722-N: Difference between revisions

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(Created page with "Type '''722-N Precision Variable Capacitor (RF Frequencies)'''. ==Specifications== ==Links== ==Photos== <gallery> </gallery> Category:Capacitance Standards")
 
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Type '''722-N Precision Variable Capacitor (RF Frequencies)'''.
{{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]]
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