precision wavemeter 224
Dateearly 20th Century
Inventory NumberRS0243a
ClassificationWave Meter
Subject
Maker
General Radio Company
1915-present
Cultural Region
Place of Origin
Dimensions21 x 32 x 26 cm (8 1/4 x 12 5/8 x 10 1/4 in.)
Material
DescriptionA General Radio type 224, serial number 113, precision wavemeter mounted in walnut cabinet. The instrument has bakelite front/knobs as well as metal and glass fixtures.
Signedetched and white filled on front panel: PRECISION WAVEMETER / TYPE 224 SERIAL NO. 113 / GENERAL RADIO CO. / CAMBRIDGE, MASS.
on face of meter: WESTON / THERMO-GALVANOMETER / CURRENT SQUARED / RADIO FREQUENCY / RES. = 4.5 OHMS 1 = 115 M.A. / WESTON ELECTRICAL INSTRUMENT CO., NEWARK, N.J. / MODEL 425 NO. 8933
on top condenser on top: VERNIER CONDENSER / TYPE 160 SERIAL NO. 440 / GENERAL RADIO CO. / CAMBRIDGE, MASS.
![precision wavemeter, General Radio model No. 224, Serial No. 113 [?]](/internal/media/dispatcher/44354/postagestamp)
General Radio Company
Date: early 20th Century
Object number: RS0243b
General Radio Company
Date: 1915-1930
Accessories: set of five coils (labelled A - E); tuning variable capacitor
Object number: RS0233
General Radio Company
Date: 1920-1935
Accessories: key tied to handle
Object number: RS0229
General Radio Company
Date: early 20th Century
Accessories: diagrams (3)
Object number: RS0251
General Radio Company
Object number: RS0783
General Radio Company
Date: ca. 1920-1930
Accessories: 6 coils; leather strap; coupler; galvanometer; wooden case; graph (laminated)
Object number: RS0236
General Radio Company
Date: 1920-1935
Accessories: key tied to handle
Object number: RS0235
