1620-A
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The General Radio 1620-A Capacitance-Measurement Assembly was introduced in Catalog R (1963) and remained available through Catalog 1978.
The Type 1620-A Capacitance-Measurement Assembly is based on a compilation of Types 1240-A Oscillator/Null Detector and 1615-A Capacitance Bridge into a single unit. Early models were connected physically by bolting their aluminum end frames together. Later models were rack-mounted in a purpose-built cabinet.
Specifications
- See Type 1240-A for Bridge Oscillator and Amplifier/Null Detector specifications
- See Type 1615-A for Capacitance Bridge specifications
Links
- General Radio GR-1620A capacitance ratio bridge @ Fred PA4TIM's site
- GR-1620 operation @ YouTube
- Experimenter August 1962 describing Types 1615-A and 1620-A
- 1240-A Bridge Oscillator-Detector comprising
Photos
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Type 1620-A Late
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Type 1240-A Oscillator and Null Detector
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Type 1615-A Capacitance Bridge
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