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#1
June 22nd 11, 05:20 PM
posted to rec.radio.shortwave
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RADIO-WAVES do travel through empty space, as defined bymains...
Certain Radio Frequencies travel through the Earth too.U.S.Navy has, or
used to have, such a system.I read about that in one of my Popular Science snail mail magazines back in the 1960s.I also snail subscribe to Popular Mechanics magazine, maybe that article I read was in one of my 1960s Popular Mechanics magazines.That was a million years ago, so I don't exactly remember which magazine it was in. cuhulin, mit dur foggy memory |
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#2
June 23rd 11, 07:43 AM
posted to rec.radio.shortwave
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RADIO-WAVES do travel through empty space, as defined by mains...
On Jun 22, 12:20*pm, wrote:
Certain Radio Frequencies travel through the Earth too.U.S.Navy has, or used to have, such a system.I read about that in one of my Popular Science snail mail magazines back in the 1960s.I also snail subscribe to Popular Mechanics magazine, maybe that article I read was in one of my 1960s Popular Mechanics magazines.That was a million years ago, so I don't exactly remember which magazine it was in. cuhulin, mit dur foggy memory * Was that similar to telluric currents or some other phenomenon ? Ah- hah! Must be ground penetrating waves !!! |
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