Frequency Wavemeter, GE CG-60ABO, for Ships Radar, US Navy Dept of Ships Douglas There are only very few

There are only very few pencil markings on pages

The center knob rotates a flexible shaft connected to a rotatable loop antenna

US Navy AN-5728

this was used in Luftwaffe aircraft such as Ar79

The K-13 Compensating Gunsight

Frequency Wavemeter, GE CG-60ABO, for Ships Radar, US Navy Dept of Ships Douglas There are only very fewThis artifact is a WWII era Frequency Wavemeter Type CG 60ABO made by General Electric for use by the US Navy Dept., Bureau of Ships. "For General Radar Use." The scale on the Slide Bar is graduated from 0 to 150. The slide itself has a red index marker to align with the frequency measurement scale on the Slide Bar. There is a Calibration checklist mounted inside of the felt lined cherry wood case. The thumbscrew on the end of the device loosens,