| Page 1 of 2 | 1 | 2 |
|
|
is an STA needed to transmit data on CB channel 40?
All,
I've got a brother who works for a consulting firm whose main customer is Homeland Secrity. What the feds want to do is to be able to communicate mil-spec digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. They cannot assume that hams and ham equipment will be available, and they do not want to carry heavy equipment into a city. They want to be able to use equipment that they can readily commandeer from stores such as Radio Shack. That pretty much means CB radios. I have heard of hams working DX using 5 watts of PSK on 10 meters using poor antennas, so that gives me the idea that Guard units could form medium range mobile networks using 5 watts of PSK on 11 meters using wires dropped off bridges. Eventually the hams that do get on the scene could set up a CB to HF gateway so that the packets could make it out from the Guards to the NGOs. While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I told him true, but that does not help me as an OEM getting fined for testing out an emergency scenario in a nonemergency situation. Suggestions? The Eternal Squire |
is an STA needed to transmit data on CB channel 40?
The CB band is close enough to the 10m amateur band ,such that when the
test is done within the amateur band it would also be valid for the CB band . Although you might have to do the test in the 10m amateur band with 300 baud ,whereas in the CB band you could use 1200 Baud. Unless the 300 Baud limit in amateur allocated HF bands has been / can be lifted. Frank GM0CSZ / KN6WH =============================================== While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I told him true, but that does not help me as an OEM getting fined for testing out an emergency scenario in a nonemergency situation. Suggestions? The Eternal Squire |
is an STA needed to transmit data on CB channel 40?
wrote in message oups.com... All, I've got a brother who works for a consulting firm whose main customer is Homeland Secrity. What the feds want to do is to be able to communicate mil-spec digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. I can't believe they would be asking a company with such a lack of knowledge that you have to post a message to a newsgroup! I think you're telling a bit of a fairy tale. They wouldn't be using CB as there is a vast array of communications equipment already in use - or did your brother forget to tell you that. What's the name of his company so we can all avoid what appears to be bunch of amateurs. |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
wrote in message
oups.com... All, I've got a brother who works for a consulting firm whose main customer is Homeland Security. Please supply me this consulting firm name. Is this former FEMA director Mike Brown's consulting firm by chance? |
is an STA needed to transmit data on CB channel 40?
In article .com,
wrote: While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I told him true, but that does not help me as an OEM getting fined for testing out an emergency scenario in a nonemergency situation. I think you're correct. Part 95, section 631 (c) and (e) and (f) make it quite clear that data transmission over CB is a no-no. In addition, the simple act of hooking up a data transmission circuit to a CB radio's modulator might be considered to be enough of a modification to void the transmitter's certification. Applying for an STA certainly seems to be the safe thing to do. And, if you get one yourself, the end-user agency should probably also get one, so they can run periodic tests and drills without breaking the rules. -- Dave Platt AE6EO Hosting the Jade Warrior home page: http://www.radagast.org/jade-warrior I do _not_ wish to receive unsolicited commercial email, and I will boycott any company which has the gall to send me such ads! |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
) writes:
While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I think this is a misreading of the rules. Yes, if someone's ship is sinking, or someone is lost in the mountains, it is far better to use what's available than die. But, I seem to recall some cases in the US where someone just blasted away, and it was deemed later that the emergency was not serious enough. But, the scenario you are talking about is not the same thing. You aren't talking about someone trying anything to save themselves, you are talking about organized emergency work. And once that starts happening, you can't have anything goes, for the same reasons that there are rules to regulate radio under non-emergency conditions. If you blast away at any frequency or any power, then you could so easily interfere with some other legitimate emergency communication. Your communication may not be more important than someone else's, and hence frequency coordination is just as important. It has been long argued that one reason to keep amateur radio around is that in the case of a big emergency, it's relatively easy to