Oscilloscope, Radar, APS-4, Airborne pulse analyzer

Display Status:

This object is not on display at the National Air and Space Museum. It is either on loan or in storage.

Collection Item Summary:

A simplified display system was fitted to the AN/APS-4 to produce the "AN/APS-6", also known as the "AIA-1". The new display, which was only about 5 centimeters (2 inches) in diameter, effectively made the AN/APS-6 a "radar gunsight", allowing a fighter pilot to use the radar himself without need for a radar operator. The pilot wore red-tinted goggles to allow him to retain his night vision. The APS-6 was simple to operate (only six knobs), had a range of five miles, and weighed 250 pounds. It featured a double-dot system that displayed a shadow blip to the right of the true blip; this secondary blip showed the target's altitude relative to the aircraft. Intercept Radar (development of US Navy AIA radar); manufactured by Sperry; used in P-38M, F2H-2N, F-82D, F6F-3N/5N, F7F-4N, F8F-1N/2N, F4U-4N/5N; tested in SNB-1. SCR-537

9375 MHz, 40 kW, 1944. Major components:

CS-66ABV Antenna

CS-52ACL Transmitter

CS-46ABG Receiver

CS-52AAZ Indicator-amplifier

CS-62AAQ Junction box

CS-55AAW Indicator

CS-23ACA Control box