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Impedance-Measuring Circuit 821A

Impedance-Measuring Circuit 821A; General Radio (ID = 1244831) Equipment
Impedance-Measuring Circuit 821A; General Radio (ID = 1245270) Equipment Impedance-Measuring Circuit 821A; General Radio (ID = 1245268) Equipment
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Impedance-Measuring Circuit 821A; General Radio (ID = 1245270) Equipment
General Radio: Impedance-Measuring Circuit 821A [Equipment] ID = 1245270 800x600
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For model Impedance-Measuring Circuit 821A, General Radio Company; Cambridge (MA)
Country:  United States of America (USA)
Manufacturer / Brand:  General Radio Company; Cambridge (MA)
alternative name
Year: 1955 Category: Service- or Lab Equipment
Wave bands Wave Bands given in the notes.
Power type and voltage No Power needed
Loudspeaker - - No sound reproduction output.
Power out
from Model: Impedance-Measuring Circuit 821A - General Radio Company;
Material Metal case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 430 x 320 x 220 mm / 16.9 x 12.6 x 8.7 inch
Notes The Twin-T Impedance-Measuring Circuit is a null Instrument for use in measuring inpedance at frequencies from 460 kc to 30 Mc. Measurements can be made at frequencies slightly below and above this nominal frequency range.
Net weight (2.2 lb = 1 kg) 12.9 kg / 28 lb 6.6 oz (28.414 lb)
Price in first year of sale 570.00 $
Source of data -- Original-techn. papers.

Model page created by Alexander Küffer. See "Data change" for further contributors.

All listed radios etc. from General Radio Company; Cambridge (MA)
Here you find 216 models, 197 with images and 84 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.