put amateur radio to rest, and then you get some big chunks of spectrum that won't be used for necessary or emergency communication. IN other words, using amateur radio frequencies is one scenario that is already planned if the emergency is important enough (aside from it being used as auxiliary communication with hams using their existing equipment. But, life goes on, and you can't superimpose a lot of communication onto frequencies that are needed for existing communication needs which won't go away when an emergency comes along. And on a completely other note, as others have pointed out, even if an existing communication band is the only choice, there are far better choices than the 27MHz band. A big problem of that band is that when the skip is in, it's made fairly useless because distant stations come in nice and strong. And likewise, you want a band that's good for local communication, and the fact that you can get great range under good conditions on 10meters is not the same as getting good reliable local communication. Michael VE2BVW |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
wrote in message oups.com... All, I've got a brother who works for a consulting firm whose main customer is Homeland Secrity. What the feds want to do is to be able to communicate mil-spec digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. They cannot assume that hams and ham equipment will be available, and they do not want to carry heavy equipment into a city. They want to be able to use equipment that they can readily commandeer from stores such as Radio Shack. That pretty much means CB radios. I have heard of hams working DX using 5 watts of PSK on 10 meters using poor antennas, so that gives me the idea that Guard units could form medium range mobile networks using 5 watts of PSK on 11 meters using wires dropped off bridges. Eventually the hams that do get on the scene could set up a CB to HF gateway so that the packets could make it out from the Guards to the NGOs. While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I told him true, but that does not help me as an OEM getting fined for testing out an emergency scenario in a nonemergency situation. Suggestions? The Eternal Squire IMHO The feds have plenty of radio equipment with comms operators that could be shipped to disaster hit area faster than your average guards unit could adapt/setup a purloined unit. |
is an STA needed to transmit data on CB channel 40?
Brian 2W0BDW wrote: wrote in message oups.com... All, I've got a brother who works for a consulting firm whose main customer is Homeland Secrity. What the feds want to do is to be able to communicate mil-spec digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. They cannot assume that hams and ham equipment will be available, and they do not want to carry heavy equipment into a city. They want to be able to use equipment that they can readily commandeer from stores such as Radio Shack. That pretty much means CB radios. I have heard of hams working DX using 5 watts of PSK on 10 meters using poor antennas, so that gives me the idea that Guard units could form medium range mobile networks using 5 watts of PSK on 11 meters using wires dropped off bridges. Eventually the hams that do get on the scene could set up a CB to HF gateway so that the packets could make it out from the Guards to the NGOs. While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I told him true, but that does not help me as an OEM getting fined for testing out an emergency scenario in a nonemergency situation. Suggestions? The Eternal Squire IMHO The feds have plenty of radio equipment with comms operators that could be shipped to disaster hit area faster than your average guards unit could adapt/setup a purloined unit. Thank you all for your suggestions. This is not a hoax. But I too find the need sufficiently implausible that I feel a little bit queasy taking R&D fees for a cause like this at $50 per hour. The only reason that I'm not mentioning the consulting firm is that I could stand to get paid... and any money is better than no money. And if I'm the king's coin then I ought to make it work. I agree, Truck stops are a very good idea for commandeering CB's, but you only find those in the exurbs.. Yes, other commercial radio services could and maybe even should be drafted into this. The squad lead could then determine the tradeoffs based on the availability of foraged equipment. Allison, your idea of using the dummy loads to simulate fading over distance is OUTSTANDING. I'll do it! Using dummy loads as a demo, I could then get the consulting firm to ask the FCC for an STA for field tests. For my test rigs, I'm intending to plug in a laptop sound card I/O into the SSB mic and headphone jacks. Therefore no type acceptance needed because no mods. My brother says ideally in the scenario, each squad leader should only need to carry a mini-CDROM in his or her pocket. The squad lead could then commandeer a laptop, an SSB CB radio, and then use an abandoned automobile as an electric generator for the laptop and radio. Antenna would be flung over a 3 story office building. One of the reasons for this scenario is to lighten the overall squad load and thereby increase the speed of response. That way each squad could break into an abandoned store and then set up a first responder posts. |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
