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722-N: Difference between revisions
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The {{Title|General Radio 722-N Precision Capacitor}} was introduced in {{Catalog K1}} and remained available through {{Catalog P}}. | The {{Title|General Radio 722-N Precision Capacitor}} was introduced in {{Catalog K1}} and remained available through {{Catalog P}}. | ||
The Type 722-N is a laboratory quality precision variable capacitor specifically designed for RF applications. It features low metallic resistance and low inductance, one third that of other 722 standard capacitors. | The Type 722-N is a laboratory quality, precision variable capacitor specifically designed for RF applications. It features low metallic resistance and low inductance, one third that of other 722 standard capacitors. | ||
The set value can be read directly from a drum mounted on the rotor shaft. A correction chart is mounted on the panel for that particular capacitor. | |||
The rotor is mounted on ball bearings in an aluminum casting and driven by a precision worm drive. It is electrically attached to the frame with silver overlay contacts. | |||
The stator is brought out to a separate terminal on the panel beside the rotor terminal attached to the chassis. The rotor terminal is a the same potential as the panel and the copper lined walnut case. | |||
The capacitor is supplied with a fitted wooden carrying case. | |||
==Specifications== | ==Specifications== | ||
* '''Capacitance Range''' 100 to 1100 pF | * '''Capacitance Range:''' 100 to 1100 pF | ||
* '''Dial Accuracy:''' ±1 pF ±0.1% measured at 1 kHz | * '''Dial Accuracy:''' ±1 pF ±0.1% measured at 1 kHz | ||
* '''Maximum Voltage:''' 1000 V peak | * '''Maximum Voltage:''' 1000 V peak | ||
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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== | ||