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Could this device be built?
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Could this device be built?
wrote in message ... In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. 10.4 * 10**6 * 6 * 10**-6 = 62.4 watts average power. Hawk 2nd generation tracking HPIR CW RADAR AN/MPQ 39 power seems to have not yet been revealed publicly. It has been publicly stated that the AN/MPQ 39 power output level exceeded that of the earlier AN/MPQ 33, which was 125 watts. This is a vast understatement! |
Could this device be built?
In sci.physics Michael A. Terrell wrote:
wrote: The Battery Commander may have held the paper, but the Maintenance Chief, which I was, for all intents and purposes owned the system as much as any piece of issued military equipment can be owned. Yeah? Then I want my AFRTS radio and TV stations back. I never did anything with TV stations, but I also have some time instructing maintenance on the 50 kW AM transmitters used by AFRS; the mobile version the CA troops would role in after a dust up to calm the locals. Been there, done that, got a DD-214, a life-time ID card and a monthly check from Dfas-Cleveland. -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
In sci.physics Arny Krueger wrote:
wrote in message ... In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. 10.4 * 10**6 * 6 * 10**-6 = 62.4 watts average power. Hawk 2nd generation tracking HPIR CW RADAR AN/MPQ 39 power seems to have not yet been revealed publicly. It has been publicly stated that the AN/MPQ 39 power output level exceeded that of the earlier AN/MPQ 33, which was 125 watts. This is a vast understatement! You forgot to allow for the PRT. The HIPAR average power was 26 kW. The LOPAR was 1 MW peak, 1.3 microseconds pulse width, 650 W average. The Hawk was OK when it worked instead of digging trenches while chasing jack rabbits around McGreggor Range. I heard the latest generation of Hawk doesn't do that. -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
Paul E. Schoen wrote:
"Spob" wrote in message ups.com... Sitting at a gas station as some backwards baseball cap and saggass britches wearing kid parks in the fire zone in front of the store with some fukdamuhfukinniggahbeyotch crap blasting out of his truck for everyone's entertainment, got me to thinking. Would it be possible to build a gizmo that could be surreptitiously aimed at the offending stereo system to fry some crucial components? It would have to be able to do it on a pretty localized basis without causing damage to the person aiming the gizmo or innocent bystanders or their car's electronics. Whether it would fry any additional components of said target punk's car isn't of great concern. Call it The Rapper Zapper. Just wonderin'. :-) I saw a device called "The Mosquito", that emits high frequency audio noise that can be heard by most young people, and not so much by more mature adults. Surely most rappers have ruined their ears by now. I saw an article recently that proclaimed (almost with pride) that a particular audio device being touted could cause permanent hearing loss within an hour. These devices can be installed where these punks hang out, and eventually they find it irritating enough to move on to some other place. Probably such a device with power great enough, and a focused speaker, could be directed at the miscreant and make him very uncomfortable. Another possibility is a similar focused sound transmitter that would very loudly play Opera, or Polka. Even better, mix the two together and really scramble the few remaining brain cells of the offender. Have an automatic volume control to set the transmitted sound level to be proportional to that detected. Probably 140 db of Kathleen Battle and Happy Louie would do the job. And be at least as legal as the offender's subwoofer. But I'd also want to have backup from my buddies Smith and Wesson! Paul -- The e-mail address in our reply-to line is reversed in an attempt to minimize spam. Our true address is of the form . |
Could this device be built?
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Could this device be built?
In sci.physics John Larkin wrote:
On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
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Could this device be built?
On Aug 19, 6:15 pm, wrote:
In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. -- Jim Pennino Remove .spam.sux to reply. As the temperature rises due to frequency increase, the "lines of polarizability" begin to destabilize to the point where M becomes zero because the thermal energy is greater than that supplied by the internal field. More than *one* waveguide, then. |
Could this device be built?
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Could this device be built?
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Could this device be built?
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Could this device be built?
In sci.physics 77ogrA wrote:
On Aug 19, 6:15 pm, wrote: In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. -- Jim Pennino Remove .spam.sux to reply. As the temperature rises due to frequency increase, the "lines of polarizability" begin to destabilize to the point where M becomes zero because the thermal energy is greater than that supplied by the internal field. More than *one* waveguide, then. What temperature rise due to what frequency increase? This sounds like babble to me. -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
On Aug 19, 7:25 pm, wrote:
In sci.physics 77ogrA wrote: On Aug 19, 6:15 pm, wrote: In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. -- Jim Pennino Remove .spam.sux to reply. As the temperature rises due to frequency increase, the "lines of polarizability" begin to destabilize to the point where M becomes zero because the thermal energy is greater than that supplied by the internal field. More than *one* waveguide, then. What temperature rise due to what frequency increase? This sounds like babble to me. -- Jim Pennino Remove .spam.sux to reply. Increased "pulse repetition rate" is also pulse repetition "frequency".At a high enough repetition rate(frequency) a device heats up to the point where it stops becoming a wave guide and becomes a hot widget. I have made BaTiO3 waveguides, among others.What did *you* mean by "waveguide"? Leo "thanks" Sgouros |
Could this device be built?
