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Type '''980 Series of Decade Capacitor Units'''.
{{GR Product
|model=980
|codes=
|class=capacitance standards
|summary=Decade Capacitor Unit
|image=GR 1419-B 980-A Top.jpg
|caption=General Radio 980 Decade Capacitor Unit
|series=980
|introduced=1956
|discontinued=1965
|designers=
|manuals=
* '''Manual Needed.'''
{{Catalog History}}
}}
The {{Title|General Radio 980 Series Decade Capacitance Units}} were introduced in {{Catalog O}} and remained available through {{Catalog S}}.
 
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
* '''Three-Terminal Zero Capacitance:''' 5 pF
* '''Terminals:''' flexible leads
* '''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 table below:'''
* '''Dissipation Factor is at 1 kHz'''
* '''Frequency Limit is for the maximum voltage'''
{| class="wikitable" style="margin:auto"
{| class="wikitable" style="margin:auto"
|+ Type 980 Series of Decade Capacitor Units
|+ Type 980 Series of Decade Capacitor Units
|-
|-
! Type!! Capacitance<br>Total !! Capacitance<br>Per Step !! Dissipation Factor !! Accuracy<br>2 Terminal !! Accuracy<br>3 Terminal !!Dielectric !!Frequency<br>Limit!! Code
! Type!! Capacitance<br>Total !! Capacitance<br>Per Step !! Dissipation<br>Factor !! Accuracy<br>2 Terminal !! Accuracy<br>3 Terminal !!Dielectric !!Frequency<br>Limit !! Code
|-
|-
|[[980-A]] || 1 μF    || 0.1 μF    || <0.0002  || ±1%         || ±1%              || Polystyrene || 10 kHz at 500 V || AVAST
|[[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 at 500 V || AVERT
|[[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 at 500 V   || AVOID
|[[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 at 500 V || ALIEN
|[[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
|-
|-
|}
|}


==Links==
==Photos==
 


==Photos==
<gallery>
<gallery>
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
</gallery>
</gallery>
[[Category:Capacitance Standards]]

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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