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

The Type 980-F is a decade capacitance unit that contains four Type 505 silver mica standard capacitors. The capacitor values are selected in a "1-2-2-5" combination. In the Type 980-F these values are 0.1, 0.2, 0.2, and 0.5 μF. The eleven position 980-P1 switch maintains a combination of the four standard capacitors in parallel to produce the decade of capacitance values. The Type 980-F decade unit is a component of the Type 1419-K Decade Capacitor.


  • Total Capacitance: 1 μF
  • Capacitance Per Step: 0.1 μF
  • Accuracy: two or three terminal ±0.5%
  • Dissipation Factor: less than 0.0003 at 1 kHz
  • Maximum Voltage: 500 V
  • Frequency Limit at Maximum Voltage: 10 kHz
  • Dielectric: Silvered Mica