In article .com,
wrote: All, I've got a brother who works for a consulting firm whose main customer is Homeland Secrity. What the feds want to do is to be able to communicate mil-spec digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. They cannot assume that hams and ham equipment will be available, and they do not want to carry heavy equipment into a city. They want to be able to use equipment that they can readily commandeer from stores such as Radio Shack. That pretty much means CB radios. I have heard of hams working DX using 5 watts of PSK on 10 meters using poor antennas, so that gives me the idea that Guard units could form medium range mobile networks using 5 watts of PSK on 11 meters using wires dropped off bridges. Eventually the hams that do get on the scene could set up a CB to HF gateway so that the packets could make it out from the Guards to the NGOs. While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I told him true, but that does not help me as an OEM getting fined for testing out an emergency scenario in a nonemergency situation. Suggestions? The CB band is also listed under the license free regulations, Part 15 so if you run low enough power, you don't need a license, and there are no particular restrictions on mode. 15.227 Operation within the band 26.96-27.28 MHz. (a) The field strength of any emission within this band shall not exceed 10,000 microvolts/meter at 3 meters. The emission limit in this paragraph is based on measurement instrumenta-tion employing an average detector. The provisions in § 15.35 for limiting peak emissions apply. (b) The field strength of any emissions which appear outside of this band shall not exceed the general radiated emission limits in § 15.209. Channel 40 is above 27.28 MHz, about channel 27 as near as I can tell (channels are not sequential frequencies). Contrary to popular opinion, I think that a packet radio relay made with a portable computer with a sound card, a CB transceiver, and a patch cable all made from stuff that you could "liberate" from the local Radio Shack is possible. Some sort of PTT control (VOX?) would be the hardest part. Given my opinion of the average CBer's conception of "The Public Good", I don't expect that a system could run without getting the hell jammed out of it, even if the military is exempt from FCC regs. Mark Zenier Googleproofaddress(account:mzenier provider:eskimo domain:com) |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
Me wrote:
First of all: The Federal Government (ie Homeland Security, USCG, US Army, ectg) doesn't need, or require anything from the FCC, as the FCC has no jurasdiction over US Federal Government Radio Operatrions. It only regulates, non-Federal Government Communications. The Office of Telecommunications Policy, or whatever they changed the name to recently, is the Clearing House for ALL Federal Communications Operations. Second of all: Even if you did apply for an STA, the FCC wouldn't grant it for 27Mhz, as that would specifically go against a Standing FCC Regulation, and set a very bad policy statement for the future. Last of all: AM Modulation is the worst type for trying to get error free communications, and not likely to succeed without spending a pile of money in the R & D Phase of the modem part of the project. Me an ex-FCC Field Resident Agent who knows better than to go down this kind of path......... The US ARMY radio & TV station I worked at had FCC licenses hanging on the walls at Ft. Greely, back in the early '70s but they were considered "Courtesy Licenses" so the FCC knew to keep track of them when other stations were built. They had no expiration dates, now power limits, and no operating hours. They were marked "Until no longer needed", and "As deemed necessary" and at that time were issued to any long term US Government RF installation. -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
is an STA needed to transmit data on CB channel 40?
wrote: wrote: Let's see, all you have to do is find a bunch of laptops with 12V adapters, 12V power is standard power jack for laptops a bunch of CB radios with documentation on the mic input, The docs could be on the CD-ROM. Squad leader or designate could read that using the laptop. a soldering iron to make up a mic/laptop interface cable (assuming you can use the existing mic cable connector). Shouldn't be too hard. The only problem left is how to get the abandoned automobile to the top of the 3 story office building (if any are left standing in this disaster). The feed could start at street level and connect to a dipole on the rooftop. |
is an STA needed to transmit data on CB channel 40?