Spob wrote:
Sitting at a gas station as some backwards baseball cap and saggass britches wearing kid parks in the fire zone in front of the store with some fukdamuhfukinniggahbeyotch crap blasting out of his truck for everyone's entertainment, got me to thinking. Would it be possible to build a gizmo that could be surreptitiously aimed at the offending stereo system to fry some crucial components? It would have to be able to do it on a pretty localized basis without causing damage to the person aiming the gizmo or innocent bystanders or their car's electronics. Whether it would fry any additional components of said target punk's car isn't of great concern. Call it The Rapper Zapper. Just wonderin'. If you figure it out, maybe we could come up with a sequel in the "Phone Phryer" - something to nuke cel phones of gabbing drivers. Or at least some kind of jammer for use in movie theaters and what not... |
Could this device be built?
wrote in message ... In sci.physics Arny Krueger wrote: wrote in message ... In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. 10.4 * 10**6 * 6 * 10**-6 = 62.4 watts average power. Hawk 2nd generation tracking HPIR CW RADAR AN/MPQ 39 power seems to have not yet been revealed publicly. It has been publicly stated that the AN/MPQ 39 power output level exceeded that of the earlier AN/MPQ 33, which was 125 watts. This is a vast understatement! You forgot to allow for the PRT. Which was? The HIPAR average power was 26 kW. Then it was a whole 'nuther thing compared the pulse ack that was part of the Hawk system I worked on. The LOPAR was 1 MW peak, 1.3 microseconds pulse width, 650 W average. The Hawk was OK when it worked instead of digging trenches while chasing jack rabbits around McGreggor Range. Admittedly, not a lot of techs could keep the Hawk CW equipment working reliably. Many stuggled to get through their one week a month. I heard the latest generation of Hawk doesn't do that. For openers, the Improved Hawk, which was still on the horizon when I ETS'd out, was finally solid state. The biggest detriments to the Hawk I worked on were the 100's of tubes ( about 400 in one HIPIR), and the fact that everything was Doppler which means broadband audio (30-30KHz). MTBF was about day, but only on a good day. Some subsytems were DC-coupled. There were zillions of adjustments and many had to be done several times a day. We had two pulse radars on site, and they almost fixed and ran themselves in comparison to the Doppler sets. At this point the whole Hawk fire control system can sit on the tailgate of a HumVee, has over twice the range, runs almost forever without maintenance, and can track zillions of targets concurrently. It is Doppler-pulse. |
Could this device be built?
wrote in message ... I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. I've definately seen waveguide with holes burned in it by RF. Waveguide size is set by the operating frequency. For X-band, the smallest dimension is less than a half of an inch. If you put the right stuff in the waveguide, it still passes a signal well and you raise the arc-over point dramatically. Phased-array radars have very many small antennas, transmitters and receivers. Each one handles only modest amounts of power. |
Could this device be built?
wrote in message ... Nike HIPAR, 10.4 MW, pulse width 6 microseconds. I believe there was a radar in that class that operated next to I-75 in Sault St Marie, Michigan. Every time the antenna rotated past the freeway, you'd hear the PRF though your car radio as a "zzzzzip". |
Could this device be built?
Spob wrote:
Would it be possible to build a gizmo that could be surreptitiously aimed at the offending stereo system to fry some crucial components? It would have to be able to do it on a pretty localized basis without causing damage to the person aiming the gizmo or innocent bystanders or their car's electronics. Whether it would fry any additional components of said target punk's car isn't of great concern. Sure. Remington and Winchester both make products that will do precisely this thing. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
Could this device be built?
