722-N: Difference between revisions
(Created page with "Type '''722-N Precision Variable Capacitor (RF Frequencies)'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Capacitance Standards") |
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{{GR Product | |||
|model=722-N | |||
|class=capacitance standards | |||
|summary=Precision Capacitor | |||
|image=GR 722-N Close-up.jpg | |||
|caption=General Radio 722-N Precision Capacitor | |||
|series=722 | |||
|introduced=1939 | |||
|discontinued=1959 | |||
|designers= | |||
|manuals= | |||
* '''Manual Needed''' | |||
{{Catalog History}} | |||
}} | |||
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. | |||
==Specifications== | ==Specifications== | ||
* '''Capacitance Range''' 100 to 1100 pF | |||
* '''Dial Accuracy:''' ±1 pF ±0.1% measured at 1 kHz | |||
* '''Maximum Voltage:''' 1000 V peak | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 722-D 02_1937.pdf|Experimenter describing Types 722 February 1937]] | |||
* [[Media:GR Exp 722 01-1938.pdf|Experimenter describing Types 722 January 1938]] | |||
* [[Media:GR Exp 722 10_1938.pdf|Experimenter describing Types 722 October 1938]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 722-N Front.jpg | |||
GR 722-N Side View.jpg | |||
GR 722-N Top View.jpg | |||
GR 722-N Bottom.jpg | |||
GR 722-N Case Inside.jpg | |||
GR 722-N Inside Bottom.jpg | |||
GR 722-N Inside Rear.jpg | |||
GR 722-N Inside Top.jpg | |||
GR 722-N Interior Left.jpg | |||
GR 722-N Interior Right.jpg | |||
GR 722-N Interior.jpg | |||
GR 722 Carrying Case Front.jpg|Carrying Case | |||
GR 722 Carrying Case Inside.jpg|Carrying Case | |||
</gallery> | </gallery> | ||
[[Category:Capacitance Standards]] | [[Category:Capacitance Standards]] | ||
Revision as of 06:59, 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 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
