an interesting idea. A guy could use a 555 timer chip to make a
circuit that would literally key up in the guys face every time he keyed his rig, by connecting the trigger input on the timer chip to the signal from the s-meter , which is filtered dc. the amount of time it would key up for could be set by the timing interval of the chip . Now, we simply turn the sensitivity of the receiver down, and turn the power output down also on transmit. this means a 12- volt car battery could run this setup for a loooong time. The receive sensitivity is turned down until only strong local signals produce enough s-meter output to trigger the chip into keying the rig up. This ensures that it only keys on him, since you will place this somewhere near his residence. A friend of mine did this with great success, since he took a regular breaker box, and mounted it on a light pole near the guy's house, along with a bunch of other boxes that were on the pole already, and ran a 9-foot wire up the pole. It was quite a while before the power company discovered the 'superfluous" box on the back of the light pole, long after it had served its purpose well. the 12- volt car battery that ran it lasted over a month with this setup............. total cost ? it might have cost two or three dollars to make the circuit on a piece of perfboard... "Caveat Lector" wrote in message news:iF36b.28605$S_.20371@fed1read01... Golly -- FYI: Jamming is illegal -- subject to an FCC fine -- 73 From The Signal In The Noise Caveat Lector Ya All "Limitedselection" wrote in message ... Help! I want to effectively "jam" CB reception on my property. The "jammer" would need to be low power and cover an area about as large as a 'small' city block. I have searched google, but I have only found references to schematics that were either posted to usenet as a picture (thus not saved in google archives), or located on web servers in domains that no longer exist. Any information would be appreciated! |
In the final analysis, they do a pretty good job of jamming each other.
"J M Noeding" wrote in message ... On 14 Sep 2003 07:39:17 GMT, (Limitedselection) wrote: Subject: want circuit/schematic for CB "jammer" From: (Robert F Wieland) Date: 9/13/2003 12:57 PM Pacific Daylight Time Message-id: In article , Limitedselection wrote: To "Caveat Lector": Thanks for your 'help'! Apparently you are a lawyer (or play one on usenet)? You don't need to be a lawyer to know the law, nor a weatherman to know which way the wind blows. You will be interfering with an authorized radio service. That's illegal. You will be transmitting (outside Part 15 limits) without a license. That's illegal. You will be putting on the air transmitting equipment that is neither inspected-and-accepted nor type-accepted. That's illegal. You do not own nor control the airwaves on your property. I could try to list the things that are illegal even though you own the property they're done on, except that I have a 10-Meg limit on my temporary file size. I agree you probably won't get caught, but don't kid yourself about what you're doing... -- R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W Icom R75 Heathkit GR-81 Inverted-L in the attic Reply to wieland at me dot udel dot edu Wieland, I am not kidding myself. I never stated, asserted, proposed or implied that jamming was legal. I am very sorry that you completely misinterpreted my post. I know that it jamming is illegal, okay Wieland? Thanks for your help! a friend made a jammer for a difficult person who caused a lot of problems for the surrounding world. The jammer had photodiode, and would only operate when dark, it transmitted only after a CB transmission - for the next 20 minutes causing reception impossible for this guy, and it was hidden in a nearby trea So this bloke couldn't make 2-way communication and after some time resigned to find a new house somewhere far away from this place He had caused very much problems running high power and blocking TV-and broadcast-reception, so it was a good idea to keep him from activitating the CB or what ever band It happened many years ago, but still it is told to amuse the friends -jm -- remove ,xnd to reply (Spam precaution!) |
In the final analysis, they do a pretty good job of jamming each other.
"J M Noeding" wrote in message ... On 14 Sep 2003 07:39:17 GMT, (Limitedselection) wrote: Subject: want circuit/schematic for CB "jammer" From: (Robert F Wieland) Date: 9/13/2003 12:57 PM Pacific Daylight Time Message-id: In article , Limitedselection wrote: To "Caveat Lector": Thanks for your 'help'! Apparently you are a lawyer (or play one on usenet)? You don't need to be a lawyer to know the law, nor a weatherman to know which way the wind blows. You will be interfering with an authorized radio service. That's illegal. You will be transmitting (outside Part 15 limits) without a license. That's illegal. You will be putting on the air transmitting equipment that is neither inspected-and-accepted nor type-accepted. That's illegal. You do not own nor control the airwaves on your property. I could try to list the things that are illegal even though you own the property they're done on, except that I have a 10-Meg limit on my temporary file size. I agree you probably won't get caught, but don't kid yourself about what you're doing... -- R F Wieland Newark, DE 19711-5323 USA 39.68N 75.74W Icom R75 Heathkit GR-81 Inverted-L in the attic Reply to wieland at me dot udel dot edu Wieland, I am not kidding myself. I never stated, asserted, proposed or implied that jamming was legal. I am very sorry that you completely misinterpreted my post. I know that it jamming is illegal, okay Wieland? Thanks for your help! a friend made a jammer for a difficult person who caused a lot of problems for the surrounding world. The jammer had photodiode, and would only operate when dark, it transmitted only after a CB transmission - for the next 20 minutes causing reception impossible for this guy, and it was hidden in a nearby trea So this bloke couldn't make 2-way communication and after some time resigned to find a new house somewhere far away from this place He had caused very much problems running high power and blocking TV-and broadcast-reception, so it was a good idea to keep him from activitating the CB or what ever band It happened many years ago, but still it is told to amuse the friends -jm -- remove ,xnd to reply (Spam precaution!) |
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