In sci.physics 77ogrA wrote:
Increased "pulse repetition rate" is also pulse repetition "frequency".At a high enough repetition rate(frequency) a device heats up to the point where it stops becoming a wave guide and becomes a hot widget. I have made BaTiO3 waveguides, among others.What did *you* mean by "waveguide"? Leo "thanks" Sgouros A rectangular metal tube. -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
In sci.physics Arny Krueger wrote:
wrote in message ... I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. I've definately seen waveguide with holes burned in it by RF. Waveguide size is set by the operating frequency. For X-band, the smallest dimension is less than a half of an inch. If you put the right stuff in the waveguide, it still passes a signal well and you raise the arc-over point dramatically. The "right stuff" is usually dry air, sometimes dry nitrogen. Phased-array radars have very many small antennas, transmitters and receivers. Each one handles only modest amounts of power. No ****? -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
wrote in message ... In sci.physics Arny Krueger wrote: wrote in message ... I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. I've definately seen waveguide with holes burned in it by RF. Particularly in Miami. It got to be old - the PAR would start failing, a piece of waveguide might get holed, and then the water-soaked air dryer would be towled out and reloaded with dessicant. Waveguide size is set by the operating frequency. For X-band, the smallest dimension is less than a half of an inch. If you put the right stuff in the waveguide, it still passes a signal well and you raise the arc-over point dramatically. The "right stuff" is usually dry air, sometimes dry nitrogen. I never worked around any radars that used anything more sophisiticated than dry air. Dry air turned out to be dicy in Miami, because of the humid air. I've heard about waveguide that was based on ceramics, I wonder if the ceramic was the dielectric. I think that many ceramics have far higher breakdown voltages than dry air. Phased-array radars have very many small antennas, transmitters and receivers. Each one handles only modest amounts of power. No ****? ;-) The point being, this is how really impressive power levels can be achieved with relatively low tech waveguide, etc. |
Could this device be built?
In sci.physics John Larkin wrote:
On Sun, 19 Aug 2007 23:15:03 GMT, wrote: In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? Dunno, but high enough to be useful in a combat jet. It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. No, that's real power. The planes are tiled with a bunch of 4" square transmitter/antenna things, pulsing something like 100 megawatts each. Google words like hpm weapon, array radar, e-bomb, BAE, F-22. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. I'd imagine lots of people would like to know that stuff. John OK, you're not talking about a radar, you're talking about an EMP weapon. -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
Smith & Wesson makes something that will do a pretty good job.
-- Paul Hovnanian ----------------------------------------------------------------------- There is no place like 127.0.0.1. |
Could this device be built?
On Aug 20, 11:31 am, "Paul Hovnanian P.E." wrote:
Smith & Wesson makes something that will do a pretty good job. -- Paul Hovnanian ----------------------------------------------------------------------- There is no place like 127.0.0.1. How about a high-powered laser that could be used to flatten tires or melt holes in metal from a 15' distance? H. R. Hofmann |
Could this device be built?
On Mon, 20 Aug 2007 06:12:50 GMT, Matt Ion
trained 100 monkeys to jump on the keyboard and write: Or at least some kind of jammer for use in movie theaters and what not... Actually, this device is actually made and in use, though not nearly as widespread as one would hope. To paraphrase Joss Whedon via Reverend Book, "They'll be going to that special hell reserved for people who talk at the theatre". -- jtougas "listen- there's a hell of a good universe next door let's go" - e.e. cummings |
Could this device be built?
In message , Dan
writes But you would also fry ALL the electronics around that car. Big lawsuit potential. Better to just let them go deaf. That's exactly what you should do. I have invested heavily in Amplivox hearing aid stocks, it's a long term thing but I feel I'm on a winner. -- Clint Sharp |
Could this device be built?
On Mon, 20 Aug 2007 16:25:02 GMT, wrote:
In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 23:15:03 GMT, wrote: In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? Dunno, but high enough to be useful in a combat jet. It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. No, that's real power. The planes are tiled with a bunch of 4" square transmitter/antenna things, pulsing something like 100 megawatts each. Google words like hpm weapon, array radar, e-bomb, BAE, F-22. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. I'd imagine lots of people would like to know that stuff. John OK, you're not talking about a radar, you're talking about an EMP weapon. It's apparently both. Plus it seems to be able to blast all available data to a satellite so headquarters has a full 3D view of the entire theatre, everything all the planes and drones can see. John |
Could this device be built?
Jumpster Jiver wrote:
Spob wrote: Sitting at a gas station as some backwards baseball cap and saggass britches wearing kid parks in the fire zone in front of the store with some fukdamuhfukinniggahbeyotch crap blasting out of his truck for everyone's entertainment, got me to thinking. Would it be possible to build a gizmo that could be surreptitiously aimed at the offending stereo system to fry some crucial components? It would have to be able to do it on a pretty localized basis without causing damage to the person aiming the gizmo or innocent bystanders or their car's electronics. Whether it would fry any additional components of said target punk's car isn't of great concern. Call it The Rapper Zapper. Just wonderin'. :-) In the 80's there were lots of people in my neighborhood with illegal linear amplifiers on their CB radios. When they would key up these unregulated, unshielded transmitter would put out harmonics on all the radio and TV stations within a mile or so. This loud annoying buzz would probably damage the speakers and amps of such a system. This would definitely be illegal in the USA and probably other countries but it would do the trick. Friend had one of these in the neighborhood. The jerk even used an old TV antenna so it wouldn't be 'obvious' it was him, which just tended to better radiate the offending frequencies. So, friend walked up to jerks house, and put a staple through the twin-lead. Jerk keys up next, and magic smoke is released in plentitude! Charlie |
Could this device be built?
