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. Its direct reading from a drum mounted on the rotor shaft. The rotor is mounted on ball bearings in a aluminum casting driven by a precision worm drive. The rotor 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 copper lined walnut case. A correction chart is mounted on the panel for that particular capacitor. The capacitor is supplied with fitted wooden carrying case. | 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. Its direct reading from a drum mounted on the rotor shaft. The rotor is mounted on ball bearings in a aluminum casting driven by a precision worm drive. The rotor 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 copper lined walnut case. A correction chart is mounted on the panel for that particular capacitor. The capacitor is supplied with a fitted wooden carrying case. | ||
==Specifications== | ==Specifications== | ||
Revision as of 07:46, 22 April 2024
The General Radio 722-N Precision Capacitor was introduced in Catalog K1 (1939) and remained available through Catalog P (1959).
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. Its direct reading from a drum mounted on the rotor shaft. The rotor is mounted on ball bearings in a aluminum casting driven by a precision worm drive. The rotor 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 copper lined walnut case. A correction chart is mounted on the panel for that particular capacitor. The capacitor is supplied with a fitted wooden carrying case.
Specifications
- Capacitance Range 100 to 1100 pF
- Dial Accuracy: ±1 pF ±0.1% measured at 1 kHz
- Maximum Voltage: 1000 V peak
Links
- Experimenter describing Types 722 February 1937
- Experimenter describing Types 722 January 1938
- Experimenter describing Types 722 October 1938
Photos
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Carrying Case
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Carrying Case
