GE type 1231-B amplifier and null detector
Date: circa 1948
Inventory Number: RS0293
Classification: Amplifier
Subject:
Maker: General Radio Company (1915-present)
User: Division of Engineering and Applied Sciences, Harvard University (1946 - 2007)
Place of Origin:
Dimensions:
18 x 4 x 17 cm (7 1/16 x 1 9/16 x 6 11/16 in.)
Description:
Amplifier and Null Detector, General Radio, Type 1231-B, Serial #1119
In Collection(s)
Signedetched and white filled on front panel: AMPLIFIER / AND NULL DETECTOR / TYPE NO. 1231-B SERIAL NO. 1119 / (GR logo) / GENERAL RADIO CO. / CAMBEIDGE (registered mark) MASS. U.S.A.
on face of meter: GENERAL RADIO CO. / M'F'D BY WESTON / MODEL 891 G.R. MEDS 36
plate on power supply: POWER / SUPPLY / TYPE 1261-A SER. NO. 1676 / GENERAL RADIO CO. / CAMBRIDGE, MASS., U.S.A.
on face of meter: GENERAL RADIO CO. / M'F'D BY WESTON / MODEL 891 G.R. MEDS 36
plate on power supply: POWER / SUPPLY / TYPE 1261-A SER. NO. 1676 / GENERAL RADIO CO. / CAMBRIDGE, MASS., U.S.A.
Inscribedplate on front panel with raised lettering: AF8053-498
painted on front panel: ENGINEERING DIVISION E.P.D. / INVENTORY NUMBER / 16118
stamped on back: TYPE 1231-P6 / GENERAL RADIO CO.
painted on front panel: ENGINEERING DIVISION E.P.D. / INVENTORY NUMBER / 16118
stamped on back: TYPE 1231-P6 / GENERAL RADIO CO.