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Old March 13th, 2006, 06:36 PM   #1
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Transmission facilities without radio masts/towers

One think, that each transmission facility requires at least one radio mast or radio tower. But there were (and are) some radio facilities for VLF, which used an antenna span over a fjord. One such facility was Haiku VLF transmitter, used until 1997 for OMEGA transmission on Hawaii ( http://www.friendsofhaikustairs.org/Final%20Report.htm ), an other one was the OMEGA transmitter at Bratland Norway, which used a wire spun over a fjord (close to it, there is the still active JXN VLF transmitter using a similiar antenna).
An other transmitter using an antenna spun between two hills is Tavolara transmitter, Sardegna, Italy.
There may be perhaps further radio stations using antenna spans between hills, however information and pictures are barely available, because these stations are all operated by military offices.
An other radio station without antenna towers are the ELF transmitters of the US Navy ( http://www.fas.org/nuke/guide/usa/c3...ke_elf2003.pdf ). They use the whole earth as antenna! To do this the output current of the transmitter is fed into the earth by two electrodes approximately 50 kilometres away from each other. The powerline you can see on http://www.fas.org/nuke/guide/usa/c3...ke_elf2003.pdf is not as described there an antenna. It is just the feeding line running from the ground to the ground electrodes. The antenna is the earth!
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