Me wrote: In article , (Dave Platt) wrote: In article .com, wrote: While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I told him true, but that does not help me as an OEM getting fined for testing out an emergency scenario in a nonemergency situation. I think you're correct. Part 95, section 631 (c) and (e) and (f) make it quite clear that data transmission over CB is a no-no. In addition, the simple act of hooking up a data transmission circuit to a CB radio's modulator might be considered to be enough of a modification to void the transmitter's certification. Applying for an STA certainly seems to be the safe thing to do. And, if you get one yourself, the end-user agency should probably also get one, so they can run periodic tests and drills without breaking the rules. First of all: The Federal Government (ie Homeland Security, USCG, US Army, ectg) doesn't need, or require anything from the FCC, as the FCC has no jurasdiction over US Federal Government Radio Operatrions. It only regulates, non-Federal Government Communications. The Office of Telecommunications Policy, or whatever they changed the name to recently, is the Clearing House for ALL Federal Communications Operations. Then I guess if the consulting firm can get the necessary authority to waive the need for an STA, I won't complain. Second of all: Even if you did apply for an STA, the FCC wouldn't grant it for 27Mhz, If the FCC was trying to prove itself modern for digital commo by trying to kill amateur HF using BPL, then with this they have a chance to let CB'ers enter the digital age. Maybe the FCC will go for it.. as that would specifically go against a Standing FCC Regulation, and set a very bad policy statement for the future. In other words, an Act of Congress would be necessary? Last of all: AM Modulation is the worst type for trying to get error free communications, and not likely to succeed without spending a pile of money in the R & D Phase of the modem part of the project. Using SSB CB radios. Me an ex-FCC Field Resident Agent who knows better than to go down this kind of path......... |
is an STA needed to transmit data on CB channel 40?
And tell him to buy a text book on - well, just about anything except self-promotion - he doesnt seem to know very much. Probably why hes a consultant. Is he an accountant? Nope, a geoscientist. |
is an STA needed to transmit data on CB channel 40?
Andrew VK3BFA wrote: And tell him to buy a text book on - well, just about anything except self-promotion - he doesnt seem to know very much. Probably why hes a consultant. Is he an accountant? Nope, my brother is a geophysicist. I'm the electronics person. The Eternal Squire |
is an STA needed to transmit data on CB channel 40?
wrote:
wrote: wrote: Let's see, all you have to do is find a bunch of laptops with 12V adapters, 12V power is standard power jack for laptops Funny, the last laptop I bought doesn't include a 12V cable. As a matter of fact, neither did the one before it. You had to ask for it as an add-on. a bunch of CB radios with documentation on the mic input, The docs could be on the CD-ROM. Squad leader or designate could read that using the laptop. And just where do you get this CD-ROM in a deserted, destroyed building after the catastrophe? Oh yeah, you've got the schematics of every CB radio ever made on CD-ROM already and you are taking it with you. Right, a soldering iron to make up a mic/laptop interface cable (assuming you can use the existing mic cable connector). Shouldn't be too hard. Of course every squad made up of random troops from the motor pool and the rifle squad has a portable soldering iron, knows how to solder and has solder. Or or all these troops going to come from the Signal School? Oh, wait, they are going to commandeer the soldering irons and solder from the destroyed businesses and plug the irons into the none-functioning AC grid, and learn how to solder from a CD-ROM. How could I have been so stupid with only 30 years in the Army? Maybe from teaching soldering classes? The only problem left is how to get the abandoned automobile to the top of the 3 story office building (if any are left standing in this disaster). The feed could start at street level and connect to a dipole on the rooftop. So where do you get the custom power cable or antenna cable to go up three stories? Three stories worth of cable is going to weigh a lot more than most radios these days. Might as well bring the radios with built in antennas and battry packs. -- Jim Pennino Remove .spam.sux to reply. |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
On Mon, 19 Jun 2006 23:10:14 GMT, **THE-RFI-EMI-GUY**
