PHOTOS OF EIGHT OMEGA NAVIGATION STATIONS - WORLD WIDE
![David Jessup > The antenna, rising from the top of the transmitter building, received its power from the transmitter through the antenna matching transformer then one of six variometer coils: And finally through the giant helix coil located directly below the antenna. [ BACK ] . . . . [ NEXT ]Photo by Dr. Ronald Hillstrom.](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-jsxRsMT/8/Ti/Overview%20of%20Building%20Gold-Ti.jpg "David Jessup > The antenna, rising from the top of the transmitter building, received its power from the transmitter through the antenna matching transformer then one of six variometer coils: And finally through the giant helix coil located directly below the antenna. [ BACK ] . . . . [ NEXT ]Photo by Dr. Ronald Hillstrom.")
![David Jessup > Photo taken during Omega station shutdown.Admitedly a poor quality shot, but it does give you an idea of the immensity of the Omega equipment. Note the second man climbing the ladder and the third man kneeling at the top. Circular aluminum spacers and antenna wire can be seen in front of the black crane boom and at bottom right of the photo.. [ BACK ] . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-7VHD76t/8/Ti/Omega%203-Ti.jpg "David Jessup > Photo taken during Omega station shutdown.Admitedly a poor quality shot, but it does give you an idea of the immensity of the Omega equipment. Note the second man climbing the ladder and the third man kneeling at the top. Circular aluminum spacers and antenna wire can be seen in front of the black crane boom and at bottom right of the photo.. [ BACK ] . . . . [ NEXT ]")
![David Jessup > The vertical element's large size is quite apparent. [ BACK ] . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-9cfxxCH/0/Ti/DSC_0020%20Edited-Ti.jpg "David Jessup > The vertical element's large size is quite apparent. [ BACK ] . . . . [ NEXT ]")
![David Jessup > The vertical portion of the antenna consisted of Six 1½ inch multi-strand cables, secured around aluminum rings approximately four feet in diameter. About half way up the antenna bifurcated, creating two legs, each consisting of 3 cables supported by aluminum rings at least two feet in diameter, that continued up to connect to valley spanning cables #2 and #3. While the antenna system consisted of all the components following the transmitter, the vertical element radiated the larger portion of the RF signal. There was no down feed or transmission line in the antenna system. [ BACK ] . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-m3FnBB5/0/Ti/Antenna%20leaving%20bldg-Ti.jpg "David Jessup > The vertical portion of the antenna consisted of Six 1½ inch multi-strand cables, secured around aluminum rings approximately four feet in diameter. About half way up the antenna bifurcated, creating two legs, each consisting of 3 cables supported by aluminum rings at least two feet in diameter, that continued up to connect to valley spanning cables #2 and #3. While the antenna system consisted of all the components following the transmitter, the vertical element radiated the larger portion of the RF signal. There was no down feed or transmission line in the antenna system. [ BACK ] . . . . [ NEXT ]")
![David Jessup > The six valley spans were not the primary radiators of the Omega signal. Their purpose (other than the duty of spans #2 and #3 to support the vertical element of the antenna) was to enable the antenna system to radiate a very long wave radio signal with short antenna elements. The same holds true for the giant helix coil. [ BACK ] . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-7CNXgRd/8/Ti/009%20antenna%20area%20update-Ti.jpg "David Jessup > The six valley spans were not the primary radiators of the Omega signal. Their purpose (other than the duty of spans #2 and #3 to support the vertical element of the antenna) was to enable the antenna system to radiate a very long wave radio signal with short antenna elements. The same holds true for the giant helix coil. [ BACK ] . . . . [ NEXT ]")
![David Jessup > With one exception, the Alternator A-frames were not utilized for the Omega antenna system. A-frame #2 was reused but modified to help support the vertical antenna element. Alternator A-frames #1, #3 and #4 were removed. The new #3, placed halfway between the hoist house and the CCL house, aided #2 in supporting the vertical element. New spans #4, #5 and #6 were added to enlarge the capacity hat. The lowest frequency Omega transmitted (10.2 Khz) had a wave length of 18.27 miles. The physical length of the vertical element of the Omega antenna system was approximately 1/40 that of the transmitted wave length. At 10.2 Khz the vertical element would have needed to be 18.27 miles high to get a 1:1 ratio (or 100% efficiency). As a result of its comparatively short length the Haiku Omega antenna was only 10% efficient. Even this limited result was only possible with the contribution of the valley cables (capacity hat) and the helix coil.
[ BACK ] . . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-j8wwxcV/4/Ti/South%20Anchorages-Ti.jpg "David Jessup > With one exception, the Alternator A-frames were not utilized for the Omega antenna system. A-frame #2 was reused but modified to help support the vertical antenna element. Alternator A-frames #1, #3 and #4 were removed. The new #3, placed halfway between the hoist house and the CCL house, aided #2 in supporting the vertical element. New spans #4, #5 and #6 were added to enlarge the capacity hat. The lowest frequency Omega transmitted (10.2 Khz) had a wave length of 18.27 miles. The physical length of the vertical element of the Omega antenna system was approximately 1/40 that of the transmitted wave length. At 10.2 Khz the vertical element would have needed to be 18.27 miles high to get a 1:1 ratio (or 100% efficiency). As a result of its comparatively short length the Haiku Omega antenna was only 10% efficient. Even this limited result was only possible with the contribution of the valley cables (capacity hat) and the helix coil.
