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Folder, "Aircraft (general) and Aircraft Charter," VP Papers, VP Security Files, Box 3 (Item)
  • may not be too satisfactory for contacts under 1000 mile range. 4. In an attempt to improve the long-range air-ground communications from these C-l4o aircraft, action has been taken to have HF contacts and patch-thru connections made on each flight
Folder, "Military Security Arrangements - Presidential and Vice Presidential," VP Papers, VP Security Files, Box 1 (Item)
  • therefore reooaaend action be taken to change the antenna 878te1Dor otherwise suppress the background noise exiâ– ting in this equipment. b. The control panel for the HF single sideband radio syetem is accessible only to the copilot, and conaequently 1a only