wrote: SSB CB radios are pretty rare items in most circles, in fact the troops trying to commandeer CB's might not be aware of the difference and will try to use standard CB's and they won't work in the "net". Secondly, SSB CB's have a clarifier control that has to be adjusted. This is easy enough with voice, but with data, it is not as easy to do by "ear". You will have to incorporate some sort of tuning scheme in your software. You are better off with AM because of these limitations. Are you going to have a field expedient handbook so that the troops can figure out which mike wires are which? It is not that easy to figure out if you are Thats funny! Actually CB radios are very diverse with their mic wiring and switching schemes as in if not done correctly they will not transmit _or_ recieve. It's a bad idea and deserves to die an expedient death. It would be far easier to mass produce a UHF FM radio based on GMRS chipsets with a digital interface. Then give everyone a box of them and a box of batteries. Allison unfamiliar with radio. Your idea of a software solution reminds me of the BAYCOM TNC modems of the 80's. You might want to research those. You should be able to get 3 to 5 times that rate in the consulting world by the way. wrote: Brian 2W0BDW wrote: wrote in message egroups.com... All, I've got a brother who works for a consulting firm whose main customer is Homeland Secrity. What the feds want to do is to be able to communicate mil-spec digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. They cannot assume that hams and ham equipment will be available, and they do not want to carry heavy equipment into a city. They want to be able to use equipment that they can readily commandeer from stores such as Radio Shack. That pretty much means CB radios. I have heard of hams working DX using 5 watts of PSK on 10 meters using poor antennas, so that gives me the idea that Guard units could form medium range mobile networks using 5 watts of PSK on 11 meters using wires dropped off bridges. Eventually the hams that do get on the scene could set up a CB to HF gateway so that the packets could make it out from the Guards to the NGOs. While I am more than willing to test this setup out for my brother on a pair of CB radios, I told him I might need an STA from the FCC to communicate data on CB channel 40. He tells me that in an emergency, anyone can use any frequencies they want, any power, any mode. I told him true, but that does not help me as an OEM getting fined for testing out an emergency scenario in a nonemergency situation. Suggestions? The Eternal Squire IMHO The feds have plenty of radio equipment with comms operators that could be shipped to disaster hit area faster than your average guards unit could adapt/setup a purloined unit. Thank you all for your suggestions. This is not a hoax. But I too find the need sufficiently implausible that I feel a little bit queasy taking R&D fees for a cause like this at $50 per hour. The only reason that I'm not mentioning the consulting firm is that I could stand to get paid... and any money is better than no money. And if I'm the king's coin then I ought to make it work. I agree, Truck stops are a very good idea for commandeering CB's, but you only find those in the exurbs.. Yes, other commercial radio services could and maybe even should be drafted into this. The squad lead could then determine the tradeoffs based on the availability of foraged equipment. Allison, your idea of using the dummy loads to simulate fading over distance is OUTSTANDING. I'll do it! Using dummy loads as a demo, I could then get the consulting firm to ask the FCC for an STA for field tests. For my test rigs, I'm intending to plug in a laptop sound card I/O into the SSB mic and headphone jacks. Therefore no type acceptance needed because no mods. My brother says ideally in the scenario, each squad leader should only need to carry a mini-CDROM in his or her pocket. The squad lead could then commandeer a laptop, an SSB CB radio, and then use an abandoned automobile as an electric generator for the laptop and radio. Antenna would be flung over a 3 story office building. One of the reasons for this scenario is to lighten the overall squad load and thereby increase the speed of response. That way each squad could break into an abandoned store and then set up a first responder posts. |
is an STA needed to transmit data on CB channel 40?
On Sun, 18 Jun 2006 20:24:04 UTC, Jim Higgins
wrote: About all you're going to commander from Radio Shack is cell phones. I smell a hoax... That's close... though it wouldn't surprise me to find an absolutely clueless consulting firm sucking up Homeland Security money and Homeland Security tossing money around to every clueless Tom, Dick and Harry like it was water. I bet that's it. I'm in WAAA-shington and it is incredible how absolutely clueless the folks who staff the consulting firms are. They'll seize upon a buzzword or a weird concept and, bing, the word processors and powerpoint presentations are running full time, filling the air with blather. Handwaving, spewing the jive. Let's be clear. The concept makes no sense at all. Others have detailed the technical and practical issues. What does work is standard military comm gear, ruggedized, charged up and ready to use. This is America. The guard or whoever already has comm gear, likely as good as stuff used by 14 year old mall-kids. If they don't, then it's a simple matter to deliver it to them from a depot. In the absense of a problem, a consulting firm will imagineer one and, let the spew-games begin. This is WAAA-shington. Blather and cluelessness abound. They might be filing for a proof-of-concept, stage one, small-business-innovative-research contract, twenty-five or fifty grand of your money pays for a lot of USENET trollin' and wacky verbage. Even scarier, if they make the first cut, the next level is a quarter million to a half million dollars of YOUR money. -c -- |
is an STA ..more like a rules change
|
is an STA needed to transmit data on CB channel 40?
