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Impedance Bridge 1650-A

Impedance Bridge 1650-A; General Radio (ID = 304962) Equipment
Impedance Bridge 1650-A; General Radio (ID = 304963) Equipment
Impedance Bridge 1650-A; General Radio (ID = 303025) Equipment Impedance Bridge 1650-A; General Radio (ID = 2591927) Equipment
Impedance Bridge 1650-A; General Radio (ID = 2591928) Equipment
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Impedance Bridge 1650-A; General Radio (ID = 303025) Equipment
General Radio: Impedance Bridge 1650-A [Equipment] ID = 303025 830x700
Select picture or schematic to display from thumbnails on the right and click for download.
For model Impedance Bridge 1650-A, General Radio Company; Cambridge (MA):
View of the bridge with tilt cover open.
Country:  United States of America (USA)
Manufacturer / Brand:  General Radio Company; Cambridge (MA)
alternative name
Year: 1959 ? Category: Service- or Lab Equipment
Semiconductors (the count is only for transistors) 4:
Wave bands - without
Power type and voltage Storage and/or dry batteries / 4 × 1,5 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Model: Impedance Bridge 1650-A - General Radio Company;
Material Metal case
Shape Portable set > 8 inch (also usable without mains)
Dimensions (WHD) 325 x 320 x 200 mm / 12.8 x 12.6 x 7.9 inch

The 1650-A Impedance Bridge was a versatile and compact instrument capable of accurate measurements of resistance, capacitance, inductance, dissipation and quality factor over a very wide range: 1 milliohm to 11 megaohm for resistance, 1 picofarad to 1100 microfard for capacitance and 1 microhenry to 1100 Henry for inductance. Accuracy better than 1% was given for R, C and L. The 1650-A used custom made precision components for the arms of the bridge: the CRL rheostat used a mechanical justifying mechanism with eight linearizing cams; a silvered mica, high precision capacitor was used as standard capacitor. The Orthonull device, with non reciprocal ganging of CRL and D dials, was available for easy of balance convergence in cases of low Q or high D.
Virtually any impedance measurement could be done with this instruments, also relying upon the operating procedures given in its instruction manual.

Price 440 USD

Net weight (2.2 lb = 1 kg) 8.5 kg / 18 lb 11.6 oz (18.722 lb)
Price in first year of sale 678.00 DM
Source of data - - Data from my own collection
Mentioned in - - Manufacturers Literature

Model page created by Emilio Ciardiello. 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.