1955 Preliminary Instruction Book for Radar Test Set AN/UPM-66 – Motorola Defense Division DTG Original World War I era

Original World War I era U

such as their sink rate

wide Brodie-style shell

Signal Corps BC-622-A Relay Unit

1955 Preliminary Instruction Book for Radar Test Set AN/UPM-66 – Motorola Defense Division DTG Original World War I eraOriginal U. S. military Preliminary Instruction Book for the AN UPM 66 Radar Test Set, dated September 1, 1955, with included May 15, 1957 addenda sheet. Manufactured by Motorola Incorporated, National Defense Division, under Air Force contract for the Laboratory for Electronics. The AN UPM 66 was a specialized radar maintenance and calibration instrument used for testing, troubleshooting, and servicing airborne and ground based radar systems during