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1422-D: Difference between revisions
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The {{Title|General Radio 1422-D Precision Capacitor}} was introduced in {{Catalog Q}} and remained available through {{Catalog 1978}}. | The {{Title|General Radio 1422-D Precision Capacitor}} was introduced in {{Catalog Q}} and remained available through {{Catalog 1978}}. | ||
The Type 1422-D is a laboratory quality, precision variable capacitor specifically designed for audio frequency applications, an updated design of the [[722-D]] with an aluminum case and redesigned frequency control knob | The Type 1422-D is a laboratory quality, precision variable capacitor specifically designed for audio frequency applications, an updated design of the [[722-D]] with an aluminum case and redesigned frequency control knob. | ||
The set value can be read directly from a drum mounted on the rotor shaft. A correction chart is mounted on the panel | It features two ranges, 35 to 115 pF and 100 to 1150 pF, with connections using Type [[938-A]] Jack-Top binding posts plus a ground terminal with a shorting link. | ||
The set value can be read directly from a drum mounted on the rotor shaft. A correction chart specific to that particular capacitor is mounted on the panel. | |||
The rotor is mounted on preloaded ball bearings in an aluminum casting, driven by a precision worm drive. | The rotor is mounted on preloaded ball bearings in an aluminum casting, driven by a precision worm drive. | ||