1620-A

The General Radio 1620-A Capacitance-Measurement Assembly was introduced in Catalog R (1963) and remained available through Catalog 1978.

General Radio 1620-A

Capacitance-Measurement Assembly

Available from 1963 to 1978+

Manuals

General Radio 1620-A Capacitance-Measurement Assembly Manual 1615-0100-A 1963

Catalog History

Document	Year	Page
Catalog R	1963	37
Catalog S	1965	59
Catalog T	1968	80
Catalog U	1970	88
Catalog73	1973	160
Catalog78	1978	47

(All manuals in PDF format unless noted otherwise)

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
- 1232-A Null Detector
- 1311-A Bridge Oscillator

Photos

Type 1620-A Late
Type 1240-A Oscillator and Null Detector
Type 1615-A Capacitance Bridge