1422-D

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

• Experimenter August 1961 describing Type 1422 Series

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	1422-CB − 50-1100 pF 1422-CC − 5-110 pF 1422-CD − 0.5-11 / 0.05-1.1 pF

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