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RE: U-Boat Histories Books
Posted by: Werner Frank ()
Date: March 25, 2001 04:09PM

<HTML>Thanks again for the radio information. I searched the net in various ways - more to try - to find something specific on the radio models described. I wouldn\'t think that these were used only in Uboots, so some info should be available. If I can find specs or pictures I\'ll let you know. Did you notice that the very low frequency transmitter (for underwater reception by subs) was 1,000 kw (1,000,000 watts). Usually only large TV (6 mhz wide signals) transmitters are in that range. The strongest AM radio stations in U.S. are 50KW. Also, the antenna system must of been huge in view of very low frequency (long wave length). At 100 khz a quarter wave vertical would be 750 meters high. This extreme was overcome by various artifical means of physically shortening the antenna while using loading coils and capacitive \"hats\" to maintain the \"electrical length\" (like the coiled cell-phone antennas on cars). </HTML>

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Subject Written By Posted
U-Boat Histories Books Woody 03/23/2001 02:43PM
RE: U-Boat Histories Books James stewart 03/23/2001 08:35PM
RE: U-Boat Histories Books Ricky.S 03/23/2001 09:01PM
RE: U-Boat Histories Books Lawrence 03/24/2001 02:28PM
RE: U-Boat Histories Books Ted Agar 03/24/2001 09:24PM
RE: U-Boat Histories Books Ken Dunn 03/24/2001 09:49PM
RE: U-Boat Histories Books Werner Frank 03/25/2001 04:09PM
RE: U-Boat Histories Books Jeff 03/25/2001 03:27AM
RE: U-Boat Histories Books Woody 03/25/2001 07:54PM


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