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1656: Difference between revisions
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The '''General Radio 1656 Impedance Bridge''' was introduced in 1970 Catalog U and remained available through Catalog 1978. | The '''General Radio 1656 Impedance Bridge''' was introduced in 1970 Catalog U and remained available through Catalog 1978. | ||
It is last in a long line of manual impedance bridges starting with [[650-A]] in 1933. | |||
The 1656 features a built-in generator and detector, with side-panel connections for external ones. | |||
The new CRL device that displays results in a digital format was a collaboration between Oak Manufacturing and General Radio. | |||
The DQ dial is of the conventional design. | |||
The 1656 is powered by five D-cells – four for the generator/AC detector, and one for the DC detector. Both batteries can be checked by the front panel function switch. | |||
==Specifications== | ==Specifications== | ||
* '''Ranges:''' | * '''Ranges:''' | ||
* '''Capacitance:''' 0.1 pF to 1100 μF | * '''Capacitance:''' 0.1 pF to 1100 μF, series or parallel, 7 ranges | ||
* '''Inductance:''' | * '''Inductance:''' 0.1 μH to 1100 H, series or parallel, 7 ranges | ||
* '''Resistance:''' 0.1 mΩ to 1.1 MΩ | * '''Resistance:''' 0.1 mΩ to 1.1 MΩ, AC or DC, 7 ranges | ||
* '''Conductance:''' 0.1 | * '''Conductance:''' 0.1 nS to 1.1 S, AC or DC, 7 ranges | ||
* '''Basic Accuracy:''' .1% | * '''Basic Accuracy:''' 0.1% (see manual) | ||
* '''Generator:''' Internal, 1 kHz ±2% ac, 1.5 V | * '''Generator:''' Internal, 1 kHz ±2% ac, 1.5 V DC; External, 20 Hz to 20 kHz AC | ||
==Links== | ==Links== | ||
* [[Media:GR Exp 1656 03_1970.pdf|Experimenter describing Type 1656 March 1970]] | * [[Media:GR Exp 1656 03_1970.pdf|Experimenter describing Type 1656 March 1970]] | ||