WWII US Navy OBN Transmitter Monitor Oscilloscope Manual NAVSHIPS 900429 1945 T-shirts 92×57mm Mauser caliber

92×57mm Mauser caliber

Case: Original hard clamshell case

Shows heavy age wear

Title: Spectrum Analyzer TS-148/UP

4 MK II Spike Bayonet

WWII US Navy OBN Transmitter Monitor Oscilloscope Manual NAVSHIPS 900429 1945 T-shirts 92×57mm Mauser caliberOriginal 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