wrote:
wrote: And just where do you get this CD-ROM in a deserted, destroyed building after the catastrophe? Clearly you are only skimming my posts rather than reading them.A Actually, I was reading them and comparing them against my real world experiences with combat boots in the dirt. Starting at the beginning: 1) Squad leader carries a mini-CDROM in his/her pocket. That's the nucleus for everything else. With luck, nothing else need be carried into the field.A A military force that goes into the field depending on luck is doomed to failure. It doesn't matter if it is a combat situation in foreign land or a simple training exercise within sight of a major US city. If you don't have everything you need going in, or at least a supply chain that can get it to you quickly, someone is going to be hurt. This comes from bitter experience. 2) The CDROM would contain schematics and part numbers of everything necessary to forage to create a datalink. You are going to supply an up to date CDROM containing all the info for all the CB radios in the US? Yeah, that's going to happen 3) SSB CB Radios (funny, my RS always carries the SSB CB radio as the high end model) would be one of several pieces of RF equipment that could be foraged off the street (i.e. Radio Shack stores, truck stops, etc). Assuming there were such stores in the first place and they aren't flattened/flooded by whatever the catastrophe was. 4) Most new laptops carry 12V power input. Older ones don't. There are plenty of sources to forage a laptop from: Target, Walmart, and K-mart come to mind as well as Radio Shack. Getting a laptop is a minor problem. Getting a 12V DC connector and someone that knows how to wire to a field expediate power source correctly is a major problem. 5) The laptop, radio, and car are all at street level. People can take plain old copper wire and make a dipole or inverted Vee with it, hanging it from the roof top. The only actual ground to antenna connnection comes between the radio and the center of the dipole or inverted Vee. Where does the antenna feed cable come from? The collapsed/flooded store? Where do you get the person that knows how to wire up an antenna and feed cable? Where do you get the person that knows how to cut a dipole or inverted-vee, or even what those terms mean? Most troops are really good at what they are trained for. Few troops have been trained in anything to do with electronics or even electricty. Special Forces troops are probably the most veratile of troops (and the smallest in number), but without the training they would be useless. You want them to parachute in during the dark of night, take and hold a tactical position, no problem. You want them to cut and connect a diplole, big problem Upon what do I base these statements? Years spent teaching such subjects to troops. Caught up now? I never was behind. You, however, have no concept of what it is like to have boots in the dirt. -- Jim Pennino Remove .spam.sux to reply. |
is an STA needed to transmit data on CB channel 40?
wrote in message ... wrote: wrote: wrote: Let's see, all you have to do is find a bunch of laptops with 12V adapters, 12V power is standard power jack for laptops Funny, the last laptop I bought doesn't include a 12V cable. As a matter of fact, neither did the one before it. You had to ask for it as an add-on. I guess it is the new laptops that use 12v, the only laptops I have here have an 18v adaptor for the Zenith or 120v input for the Toshibas. I guess noone will be borrowing mine to use in an emergency. What sort of emergency responders are going to be sent in with no equipment? With the right soundcard software a laptop could emulate a bell 202 or 103 modem over AM radio, even with packet error checking to reduce transmission errors. What no one has mentioned yet is channel usage, one simplex data channel for an entire disaster area with no provision for collision detection between users other than just listening for someone else transmitting? With the central data collection point high enough to cover the entire area, you will be in the position that each transmitter may not hear another but the reciever can hear both while transmitting at the same time. The data collector would spend quite a bit of time acting as net control determining which remote site was allowed to transmit at any particular time. Just my $.02 on this poorly thought out idea. thanks, John. KC5DWD |
is an STA needed to transmit data on CB channel 40?
