Electronic Countermeasures, Research - Development Report Sep51-Apr52 R3 of 3
Wright-Patterson AFB, Dayton, Ohio
Engineer making power measurement on first experimental model of an airborne X-band jammer transmitter. Various components pointed out & working method described. Tuning of frequency shown on spectrum analyzer. Man in parachute in flight test situation. B-25 w/ circularly polarized antenna mounted, followed by F-94 Interceptor. Shown in flight. F-94 locates and tries to attack; B-25 jammer operator sees signal on his scope & turns on jammer and tunes to frequency of interceptor radar. Effect is that attack has to be abandoned. Ground based directive jammer equipment shown (Radar set, SCR-584 & AN/APR-9 type receiver. Man speaks on mic of radio, jammer transmitter tuned. Seen being turned. Operation shown, receiver is turned to the jammer and cancels it out.
Air Force; Spying; Reconnaissance; Aircraft Radiation Laboratory Inventions; 1950s Cold War
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Electronic Countermeasures, Research - Development Report Sep51-Apr52 R3 of 3 Wright-Patterson AFB, Dayton, Ohio Engineer making power measurement on first experimental model of an airborne X-band jammer transmitter. Various components pointed out & working method described. Tuning of frequency shown on spectrum analyzer. Man in parachute in flight test situation. B-25 w/ circularly polarized antenna mounted, followed by F-94 Interceptor. Shown in flight. F-94 locates and tries to attack; B-25 jammer operator sees signal on his scope & turns on jammer and tunes to frequency of interceptor radar. Effect is that attack has to be abandoned. Ground based directive jammer equipment shown (Radar set, SCR-584 & AN/APR-9 type receiver. Man speaks on mic of radio, jammer transmitter tuned. Seen being turned. Operation shown, receiver is turned to the jammer and cancels it out. Air Force; Spying; Reconnaissance; Aircraft Radiation Laboratory Inventions; 1950s Cold War