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#51
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On Tue, 04 Oct 2005 14:54:42 GMT, Wayne P. Muckleroy wrote:
Suggestion: Why don't you also broadcast such "emergency" information over the entire spectrum of wireless network frequencies? That way, you could post the information into every Usenet group on the globe. Just like you have done with these postings. Usenet being a place that only a few people access, aside from that, it's not a bad idea, actually. -- Drop the alphabet for email |
#52
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"Ari Silversteinn" wrote in message
... On Tue, 4 Oct 2005 14:57:01 +1300, Ken Taylor wrote: All agreed, but that is in a tunnel, which has the advantage of not having to overcome the still-received commercial stations. The OP wants to do this out in the open, anywhere, any time. He also wanted to do it while driving at high speed for some reason, but I think he's quietly shelved that part of the idea. Cheers. Ken MOF, it has reared its ugly hi speed head again. -- Sorry, what's 'MOF'? Ken |
#53
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"Ari Silversteinn" wrote in message
... On Mon, 3 Oct 2005 17:58:33 -0400, Fred W4JLE wrote: There are a couple of frequiencies for unlicensed low power am stations. You can see them in use by real estate folks selling houses. There are no commercial stations on the frequency. Yes, and at Disney World, etc. This is a very doable idea and may well solve FCC/DoD issues. -- When was the last time you listened to one of those frequencies? It won't get the message out where it's needed. Ken |
#54
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"Ari Silversteinn" wrote in message
... On Mon, 03 Oct 2005 14:31:36 -0700, Richard Clark wrote: On Mon, 3 Oct 2005 16:33:52 -0400, Ari Silversteinn wrote: OK, so we supply the amplification. OK, this is just a re-run of previous speculations. You don't know the depth of your energy budget crisis, do you? Open coffers. -- He wasn't referring to your finance budget, but your energy budget. I hesitate to say it can't be done in any practical sense, but that's my thought. The idea of one poster to transmit on the IF's is a good one but I didn't suggest that because you'll also kill your emergency services comm's. Incidentally, do you plan to have every loco in the US fitted out or are you going to fly the loco's to the incident site to do their stuff? Cheers. Ken |
#55
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I can't find the part of the FCC regs that provide these frequencies for
unlicensed stations. Can anybody share the chapter and verse? Jim There are a couple of frequiencies for unlicensed low power am stations. You can see them in use by real estate folks selling houses. There are no commercial stations on the frequency. Yes, and at Disney World, etc. This is a very doable idea and may well solve FCC/DoD issues. |
#56
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On Wed, 5 Oct 2005 08:09:19 +1300, "Ken Taylor"
wrote: "Ari Silversteinn" wrote in message .. . On Mon, 03 Oct 2005 14:31:36 -0700, Richard Clark wrote: On Mon, 3 Oct 2005 16:33:52 -0400, Ari Silversteinn wrote: OK, so we supply the amplification. OK, this is just a re-run of previous speculations. You don't know the depth of your energy budget crisis, do you? Open coffers. -- He wasn't referring to your finance budget, but your energy budget. I hesitate to say it can't be done in any practical sense, but that's my thought. Hi Ken, His terse reply refers to the public coffers - troughs - open for this fabulous pork barrel feast. You know, crack dealer capitalism. Nothing has to actually work, or be useful, or even be used. It just has to generate paper in one direction, and cash in the other. Ari is mining us as a dry run for all the terms, shortfalls, and fits to the jigsaw to rummage up into a proposal. 73's Richard Clark, KB7QHC |
#57
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It can be found under the section that allows a transmitter as long as it is
less than some number of milliwatts per meter. If you really need the exact section, I will drag out the regs and get it for you. "RST Engineering" wrote in message ... I can't find the part of the FCC regs that provide these frequencies for unlicensed stations. Can anybody share the chapter and verse? Jim There are a couple of frequiencies for unlicensed low power am stations. You can see them in use by real estate folks selling houses. There are no commercial stations on the frequency. Yes, and at Disney World, etc. This is a very doable idea and may well solve FCC/DoD issues. |
#58
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That is part 15 and it isn't just a couple of frequencies, it is any
frequency in the AM broadcast band (and the FM broadcast band, for that matter). Specifically, 15.219 allows operation on any frequency in the band so long as (a) the input power to the final stage is less than 100 mW and (b) the antenna "system" (radiating element, coax, and ground lead) is less than 3 meters long. 15.221 also allows operation with an unspecified power level into leaky coax with a field strength limitation. Power is not milliwatts per meter. Power is milliwatts. Field strength (also an allowed measurement) is in volts per meter. The OP said that there were a "couple of frequiencies(sic)for unlicensed low power am(sic) stations." That implied that there were a couple of frequencies that were unused in the AM band by commercial stations, and I just wanted to have a reference to WHAT they were and WHERE in the regs they were delineated. Jim "Fred W4JLE" wrote in message ... It can be found under the section that allows a transmitter as long as it is less than some number of milliwatts per meter. If you really need the exact section, I will drag out the regs and get it for you. "RST Engineering" wrote in message ... I can't find the part of the FCC regs that provide these frequencies for unlicensed stations. Can anybody share the chapter and verse? Jim There are a couple of frequiencies for unlicensed low power am stations. You can see them in use by real estate folks selling houses. There are no commercial stations on the frequency. Yes, and at Disney World, etc. This is a very doable idea and may well solve FCC/DoD issues. |
#59
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In this case the milliwatts per meter refers to frequencies stated in
meters. Volts per meter only applies to the E component, the magnetic component is always stated in amps per meter. I will get back to you on the specifics. I am pretty sure that my brain is not suffering from a senior moment as to my recollection of the regs. "RST Engineering" wrote in message ... Power is not milliwatts per meter. Power is milliwatts. Field strength (also an allowed measurement) is in volts per meter. |
#60
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On Tue, 4 Oct 2005 17:31:37 -0400, "Fred W4JLE"
wrote: In this case the milliwatts per meter refers to frequencies stated in meters. Hi Fred, Is this to suggest that for 300MHz it is 1mW total input power as say compared to 1MHz allowing 300mW? This would be uncharacteristically generous of the FCC whose regulations would ban emissions from dummy loads. Seems it would hardly serve Ari's search for pork, but I suppose grantsmanship would jump at sending a marathon of runners through the spill area - each carrying sub-Watt handi-talkies to provide the aggregate power, and spectrum, and lung volume necessary to "get the warning out." 73's Richard Clark, KB7QHC |
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