Harvey Hartman has shared the following manual concerning the maintenance of airway beacon facilities. It covers the beacons’ technical characteristics and details maintenance and troubleshooting procedures. Includes great diagrams for beacon geeks!
Aviation Facilities Service Manual of Operations MTC 220.127.116.11
MAINTENANCE OF AIRWAY BEACON FACILITIES
Federal Aviation Agency, Systems Maintenance Division
First Edition, January 1, 1962
Thanks also to Craig Fuller for creating and sharing the PDF!