In sci.physics John Larkin wrote:
On Mon, 20 Aug 2007 16:25:02 GMT, wrote: In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 23:15:03 GMT, wrote: In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? Dunno, but high enough to be useful in a combat jet. It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. No, that's real power. The planes are tiled with a bunch of 4" square transmitter/antenna things, pulsing something like 100 megawatts each. Google words like hpm weapon, array radar, e-bomb, BAE, F-22. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. I'd imagine lots of people would like to know that stuff. John OK, you're not talking about a radar, you're talking about an EMP weapon. It's apparently both. Plus it seems to be able to blast all available data to a satellite so headquarters has a full 3D view of the entire theatre, everything all the planes and drones can see. I find a combined radar/weapon in something the size of a fighter a little hard to believe. Little problems like how do you store energy on the order of hundreds of megawatts and how do you transfer it to the RF generators in nanoseconds. Wires have inductance. -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
On Mon, 20 Aug 2007 20:25:03 GMT, wrote:
In sci.physics John Larkin wrote: On Mon, 20 Aug 2007 16:25:02 GMT, wrote: In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 23:15:03 GMT, wrote: In sci.physics John Larkin wrote: On Sun, 19 Aug 2007 16:05:03 GMT, wrote: In sci.physics Arny Krueger wrote: "Ken Weitzel" wrote in message news:IsPxi.68411$_d2.64084@pd7urf3no... I do not know if the tracking radar and cop's radar gun were on the same band, however I do know that 1MW of microwaves was sufficiently nondiscriminatory at the receiving end to burn out its front end. I bet it was sufficiently nondiscriminatory at the receiving end to burn out the cop's front end, too. When people talk about megawatt radars, they are talking pulse peak powers. Radar pulses are very narrow - less than a microsecond. However, its peak voltage that usually frys semiconductors. If these megawatt-rated radars were not sending out short pulses, but continuous power, they'd have to build a commerical electrical generating plant next to them to run them in the field. Nike HIPAR, 10.4 MW, pulse width 6 microseconds. The array radars on the F-22 and JSF are reported to hit gigawatts peak, and may one day get into the terawatt range. That would be enough to fry the electronics on any current-generation missile or plane, and maybe leave tanks and ships dead and immobile. And make stealth planes un-stealthy at 100 mile ranges. BAE is developing some of the laser-fired switches that make the peak power. John A gigawatt at what pulse repetition rate; 1 pulse per hour? Dunno, but high enough to be useful in a combat jet. It may be near a gigawatt ERP, but I doubt that's watts RF into the antenna. No, that's real power. The planes are tiled with a bunch of 4" square transmitter/antenna things, pulsing something like 100 megawatts each. Google words like hpm weapon, array radar, e-bomb, BAE, F-22. I'd also like to know what you'd use for waveguide at those power levels. It's hard enough to keep moderate megawatts contained and the waveguide in one piece. I'd imagine lots of people would like to know that stuff. John OK, you're not talking about a radar, you're talking about an EMP weapon. It's apparently both. Plus it seems to be able to blast all available data to a satellite so headquarters has a full 3D view of the entire theatre, everything all the planes and drones can see. I find a combined radar/weapon in something the size of a fighter a little hard to believe. So google it and believe what you will. Little problems like how do you store energy on the order of hundreds of megawatts and how do you transfer it to the RF generators in nanoseconds. Wires have inductance. Each of the tiles apparently has local capacitive energy storage and a a laser-triggered switch that dumps the cap energy into the antenna, probably as a UWB ringing impulse. I've seen a blurred pic of the BAE switch, and it looks like a small strip of amorphous material (possibly doped diamond?) on a ceramic substrate. High peak power laser-triggered semiconductor switches have been around for a decade at least. 10KV x 10KA = 100 MW, not unreasonable if you've got G$ to spend. http://advancednano.blogspot.com/200...s-warfare.html http://en.wikipedia.org/wiki/F-35_Li...energy_weapons http://www.dsta.gov.sg/DSTA_horizons/2005/03_1.htm Cool stuff. John |
Could this device be built?
