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#1
July 3rd 07, 04:29 AM
posted to sci.electronics.basics,rec.radio.amateur.antenna,alt.cellular.cingular,alt.internet.wireless,sci.physics
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How can such a small device -- a wrist watch -- receive suchlong-wave radio signals?
Actually, most likely, the reason these work, is
because you (and most people) live under the Biggest Long-Wave Antenna around (Power lines, telephone cables, TV cables, ect)! And, those that doubt, tell me the range with a lousy antenna, that Jim Creek, and Ect. can be copied! this is around 18 KHz ! Corse, doent hurt to have a massive antenna, and beaucoup power ! BTW, THAT signal is also used to sync generators on the Power Grid (wonder what would happen in a power co got even 1% out of phase? Answer: Meltdown! Jim NN7K DTC wrote: Radium wrote: So I guess it is possible to have analog AM cell phones operating between 40 KHz and 285 KHz that are the same small size as today's cell phones. Right? If it's not possible then why not? If a wrist watch can do it, then why not a cell phone? If a wrist watch can to what? Transmit a signal? They don't, they only receive. |
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#2
July 4th 07, 04:42 PM
posted to sci.electronics.basics,rec.radio.amateur.antenna,alt.cellular.cingular,alt.internet.wireless,sci.physics
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How can such a small device -- a wrist watch -- receivesuchlong-wave radio signals?
Jim - NN7K wrote:
! BTW, THAT signal is also used to sync generators on the Power Grid (wonder what would happen in a power co got even 1% out of phase? Answer: Meltdown! No, if they are trying to run too fast, the current output will increase, and the paower plant's breakers will disconnect it from the grid. If it slows down, it will draw current, and become a motor. The only "meltdown" is the customer's. If too many generators go off line there is a massive brown out, or blackout. -- 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 |
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#3
July 6th 07, 01:26 AM
posted to sci.electronics.basics,rec.radio.amateur.antenna,alt.cellular.cingular,alt.internet.wireless,sci.physics
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How can such a small device -- a wrist watch -- receive suchlong-waveradio signals?
Main thing I getting at, is- the results
won't be good for effeciency, would they?  Jim NN7K Michael A. Terrell wrote: Jim - NN7K wrote: ! BTW, THAT signal is also used to sync generators on the Power Grid (wonder what would happen in a power co got even 1% out of phase? Answer: Meltdown! No, if they are trying to run too fast, the current output will increase, and the paower plant's breakers will disconnect it from the grid. If it slows down, it will draw current, and become a motor. The only "meltdown" is the customer's. If too many generators go off line there is a massive brown out, or blackout. |
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#4
July 6th 07, 02:29 AM
posted to sci.electronics.basics,rec.radio.amateur.antenna,alt.cellular.cingular,alt.internet.wireless,sci.physics
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How can such a small device -- a wrist watch -- receivesuchlong-waveradio signals?
Jim - NN7K wrote:
Main thing I getting at, is- the results won't be good for effeciency, would they? Explain how you would get a 1% speed change in a generator that is already connected to the grid. -- 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 |
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