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722-D: Difference between revisions
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{{GR Product | {{GR Product | ||
|model=722-D | |model=722-D | ||
|codes=CRUEL,CRUELQUATZ | |||
|class=capacitance standards | |class=capacitance standards | ||
|summary=Precision Capacitor | |summary=Precision Capacitor | ||
| Line 15: | Line 16: | ||
The {{Title|General Radio 722-D Precision Capacitor}} was introduced in {{Catalog J}} and remained available through {{Catalog P}}. | The {{Title|General Radio 722-D Precision Capacitor}} was introduced in {{Catalog J}} and remained available through {{Catalog P}}. | ||
The Type 722-D is a laboratory quality dual section precision variable capacitor. | The Type 722-D is a laboratory quality, dual section, precision variable capacitor. The capacitor is supplied with a wooden carrying case fitted. | ||
A direct reading of both sections is obtained from a drum mounted on the rotor shaft. | |||
The rotor is mounted on ball bearings in an aluminum casting driven by a precision worm drive, and is electrically attached to the frame with silver overlay contacts. | |||
The two stators are brought out to separate terminals on the panel with the shared rotor terminal. The rotor terminal is a the same potential as the panel and copper-lined walnut case. | |||
A correction chart is mounted on the panel for that particular capacitor. | |||
==Specifications== | ==Specifications== | ||
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==Links== | ==Links== | ||
* [[Media:GR Exp 722-D 02_1937.pdf|Experimenter describing Types 722 | * [[Media:GR Exp 722-D 02_1937.pdf|Experimenter February 1937 describing Types 722]] | ||
* [[Media:GR Exp 722 01-1938.pdf|Experimenter describing Types 722 | * [[Media:GR Exp 722 01-1938.pdf|Experimenter January 1938 describing Types 722]] | ||
* [[Media:GR Exp 722 10_1938.pdf|Experimenter describing Types 722 | * [[Media:GR Exp 722 10_1938.pdf|Experimenter October 1938 describing Types 722]] | ||
==Photos== | ==Photos== | ||