1409-K: Difference between revisions
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The {{Title|General Radio General Radio 1409-K Standard Capacitor}} was introduced in {{Catalog O}} and remained available through {{Catalog U}}. | The {{Title|General Radio General Radio 1409-K Standard Capacitor}} was introduced in {{Catalog O}} and remained available through {{Catalog U}}. | ||
The 1409-K is a fixed mica capacitor of very high stability for use as two or three-terminal capacitance standards in the laboratory. The capacitor is installed in an aluminum case along with Silica gel desiccant then sealed with hi-temp potting wax. A well located on the right side of the case for the insertion of a dial-type thermometer. Three jack-top binding posts are provided on the top of the case and removable plugs on the bottom, for convenient parallel connection without error. Each capacitor is supplied with a certificate of calibration giving two and three terminal measured capacitance. | The 1409-K is a fixed mica capacitor of very high stability for use as two or three-terminal capacitance standards in the laboratory. The capacitor is installed in an aluminum case along with Silica gel desiccant then sealed with hi-temp potting wax. A well located on the right side of the case for the insertion of a dial-type thermometer. Three jack-top binding posts are provided on the top of the case and removable plugs on the bottom, for convenient parallel connection without error. Each capacitor is supplied with a certificate of calibration giving two and three terminal measured capacitance. The Type 1409-K capacitor is mounted in the small case. | ||
See [[1409]] to view all the capacitors in the series. | See [[1409]] to view all the capacitors in the series. | ||
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* '''Stability:''' Capacitance change is less than 0.01% per year | * '''Stability:''' Capacitance change is less than 0.01% per year | ||
* '''Temperature Coefficient:''' capacitance; +35 ± 10 ppm per degree between 10 °C and 70 °C | * '''Temperature Coefficient:''' capacitance; +35 ± 10 ppm per degree between 10 °C and 70 °C | ||
* '''Dissipation Factor:''' Less than 0.0003 at 1 kHz and 23 °C (see curves). Measured dissipation factor at 1 kHz is stated in the | * '''Dissipation Factor:''' Less than 0.0003 at 1 kHz and 23 °C (see curves). Measured dissipation factor at 1 kHz is stated in the certificate to an accuracy of ±0.00005 | ||
certificate to an accuracy of ±0.00005 | |||
* '''Leakage Resistance:''' 5000 ohm-farads or 100 GΩ, whichever is the lesser | * '''Leakage Resistance:''' 5000 ohm-farads or 100 GΩ, whichever is the lesser | ||
* '''Maximum Voltage:''' 500 V peak below 1.3 MHz | * '''Maximum Voltage:''' 500 V peak below 1.3 MHz | ||
Latest revision as of 04:37, 21 June 2024
The General Radio General Radio 1409-K Standard Capacitor was introduced in Catalog O (1956) and remained available through Catalog U (1970).
The 1409-K is a fixed mica capacitor of very high stability for use as two or three-terminal capacitance standards in the laboratory. The capacitor is installed in an aluminum case along with Silica gel desiccant then sealed with hi-temp potting wax. A well located on the right side of the case for the insertion of a dial-type thermometer. Three jack-top binding posts are provided on the top of the case and removable plugs on the bottom, for convenient parallel connection without error. Each capacitor is supplied with a certificate of calibration giving two and three terminal measured capacitance. The Type 1409-K capacitor is mounted in the small case.
See 1409 to view all the capacitors in the series.
Specifications
- Capacitance: 0.005 μF
- Series Inductance: 0.050 μH
- Adjustment Accuracy: within ±0.05%
- Stability: Capacitance change is less than 0.01% per year
- Temperature Coefficient: capacitance; +35 ± 10 ppm per degree between 10 °C and 70 °C
- Dissipation Factor: Less than 0.0003 at 1 kHz and 23 °C (see curves). Measured dissipation factor at 1 kHz is stated in the certificate to an accuracy of ±0.00005
- Leakage Resistance: 5000 ohm-farads or 100 GΩ, whichever is the lesser
- Maximum Voltage: 500 V peak below 1.3 MHz
Links
Photos
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Change in capacitance as a function of frequency for typical Type 1409 capacitors.
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Dissipation factor as a function of frequency.
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Technical Drawing.
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Thermometer Access
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