Modifications to Sinclair Radio Laboratories model range antenna system type 20 A1

J. Hazell
This system, located in the fourth floor penthouse, Electromagnetic Engineering Section, Radio Division, was originally installed in the spring of 1953. It was built specially for N.R.C. by Sinclair and has performed adequately over the years. A home-built power supply provided the necessary voltages to drive the motors and 16:1 synchro system operating through a converter, drove the Scientific Atlanta recorders, whose synchro systems had ratios of 36:1 and 1:1.
This data repository is not currently reporting usage information. For information on how your repository can submit usage information, please see our documentation.