WWII US Navy OBN Transmitter Monitor Oscilloscope Manual NAVSHIPS 900429 1945

Original World War II U.S. Navy Bureau of Ships instruction book for the Transmitter Monitor Oscilloscope, Navy Model OBN, manufactured by Allen B. Du Mont Laboratories, Inc.

Published as NAVSHIPS 900,429 and approved May 21, 1945, this technical manual covers the description, installation, adjustment, operation, and maintenance of the OBN transmitter-monitoring oscilloscope. The contents include pulse-shape interpretation, frequency-drift monitoring, crystal oscillator circuits, sweep controls, voltage regulation, installation procedures, and connections to Navy transmitter equipment.

The manual retains its original screw-post binder. The former “Confidential—Non-Registered” classification is crossed out and accompanied by handwritten declassification markings, adding historical interest.

Details

• Title: Instruction Book for Transmitter Monitor Oscilloscope Navy Model OBN
• Publication: NAVSHIPS 900,429
• Branch: U.S. Navy, Bureau of Ships
• Manufacturer: Allen B. Du Mont Laboratories, Inc., Passaic, New Jersey
• Contract: NXsr 37599
• Approval date: May 21, 1945
• Era: World War II
• Binding: Original screw-post technical-manual binder
• Former classification: Confidential, Non-Registered; visibly canceled/declassified

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