980-A: Difference between revisions
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{{GR Product | {{GR Product | ||
|model=980- | |model=980-A | ||
|codes= | |codes=AVAST | ||
|class=capacitance standards | |class=capacitance standards | ||
|summary=Decade Capacitor Unit | |summary=Decade Capacitor Unit | ||
|image=GR 980- | |image=GR 980-A Front.jpg | ||
|caption=General Radio 980- | |caption=General Radio 980-A Decade Capacitor Unit | ||
|series=980 | |series=980 | ||
|introduced=1956 | |introduced=1956 | ||
| Line 14: | Line 14: | ||
{{Catalog History}} | {{Catalog History}} | ||
}} | }} | ||
The {{Title|General Radio 980- | The {{Title|General Radio 980-A Decade Capacitor Unit}} was introduced in {{Catalog O}} and remained available through {{Catalog S}}. | ||
The Type 980- | The Type 980-A is a decade capacitance unit comprising four polystyrene capacitors sealed in two brass tubs mounted on either side of the switch. The capacitor values are selected in a "1-2-2-5" combination. In the Type 980-A these values 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. The Type 980-A decade units are used in the Types [[1419-A]] and [[1419-B ]] Decade Capacitors. | ||
==Specifications== | ==Specifications== | ||
| Line 22: | Line 22: | ||
* '''Total Capacitance:''' 1 μF | * '''Total Capacitance:''' 1 μF | ||
* '''Capacitance Per Step:''' .1 μF | * '''Capacitance Per Step:''' .1 μF | ||
* '''Accuracy:''' two or three terminal | * '''Accuracy:''' two or three terminal ±1% | ||
* '''Dissipation Factor:''' less than . | * '''Dissipation Factor:''' less than .0002 at 1 kHz | ||
* '''Maximum Voltage:''' 500 V | * '''Maximum Voltage:''' 500 V | ||
* '''Frequency Limit for Maximum Voltage:''' 10 kHz | |||
* '''Dielectric:''' Polystyrene | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 980 | * [[Media:GR Exp 980 1419-A 07_1956.pdf|Experimenter July 1956 describing Types 980 and 1419-A]] | ||
* [[Media:GR Exp | * [[Media:GR Exp 980 Series 1457-K 10_1957.pdf|Experimenter October 1957 describing Type 980 and 1419-K]] | ||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 1419-B 980-A Inside.jpg | |||
GR 1419- | GR 1419-B 980-A Left.jpg | ||
GR 1419- | GR 1419-B 980-A Right.jpg | ||
GR 1419- | GR 1419-B 980-A Top.jpg | ||
GR 1419- | |||
</gallery> | </gallery> | ||
[[Category:Capacitance Standards]] | [[Category:Capacitance Standards]] | ||
Latest revision as of 21:47, 19 May 2024
The General Radio 980-A Decade Capacitor Unit was introduced in Catalog O (1956) and remained available through Catalog S (1965).
The Type 980-A is a decade capacitance unit comprising four polystyrene capacitors sealed in two brass tubs mounted on either side of the switch. The capacitor values are selected in a "1-2-2-5" combination. In the Type 980-A these values 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. The Type 980-A decade units are used in the Types 1419-A and 1419-B Decade Capacitors.
Specifications
- Total Capacitance: 1 μF
- Capacitance Per Step: .1 μF
- Accuracy: two or three terminal ±1%
- Dissipation Factor: less than .0002 at 1 kHz
- Maximum Voltage: 500 V
- Frequency Limit for Maximum Voltage: 10 kHz
- Dielectric: Polystyrene
Links
- Experimenter July 1956 describing Types 980 and 1419-A
- Experimenter October 1957 describing Type 980 and 1419-K
