Altimeter, Type AAU 19A/A, Counter-Pointer, F4 Phantom II, F-100 Super Sabre, F-14 Tomcat

The Type AAU 19A/A Servoed Barometer Altimeter, made by Bendix, was used in the iconic F4 Phantom II and F-100 Super Sabre jet fighters of the US Air Force, Navy, and Marines during the Vietnam War.  It was also later used early versions of the F-14 Tomcat

The AAU 19A/A altimeter is a standard 3 inch counter-drum-pointer altimeter which provides two modes of operation -- servoed (reset) mode and standby mode. In the servoed mode, the altimeter is an electronic repeater of the information received from the CPU-46A altitude computer. The information received by the altimeter has been corrected by the computer for static system error. In the standby mode, the altimeter operates as a normal barometric pressure altimeter. The pilot can select the mode of operation desired by use of the Reset/Stby switch located on the lower right corner of the instrument case.

The counter-drum-pointer altimeter consists of a pressure altimeter combined with an powered servo mechanism. The altitude display is in digitalform, using a 10,000-foot counter, a 1,000-foot counter, and a 100-foot drum. Also, a single pointer shows hundreds of feet on a circular scale.

This altimeter traversed the Sacramento Air Logistics center at McClellan Air Force Base in Nov 1982 (see label).  It is in very nice condition given its age. Measures 3.25 inches square and ~7 inches deep.