1404-A: Difference between revisions
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|codes=1404-9701 | |codes=1404-9701 | ||
|class=capacitance standards | |class=capacitance standards | ||
|summary=Reference Standard Capacitor | |summary=1000pF Reference Standard Capacitor | ||
|image=GR 1404-A Front B.jpg | |image=GR 1404-A Front B.jpg | ||
|caption=General Radio 1404-A Reference Standard Capacitor | |caption=General Radio 1404-A Reference Standard Capacitor | ||
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==Links== | ==Links== | ||
* [[Media:GR Exp 1404 Series 08_1963.pdf|Experimenter | * [[Media:GR Exp 1404 Series 08_1963.pdf|Experimenter August 1963 describing Type 1404 Series]] | ||
==Photos== | ==Photos== | ||
Latest revision as of 10:47, 8 August 2024
The General Radio 1404-A Reference Standard Capacitor were introduced in Catalog R (1963) and remained available through Catalog 1978.
The Type 1404-A capacitor is designed as a primary reference standard of capacitance with which working standards can be compared. The capacitor plates are constructed of Invar and assembled in a sealed container with dry nitrogen under pressure slightly above atmospheric. This type of construction is less affected by external atmospheric conditions and increased stability. Each capacitor is shipped with a calibration certificate with specifications for that particular instrument.
Specifications
- Capacitance: 1000 pF
- Stability: 20 parts per million per year
- Temperature Coefficient of Capacitance: 2 ±2 ppm/°C from -20°C to +65°C.
- Dissipation Factor: less than .00005 at 1 kHz
- Maximum Voltage: 750 volts
- Terminals: two locking GR-874 coaxial connectors
