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| Re: Cell Phone not invented 106 years ago (320275) | |||
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Re: Cell Phone not invented 106 years ago |
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Posted by SelkirkTMO on Wed May 21 22:45:00 2008, in response to Re: Cell Phone not invented 106 years ago, posted by Olog-hai on Wed May 21 22:26:05 2008. Nope ... no "radio" at all ... electromagnetic, yes ... think of this arrangement as being an audio transformer which consists of two sets of windings on an iron core like any other transformer. Now take the windings off the core and separate them from each other by a distance. It'll still work, but there will be very large losses because the coupling of near distance is no more. Add an amplifier to the "receiving coil" to boost up the signal, and there you are. No modulation, no carrier, just two windings talking to each other like an ordinary telephone by means of "mutual inductance" ... that's all it took. |
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