1603-A: Difference between revisions
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The '''General Radio 1603-A''' is a Z-Y impedance bridge [[introduced in 1956]] Catalog O and remained available through Catalog T 1968. | The '''General Radio 1603-A''' is a Z-Y impedance bridge [[introduced in 1956]] Catalog O and remained available through Catalog T 1968. | ||
Known as ''the bridge that always has an answer'', its claim to fame is that it can be balanced for any impedance connected to its terminals. The 1603-A is accurate at audio frequencies from 20 Hz to 20 kHz. It requires an audio oscillator and detector for operation. | |||
The 1603-A directly measures the quadrature components of a complex impedance Z = R + jX, or a complex admittance Y = G + jB. The unknown Z or Y may lie in any of the four quadrants of the complex plane, since this bridge can measure both positive and negative values of R and G as well as X and B. | |||
==Specifications== | ==Specifications== | ||
* '''Frequency Range:''' 20 Hz to 20 kHz | * '''Frequency Range:''' 20 Hz to 20 kHz | ||
* '''Impedance and Admittance:''' -infinity to +infinity | * '''Impedance and Admittance:''' -infinity to +infinity | ||
* '''Accuracy (with unknown grounded):''' 1% (see manual) | * '''Accuracy (with unknown grounded):''' 1% (see manual) | ||
==Links== | ==Links== | ||
* [[Media:GRwiki Exp 1603-A 07_1955.pdf|Experimenter describing 1603-A | * [[Media:GRwiki Exp 1603-A 07_1955.pdf|GR Experimenter July 1955 describing the 1603-A]] | ||
==Photos== | ==Photos== | ||
Revision as of 04:25, 2 April 2024
The General Radio 1603-A is a Z-Y impedance bridge introduced in 1956 Catalog O and remained available through Catalog T 1968.
Known as the bridge that always has an answer, its claim to fame is that it can be balanced for any impedance connected to its terminals. The 1603-A is accurate at audio frequencies from 20 Hz to 20 kHz. It requires an audio oscillator and detector for operation.
The 1603-A directly measures the quadrature components of a complex impedance Z = R + jX, or a complex admittance Y = G + jB. The unknown Z or Y may lie in any of the four quadrants of the complex plane, since this bridge can measure both positive and negative values of R and G as well as X and B.
Specifications
- Frequency Range: 20 Hz to 20 kHz
- Impedance and Admittance: -infinity to +infinity
- Accuracy (with unknown grounded): 1% (see manual)
