1481-M: Difference between revisions
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{{GR Product | |||
|model=1481-M | |||
|codes=INDUCTORED,1481-9713 | |||
|class=inductance standards | |||
|summary=5 H, ±0.4% inductor | |||
|image=GR 1481-M Front.jpg | |||
|caption=General Radio 1481-M Inductor | |||
|series=1481 | |||
|introduced=1951 | |||
|discontinued=1963 | |||
|designers= | |||
|manuals= | |||
* '''Manual Needed.''' | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 1481-M Inductor}} was introduced in {{Catalog M}} and remained available through {{Catalog R}}. | |||
The Type 1481-M inductor is of the toroid wound, dust-core design. The toroid is clamped between the two aluminum case halves. The 1481-M inductor is derived from Types 940 and 1490 decade inductors. Each inductor is engraved with nominal inductance, accuracy, and inductance change versus current. The connections are Type [[938-B]] Jack-Top binding posts, one being grounded. | |||
See the overview page [[1481]] for the complete series. | |||
==Specifications== | ==Specifications== | ||
* '''Nominal Inductance:''' 5 H | |||
* '''Adjustment Accuracy:''' ±0.4% | |||
* '''RMS Current:''' 0.34 mA | |||
* '''Resonant Frequency:''' 13.8 kHz | |||
* '''DC Resistance:''' 230 Ω approximately | |||
==Links== | ==Links== | ||
* [[Media:GR Exp 1491 12_1950.pdf|Experimenter December 1950 describing Type 1491 Series]] | |||
==Photos== | ==Photos== | ||
<gallery> | <gallery> | ||
GR 1481-M Front.jpg | |||
GR 1481 Top.jpg | |||
GR 1481 Rear.jpg | |||
GR 1481 Q versus Fo.jpg | |||
GR 1481 L change versus Current.jpg | |||
</gallery> | </gallery> | ||
[[Category:Inductance Standards]] | [[Category:Inductance Standards]] | ||
Latest revision as of 23:15, 17 July 2024
The General Radio 1481-M Inductor was introduced in Catalog M (1951) and remained available through Catalog R (1963).
The Type 1481-M inductor is of the toroid wound, dust-core design. The toroid is clamped between the two aluminum case halves. The 1481-M inductor is derived from Types 940 and 1490 decade inductors. Each inductor is engraved with nominal inductance, accuracy, and inductance change versus current. The connections are Type 938-B Jack-Top binding posts, one being grounded.
See the overview page 1481 for the complete series.
Specifications
- Nominal Inductance: 5 H
- Adjustment Accuracy: ±0.4%
- RMS Current: 0.34 mA
- Resonant Frequency: 13.8 kHz
- DC Resistance: 230 Ω approximately
