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{{Catalog History}}
{{Catalog History}}
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The {{Title|General Radio 980-A Decade Capacitor Unit}} was introduced in {{Catalog O}} and remained available through {{Catalog S}}.  
The {{Title|General Radio 980 Series Decade Capacitance Units}} were introduced in {{Catalog O}} and remained available through {{Catalog S}}.  


The Type 980 Series are decade capacitance units comprising four capacitors sealed in brass containers. The capacitor values are selected in a "1-2-2-5" combination. For example the values used with Type [[980-A]] are 0.1, 0.2, 0.2, and 0.5 μF.  The eleven position switch maintains a combination of the four standard capacitors in parallel to produce the decade of capacitance values. Capacitors using different dielectric materials are used in the series, polystyrene, silvered mica, paper, and moulded silvered mica. The Type 980 decade units are components of Types [[1419-A]], [[1419-B ]], [[1419-K ]], and [[1419-M ]] Decade Capacitors. Also available separatly, the switch mechanism without capacitors for service or experimental use under the Type [[980-P1]].
The Type 980 Series decade capacitance units are comprised of four capacitors mounted on a [[980-P1]] switch. The capacitor values are selected in a "1-2-2-5" combination, e.g. the values for  Type [[980-A]] are 0.1, 0.2, 0.2, and 0.5 μF.  The eleven-position switch maintains a combination of the four standard capacitors in parallel to produce the decade of capacitance values.  
 
Capacitors using different dielectric materials are used in the series − polystyrene, silvered mica, paper, and moulded silvered mica. The Type 980 decade units are components of Types [[1419-A]], [[1419-B]], [[1419-K]], and [[1419-M]] Decade Capacitors. The switch mechanism without capacitors was also available separately for service or experimental use, as Type [[980-P1]].


==Specifications==
==Specifications==


* '''Two Terminal Zero Capacitance:''' 11 pF
* '''Two-Terminal Zero Capacitance:''' 11 pF
* '''Three Terminal Zero Capacitance:''' 5 pF
* '''Three-Terminal Zero Capacitance:''' 5 pF
* '''Terminals:''' flexible leads
* '''Terminals:''' flexible leads
* '''Maximum Voltage:''' 500 V
* '''Maximum Voltage:''' 500 V


==Links==
* [[Media:GR Exp 980 1419-A 07_1956.pdf|Experiment July 1956 describing Type 980]]
* [[Media:GR_Exp_980_Series_1457-K_10_1957.pdf|Experimenter October 1957 describing Type 980]]


* '''Notes for Specifications Table:'''
* '''Notes for table below:'''
* '''Dissipation Factor is at 1 kHz'''
* '''Dissipation Factor is at 1 kHz'''
* '''Frequency Limit is for the maximum voltage'''
* '''Frequency Limit is for the maximum voltage'''
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==Photos==


==Links==
* [[Media:GR Exp 980 Series 10_1957.pdf|Experimenter October 1957 describing Type 980]]
* [[Media:GR Exp 505 1457-K 10_1957.pdf|Experimenter October 1957 describing Types 505 and 1457-K]]
==Photos==
<gallery>
<gallery>
GR 1419-K 980-H Right A.jpg|Type 980-H Decade Unit
GR 1419-K 980-H Right A.jpg|Type 980-H Decade Unit
GR 1419-B 980-A Top.jpg|Type 980-A Decade Unit
GR 1419-B 980-A Top.jpg|Type 980-A Decade Unit
</gallery>
</gallery>

Latest revision as of 14:03, 20 May 2024

General Radio 980
Decade Capacitor Unit
General Radio 980 Decade Capacitor Unit

Available from 1956 to 1965

Manuals
  • 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 Series Decade Capacitance Units were introduced in Catalog O (1956) and remained available through Catalog S (1965).

The Type 980 Series decade capacitance units are comprised of four capacitors mounted on a 980-P1 switch. The capacitor values are selected in a "1-2-2-5" combination, e.g. the values for Type 980-A are 0.1, 0.2, 0.2, and 0.5 μF. The eleven-position switch maintains a combination of the four standard capacitors in parallel to produce the decade of capacitance values.

Capacitors using different dielectric materials are used in the series − polystyrene, silvered mica, paper, and moulded silvered mica. The Type 980 decade units are components of Types 1419-A, 1419-B, 1419-K, and 1419-M Decade Capacitors. The switch mechanism without capacitors was also available separately for service or experimental use, as Type 980-P1.

Specifications

  • Two-Terminal Zero Capacitance: 11 pF
  • Three-Terminal Zero Capacitance: 5 pF
  • Terminals: flexible leads
  • Maximum Voltage: 500 V

Links

  • Notes for table below:
  • Dissipation Factor is at 1 kHz
  • Frequency Limit is for the maximum voltage
Type 980 Series of Decade Capacitor Units
Type Capacitance
Total		 Capacitance
Per Step		 Dissipation
Factor		 Accuracy
2 Terminal		 Accuracy
3 Terminal		 Dielectric Frequency
Limit		 Code
980-A 1 μF 0.1 μF <0.0002 ±1% ±1% Polystyrene 10 kHz AVAST
980-B 0.1 μF 0.01 μF <0.0002 ±1% ±1% Polystyrene 100 kHz AVERT
980-C 0.01 μF 0.001 μF <0.0002 ±1% ±1.5% Polystyrene 1 MHz AVOID
980-D 0.001 μF 0.0001 μF <0.0002 ±(1% + 2 pF) ±1% -(2% + 4 pF) Polystyrene 10 MHz ALIEN
980-F 1 μF 0.1 μF <0.0003 ±0.5% ±0.5% Silvered Mica 10 kHz ACUTE
980-G 0.1 μF 0.01 μF <0.0003 ±0.5% ±0.5% Silvered Mica 100 kHz AVOWD
980-H 0.01 μF 0.001 μF <0.0003 ±0.5% ±1% Silvered Mica 1 MHz AWAIT
980-J 0.001 μF 0.0001 μF <0.0006 ±(0.5% + 2 μF) +0,(±2% + 8 μF) Silvered Mica 10 MHz ADIEU
980-L 1 μF 0.1 μF <0.005 ±1.5% ±1.5% Paper 2 kHz ADAGE
980-M 0.1 μF 0.01 μF <0.001 ±1% ±1% Silver Mica (Moulded) 100 kHz ADDER
980-N 0.01 μF 0.001 μF <0.001 ±1% ±1% Silver Mica (Moulded) 1 MHz ADDLE

Photos

  • Type 980-H Decade Unit

    Type 980-H Decade Unit

  • Type 980-A Decade Unit

    Type 980-A Decade Unit

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