Crova's apparatus was designed for the purpose of representing vibratory movements on the screen, with 8 disks. Turning the crank past a vertical slit caused the disks to rotate, while a beam of light from the optical system impinged on the slit...
Electronic industries; People; Photographs; San Carlos (Calif.)--History; Technology;
At bottom of black-and-white photographic print: "Radio frequency power for the lunar echo demonstration between Alaska and San Carlos via the moon was generated by this 3K50,000LA Eimac klystron operating at 10,000 watts power output...