In sci.physics John Larkin wrote:
On Mon, 20 Aug 2007 20:25:03 GMT, wrote: In sci.physics John Larkin wrote: On Mon, 20 Aug 2007 16:25:02 GMT, wrote: In sci.physics John Larkin wrote: OK, you're not talking about a radar, you're talking about an EMP weapon. It's apparently both. Plus it seems to be able to blast all available data to a satellite so headquarters has a full 3D view of the entire theatre, everything all the planes and drones can see. I find a combined radar/weapon in something the size of a fighter a little hard to believe. So google it and believe what you will. Little problems like how do you store energy on the order of hundreds of megawatts and how do you transfer it to the RF generators in nanoseconds. Wires have inductance. Each of the tiles apparently has local capacitive energy storage and a a laser-triggered switch that dumps the cap energy into the antenna, probably as a UWB ringing impulse. I've seen a blurred pic of the BAE switch, and it looks like a small strip of amorphous material (possibly doped diamond?) on a ceramic substrate. High peak power laser-triggered semiconductor switches have been around for a decade at least. 10KV x 10KA = 100 MW, not unreasonable if you've got G$ to spend. The capacitor HAS to be local to get around wire inductance. OK, now you have some switched power, what generates the RF? Where do you put the receive antenna(s) if this thing is also a radar? Matter of fact, where do you put any of this stuff? There isn't that much forward looking surface on a fighter. http://advancednano.blogspot.com/200...s-warfare.html http://en.wikipedia.org/wiki/F-35_Li...energy_weapons http://www.dsta.gov.sg/DSTA_horizons/2005/03_1.htm Cool stuff. I'm not holding my breath. -- Jim Pennino Remove .spam.sux to reply. |
Could this device be built?
On Sat, 18 Aug 2007 18:05:48 -0700, Spob wrote:
Sitting at a gas station as some backwards baseball cap and saggass britches wearing kid parks in the fire zone in front of the store with some fukdamuhfukinniggahbeyotch crap blasting out of his truck for everyone's entertainment, got me to thinking. Would it be possible to build a gizmo that could be surreptitiously aimed at the offending stereo system to fry some crucial components? It would have to be able to do it on a pretty localized basis without causing damage to the person aiming the gizmo or innocent bystanders or their car's electronics. Whether it would fry any additional components of said target punk's car isn't of great concern. Call it The Rapper Zapper. Just wonderin'. Yup. http://www.glock.com/ ;-) Cheers! Rich |
Could this device be built?
wrote in message ... In sci.physics John Larkin wrote: On Mon, 20 Aug 2007 20:25:03 GMT, wrote: In sci.physics John Larkin wrote: On Mon, 20 Aug 2007 16:25:02 GMT, wrote: In sci.physics John Larkin wrote: OK, you're not talking about a radar, you're talking about an EMP weapon. It's apparently both. Plus it seems to be able to blast all available data to a satellite so headquarters has a full 3D view of the entire theatre, everything all the planes and drones can see. I find a combined radar/weapon in something the size of a fighter a little hard to believe. So google it and believe what you will. The military reference says that they power and store the energy beam equipment with resources that are used for VTOL hardware in other models. Little problems like how do you store energy on the order of hundreds of megawatts and how do you transfer it to the RF generators in nanoseconds. Wires have inductance. Wires have less inductance if they are really short. Each of the tiles apparently has local capacitive energy storage and a a laser-triggered switch that dumps the cap energy into the antenna, probably as a UWB ringing impulse. I've seen a blurred pic of the BAE switch, and it looks like a small strip of amorphous material (possibly doped diamond?) on a ceramic substrate. High peak power laser-triggered semiconductor switches have been around for a decade at least. 10KV x 10KA = 100 MW, not unreasonable if you've got G$ to spend. The capacitor HAS to be local to get around wire inductance. OK, now you have some switched power, what generates the RF? Don't know Where do you put the receive antenna(s) if this thing is also a radar? Pulse radars use the same antenna to send and receive. Matter of fact, where do you put any of this stuff? There isn't that much forward looking surface on a fighter. Put it under a streamlined radome. |
Could this device be built?
Arny Krueger wrote: 10.4 * 10**6 * 6 * 10**-6 = 62.4 watts average power. You got to be some kind of genius to do an average power calculation like that, you know that? I could understand if you were really really old like say 67 or mo-) |
Could this device be built?
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Could this device be built?
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Could this device be built?
On Mon, 20 Aug 2007 22:25:02 GMT, wrote:
OK, now you have some switched power, what generates the RF? Switched power *is* RF! John |
Could this device be built?
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