GR type 514 bridge amplifier
Datecirca 1930
Inventory NumberRS0669
ClassificationAmplifier
Subject
Maker
General Radio Company
1915-present
User
Cruft Laboratory, Harvard University
founded 1914
Place of Origin
Dimensions21 x 38 x 32 cm, 15 lb. (8 1/4 x 14 15/16 x 12 5/8 in., 6.8 kg)
DescriptionBridge Amplifier. General Radio Co., Type 514, Ser. # 11, (General Radio-Cruft)
In Collection(s)
Signedetched and white filled on front panel, lower right: BRIDGE AMPLIFIER / TYPE 514 SERIAL NO.11 / GENERAL RADIO CO. / CAMBRIDGE, MASS.
on face of meter: WESTON ELECTRICAL INSTRUMENT CORP., NEWARK, N.J., U.S.A. / VOLTS D.C. / WESTON / MODEL 506 TYPE 611340 / PAT. 1,579,849 1,597,256 1,635,595 1,661,214
Inscribedpainted on face: [open triangle mark]
Historical AttributesCruft
General Radio Company
Date: 1931
Accessories: 5 batteries (removed during FAE inventory): three (3) Burgess #5308, 45 Volt "B" batteries and two (2) Bright Star No. 6, 1 1/2 volts dry cell batteries
Object number: RS0670
General Radio Company
Date: circa 1930
Object number: RS0610
General Radio Company
Date: circa 1930
Object number: RS0609
General Radio Company
Accessories: 3 loose transformers inside mounted on 4-pronged plug.
Object number: RS0341
General Radio Company
Date: circa 1931
Accessories: 9 batteries (removed during FAE inventory - 11/2010).
Object number: WJ0321
Kilbourne & Clark Manufacturing Company
Date: circa 1918
Object number: RS0800
General Radio Company
Date: circa 1948
Object number: RS0293