On Sun, 18 Jun 2006 10:41:25 -0700, eternalsquire wrote:
All, I've got a brother who works for a consulting firm whose main customer is Homeland Secrity. snip It's against the law for feds to use freqs not assigned to them. At least by design. |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
Andrew VK3BFA wrote:
And you, sir, have been told, repeatedly, by ex military comms people (amongst others) thats its just a plain downright, stupid, time wasting, idiotic, non feasible "idea". Does it need to be spelt out any clearer than that? What dont you understand? Seriously, hams have long been responsible for taking time wasting idiotic non feasible "ideas" and VERY occasionally turning them into serious modes of communications. I agree that in this particular case the original idea has several enormous flaws. But with some of the modifications suggested here I think there may be something of some value in some emergency circumstances. Certainly the professionals who set up digitally trunked comm systems have a less than stellar track record at actual success ( do NOT confuse with "contractual success") and I have a large chip on my shoulder regarding ALL the billions of dollars that they've wasted at taxpayer expense. Not to mention the distortions they've caused to frequency allocations that actually WERE previously useful. And you would be SERIOUSLY surprised at some of the far stupider flawed ideas that are being funded by government agencies. Tim. |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
I never was behind. You, however, have no concept of what it is like to have boots in the dirt. Your prolly talking to one of those Pencil Pushing pentagon admin types we had to deal with :D. They have no concept what its like to be in the field. |
is an STA needed to transmit data on CB channel 40?
Mark Zenier wrote:
snip Contrary to popular opinion, I think that a packet radio relay made with a portable computer with a sound card, a CB transceiver, and a patch cable all made from stuff that you could "liberate" from the local Radio Shack is possible. Some sort of PTT control (VOX?) would be the hardest part. It is not a matter of being possible to do by someone who knows what they are doing. It is a matter of being practical to do by random, untrained people, and doing it many times. snip remaining -- Jim Pennino Remove .spam.sux to reply. |
is an STA needed to transmit data on CB channel 40?
What the feds want to do is to be able to communicate mil-spec
digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. ==================================== Americans are always planning for war. It's an inbuilt disposition. That's the best way of guaranteeing they will get it sooner or later. Witness Vietnam, Iraq, Afganistan, Palestine and many other places. But keep the Chinese, Russians and Indians in mind. No danger from them. But they are in a position to retaliate in kind. Why not plan for Peace! It's safer! |
is an STA needed to transmit data on CB channel 40?
|
is an STA needed to transmit data on CB channel 40?
Wars may be disasters, but disasters are not wars.
Reg Edwards wrote: What the feds want to do is to be able to communicate mil-spec digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. ==================================== Americans are always planning for war. It's an inbuilt disposition. That's the best way of guaranteeing they will get it sooner or later. Witness Vietnam, Iraq, Afganistan, Palestine and many other places. But keep the Chinese, Russians and Indians in mind. No danger from them. But they are in a position to retaliate in kind. Why not plan for Peace! It's safer! |
is an STA needed to transmit data on CB channel 40?
Reg Edwards wrote:
What the feds want to do is to be able to communicate mil-spec digital packets over low power links in the middle of a disaster-hit area between squads of Guards deployed across a destroyed city. ==================================== Americans are always planning for war. It's an inbuilt disposition. That's the best way of guaranteeing they will get it sooner or later. Witness Vietnam, Iraq, Afganistan, Palestine and many other places. But keep the Chinese, Russians and Indians in mind. No danger from them. But they are in a position to retaliate in kind. Why not plan for Peace! It's safer! Sure, do like you and spend your whole life with your head between your legs as you kiss your life good-bye. What a pathetic loser. If the rest of england had had your view you would have let Hitler have the keys to Buckingham Palace as his troops shot the men and raped the women. How wide is that yellow stripe? -- Service to my country? Been there, Done that, and I've got my DD214 to prove it. Member of DAV #85. Michael A. Terrell Central Florida |
is an STA needed to transmit data on CB channel 40?
Its just not good business. Peace works against Fear, Uncertainty and
Doubt, the prime movers of the business world. Why would you suggest such an irrational thing? Reg Edwards wrote: Why not plan for Peace! It's safer! -- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P |
is an STA needed to transmit data on CB channel 40?
Its just not good business. Peace works against Fear, Uncertainty and
Doubt, the prime movers of the business world. Why would you suggest such an irrational thing? Reg Edwards wrote: Why not plan for Peace! It's safer! -- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P |
| All times are GMT +1. The time now is 05:17 AM. |
|
Powered by vBulletin® Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
RadioBanter.com