1422-D

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General Radio 1422-D
Precision Capacitor
General Radio 1422-D Precision Capacitor

Available from 1961 to 1978+

Manuals
  • Manual Needed.
Catalog History
 Document Year Page
Catalog Q 1961 160
Catalog R 1963 149
Catalog S 1965 187
Catalog T 1968 87
Catalog U 1970 112
Catalog73 1973 172
Catalog78 1978 74
(All manuals in PDF format unless noted otherwise)

The General Radio 1422-D Precision Capacitor was introduced in Catalog Q (1961) 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.

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.

Specifications

  • Capacitance Range 35 to 115 pF and 100 to 1150 pF
  • Dial Accuracy: See catalog listings or Experimenter below
  • Maximum Voltage: 1000 V peak

Links

1422 Series
Two-Terminal Three-Terminal
  • 1422-D  − 100-1150 / 35-115 pF
  • 1422-MD − 0-1050 / 0-105 pF ∆
  • 1422-ME − 0-105 / 0-10.5 pF ∆
  • 1422-N  − 100-1150 pF, RF

Photos