Triumph US Navy Bureau of Ships Audio Oscillator Model LAJ-2

Triumph US Navy Bureau of Ships Audio Oscillator Model LAJ-2

The Triumph US Navy Bureau of Ships Audio Oscillator Model LAJ-2 is a portable, AC-powered test equipment designed to generate frequencies within the audio spectrum. Manufactured by Triumph Mfg. Co. in Chicago, Illinois, this device is engineered for precision and reliability in various testing environments.

Key Features

• Frequency Range: 20 to 20,000 cycles per second (cps), ensuring comprehensive coverage of the audio spectrum.
• Accuracy: ±2% of dial reading, with a slight variation of ±3% at 20 cps, providing dependable frequency generation.
• Power Output: Delivers 250 milliwatts or 12.2 volts into a 600-ohm load, suitable for a variety of testing applications.
• Attenuation: Adjustable from 0 to 50 decibels (dB) using a 600-ohm “T” pad, allowing for precise control over signal strength.

Design and Construction

The LAJ-2 features a user-friendly interface with a frequency dial calibrated from 20 to 200, complemented by a three-range switch for enhanced versatility. The same dial includes linear divisions from 0 to 100, facilitating accurate adjustments. Output terminals are designed as binding posts, accommodating both wire and banana plug connections for ease of use.

Encased in a durable metal housing with a plastic carrying handle on top, the LAJ-2 is built for portability and resilience. A removable front cover protects the controls and internal components during transport and storage.

Technical Specifications

• Power Input: Operates on 105 to 125 volts, 50 to 60 cycles per second (cps), consuming 45 watts of power.
• Tubes Used: The device utilizes a total of five tubes: two 6AQ5, two 6AU6, and one 6X4, contributing to its reliable performance.

The LAJ-2 is electrically identical to its predecessors, the Navy Models LAJ and LAJ-1, but distinguishes itself with a more compact and lightweight design, enhancing its portability without compromising functionality.

For detailed operational guidelines and maintenance procedures, refer to the Instruction Book for Audio Oscillator Equipment Navy Model LAJ-2 (NAVSHIPS 91143).