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![David Jessup > VIEW FROM THE SOUTH RIDGE LOOKING NORTH The six valley span cables were electrically connected by cables that drooped in order to minimize horizontal stress on the anchors. The two top ends of the vertical antenna connect to valley spans 3 (on the left) and 2 (on the right). The drooping cables go left to span 4 and right to span 1. NOTE: Use the X3Large "View Size" option to clearly see valley spans 3 & 2 and the drooping cables. (Click on photo to return) Cables with less droop connected spans 4, 5 and 6. The counter weight tower (lower left corner) served as an anchor for the antenna. Its movable counterweight provided stress relief during high wind events and earth quakes. See closeups of the vertical element → Ω [ BACK ] . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-NVJNLPX/11/Ti/IMAG0621_002-Ti.jpg "David Jessup > VIEW FROM THE SOUTH RIDGE LOOKING NORTH The six valley span cables were electrically connected by cables that drooped in order to minimize horizontal stress on the anchors. The two top ends of the vertical antenna connect to valley spans 3 (on the left) and 2 (on the right). The drooping cables go left to span 4 and right to span 1. NOTE: Use the X3Large \"View Size\" option to clearly see valley spans 3 & 2 and the drooping cables. (Click on photo to return) Cables with less droop connected spans 4, 5 and 6. The counter weight tower (lower left corner) served as an anchor for the antenna. Its movable counterweight provided stress relief during high wind events and earth quakes. See closeups of the vertical element → Ω [ BACK ] . . . . [ NEXT ]")
![David Jessup > Antenna counter weight tower - Two views1.) Cable from the antenna is coming in from left to right to the pulley at the base of the tower (Red Circle). The cable then follows the white arrow to the top of the tower. Next the cable goes down to the counter weight pulley and back up to be secured at the top of the tower.2.) Ladder running to the top of the tower.3.) Counterweight rails. . [ BACK ] . . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-X9dPMBN/6/Ti/counterweight%20tower%20merge-Ti.jpg "David Jessup > Antenna counter weight tower - Two views1.) Cable from the antenna is coming in from left to right to the pulley at the base of the tower (Red Circle). The cable then follows the white arrow to the top of the tower. Next the cable goes down to the counter weight pulley and back up to be secured at the top of the tower.2.) Ladder running to the top of the tower.3.) Counterweight rails. . [ BACK ] . . . . . [ NEXT ]")
![David Jessup > The twelve huge anchors supporting the six valley spanning cables easily handled the downward stress of many tons. They were NOT designed to handle excessive lateral stress. In addition to stress from wind, more lateral stress existed due to the electrical interconnections between all valley spans. The two cables supporting the vertical element weighed about 12½ tons. Upon adding the weight of the other four spans, it becomes apparent that a massive amount of weight needed to be controlled! The counterweight tower also helped suppress lateral movement. [ BACK ] . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-MKMTw4N/4/Ti/1014Gold-Ti.jpg "David Jessup > The twelve huge anchors supporting the six valley spanning cables easily handled the downward stress of many tons. They were NOT designed to handle excessive lateral stress. In addition to stress from wind, more lateral stress existed due to the electrical interconnections between all valley spans. The two cables supporting the vertical element weighed about 12½ tons. Upon adding the weight of the other four spans, it becomes apparent that a massive amount of weight needed to be controlled! The counterweight tower also helped suppress lateral movement. [ BACK ] . . . . [ NEXT ]")
![David Jessup > CLOSING DOWN THE HAIKU OMEGA STATIONSeptember 30, 1997 0300z or September 29, 1997 1700 local time [ BACK ] . . . . [ NEXT ]](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-Rqdq6rk/5/Ti/DSC_0024-Ti.jpg "David Jessup > CLOSING DOWN THE HAIKU OMEGA STATIONSeptember 30, 1997 0300z or September 29, 1997 1700 local time [ BACK ] . . . . [ NEXT ]")
The antenna, rising from the top of the transmitter building, received its power from the transmitter through the antenna matching transformer then one of six variometer coils: And finally through the giant helix coil located directly below the antenna. [ BACK ] . . . . [ NEXT ]
Photo by Dr. Ronald Hillstrom.
Photo by Dr. Ronald Hillstrom.
![David Jessup > The antenna, rising from the top of the transmitter building, received its power from the transmitter through the antenna matching transformer then one of six variometer coils: And finally through the giant helix coil located directly below the antenna. [ BACK ] . . . . [ NEXT ]Photo by Dr. Ronald Hillstrom.](http://www.haikuvalley.com/History/OMEGA-NAVIGATION-SYSTEM/i-jsxRsMT/8/M/Overview%20of%20Building%20Gold-M.jpg "David Jessup > The antenna, rising from the top of the transmitter building, received its power from the transmitter through the antenna matching transformer then one of six variometer coils: And finally through the giant helix coil located directly below the antenna. [ BACK ] . . . . [ NEXT ]Photo by Dr. Ronald Hillstrom.")
The antenna, rising from the top of the transmitter building, received its power from the transmitter through the antenna matching transformer then one of six variometer coils: And finally through the giant helix coil located directly below the antenna. [ BACK ] . . . . [ NEXT ]
Photo by Dr. Ronald Hillstrom.
Photo by Dr. Ronald Hillstrom.
