1620-A: Difference between revisions
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The {{Title|General Radio 1620-A Capacitance-Measurement Assembly}} was introduced in {{Catalog R}} and remained available through {{Catalog 1978}}. | The {{Title|General Radio 1620-A Capacitance-Measurement Assembly}} was introduced in {{Catalog R}} and remained available through {{Catalog 1978}}. | ||
The Type 1620-A Capacitance-Measurement Assembly is based on a compilation of Types [[1240-A]] | The Type 1620-A Capacitance-Measurement Assembly is based on a compilation of Types [[1240-A|1240-A Oscillator/Null Detector]] and [[1615-A|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== | ==Specifications== | ||
* See Type [[1240-A]] for Bridge Oscillator and Amplifier/Null Detector specifications | * See Type [[1240-A]] for Bridge Oscillator and Amplifier/Null Detector specifications | ||
* See Type [[1615-A]] for Capacitance Bridge specifications | * See Type [[1615-A]] for Capacitance Bridge specifications | ||
==Links== | ==Links== | ||
* [https://www.pa4tim.nl/?p=3398 General Radio GR-1620A capacitance ratio bridge] @ Fred PA4TIM's site | * [https://www.pa4tim.nl/?p=3398 General Radio GR-1620A capacitance ratio bridge] @ Fred PA4TIM's site | ||
* [https://www.youtube.com/watch?v=0HgORsPr01Q GR-1620 operation] @ YouTube | |||
* [[Media:GR Exp 1615-A 1620-A 08_1962.pdf|Experimenter August 1962 describing Types 1615-A and 1620-A]] | * [[Media:GR Exp 1615-A 1620-A 08_1962.pdf|Experimenter August 1962 describing Types 1615-A and 1620-A]] | ||
* [[1240-A|1240-A Bridge Oscillator-Detector]] comprising | * [[1240-A|1240-A Bridge Oscillator-Detector]] comprising | ||
Latest revision as of 04:56, 9 July 2024
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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