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General Radio 980-C
Decade Capacitor Unit
General Radio 980-C Decade Capacitor Unit

Available from 1956 to 1965

  • Manual Needed.
Catalog History
 Document Year Page
Catalog O 1956 158
Catalog P 1959 172
Catalog Q 1961 167
Catalog R 1963 157
Catalog S 1965 197
(All manuals in PDF format unless noted otherwise)

The General Radio 980-C Decade Capacitor Unit was introduced in Catalog O (1956) and remained available through Catalog S (1965).

The Type 980-C is a decade capacitance unit comprising four polystyrene capacitors sealed in a brass tub. The capacitor values are selected in a "1-2-2-5" combination. In the Type 980-C these values are 0.001, 0.002, 0.002, and 0.005 μF. The eleven position switch maintains a combination of the four standard capacitors in parallel to produce the decade of capacitance values. The Type 980-C decade units are used in the Types 1419-A and 1419-B Decade Capacitors.


  • Total Capacitance: .01 μF
  • Capacitance Per Step: .001 μF
  • Accuracy: two terminal ±1%, three terminal ±1.5%
  • Dissipation Factor: less than .0002 at 1 kHz
  • Maximum Voltage: 500 V
  • Frequency Limit for Maximum Voltage: 1 MHz
  • Dielectric: Polystyrene