WWII US Navy NAVSHIPS 900,227(A) OBL-1 Cathode Ray Oscillograph Manual 1945 DuMont

Original World War II U.S. Navy Bureau of Ships Instruction Book for the Cathode-Ray Oscillograph, Navy Model OBL-1. Published as NAVSHIPS 900,227(A) and approved 20 September 1945. Manufactured by Allen B. DuMont Laboratories, Inc. of Passaic, New Jersey, one of the pioneering companies in American electronics and cathode-ray tube development.

The OBL-1 oscillograph was designed as a portable electronic test instrument used by Navy technicians for servicing, calibration, and troubleshooting radar, communications, and other electronic systems during the closing months of World War II and into the early postwar period.

Item Details

• Publication: NAVSHIPS 900,227(A)
• Title: Instruction Book for Cathode-Ray Oscillograph, Navy Model OBL-1
• Equipment: Navy Model OBL-1 Cathode-Ray Oscillograph
• Manufacturer: Allen B. DuMont Laboratories, Inc., Passaic, New Jersey
• Issued By: U.S. Navy Department, Bureau of Ships
• Contract No.: NXsr-33622
• Approval Date: September 20, 1945
• Original WWII/early postwar Bureau of Ships technical manual

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