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1409-M: Difference between revisions
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{{GR Product | |||
|model=1409-M | |||
|codes=1409-1409-9713 | |||
|class=Capacitance Standards | |||
|summary=0.02μF,0.05% Standard Capacitor | |||
|image=GR-1409-M-1.jpg | |||
|caption=General Radio 1409-M Standard Capacitor | |||
|series=1409 | |||
|introduced=1956 | |||
|discontinued=1970 | |||
|designers= | |||
|manuals= | |||
* '''Manual Needed.''' | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio General Radio 1409-M Standard Capacitor}} was introduced in {{Catalog U}} and remained available through {{Catalog 1978}}. | |||
The 1409-M 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. | |||
See [[1409]] to view all the capacitors in the series. | |||
==Specifications== | ==Specifications== | ||
* '''Capacitance:''' 0.02 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 430 kHz | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 1409 07_1957.pdf|Experimenter July 1957 describing Type 1409 Series]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 1209 Figure 1.jpg|Change in capacitance as a function of frequency for typical Type 1409 capacitors. | |||
GR 1209 Figure 2.jpg|Dissipation factor as a function of frequency. | |||
GR 1409 Technical Drawing.jpg|Technical Drawing. | |||
GR-1409-M-1.jpg | GR-1409-M-1.jpg | ||
GR 1409 Small Case Left.jpg| Thermometer Access | GR 1409 Small Case Left.jpg| Thermometer Access | ||