Type 1231-B amplifier and null detector

Object summary

Title: Type 1231-B amplifier and null detector
Object ID: 1983.070.005
Place made: United States, Massachusetts, Cambridge
Maker: General Radio Company
Object type: Radio equipment
Major collection: Technology
On view: No

Description

Wooden box with a metal top face with several dials and metal terminals on it.

This piece of radio equipment was used as a high-gain amplifier, a null indicator for bridge measurements, and a standing wave indicator for radio signals. This instrument was released in 1948, and sold until about 1962.

Serial No 1173.

Inscriptions

Type: Printed on instrument
Location: front face
Text: Amplifier and Null Detector // Type No. 1231-B Serial no. 1173 // General Radio Co. Cambridge, MASS. U.S.A.

Type: Written on tape
Location: side of instrument
Text: 54-1721

Related items

There is 1 item related to this object.

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Related organizations

General Radio Company

Maker