1481: Difference between revisions
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{{GR Product | |||
|model=1481 | |||
|codes= | |||
|class=inductance standards | |||
|summary=Inductances | |||
|image=GR 1481-K Front.jpg | |||
|caption=General Radio 1481 Series of Inductances | |||
|series=1481 | |||
|introduced=1951 | |||
|discontinued=1963 | |||
|designers= | |||
|manuals= | |||
* '''Manual Needed.''' | |||
{{Catalog History}} | |||
}} | |||
The {{Title|General Radio 1481 Series of Inductances}} was introduced in {{Catalog M}} and remained available through {{Catalog R}}. | |||
The Type 1481 Series of standard inductors are of the toroid design wound design. The toroid is clamped between the two aluminum case halves. The 1481 inductors are derived from Types 940 and 1490 decade inductors. Each inductor in the series is engraved with nominal inductance, accuracy, and inductance change versus current. The connectiosn are Type [[938-B]] Jack-Top binding posts, one being grounded. | |||
==Specifications== | |||
* '''See table below''' | |||
==Links== | |||
* [[Media:GR Exp 1491 12_1950.pdf|Experimenter December 1950 describing Type 1491 Series]] | |||
{| class="wikitable" style="margin:auto" | |||
|+ Type 1481 Series of Inductors | |||
|- | |||
! Type!! Nominal<br>Inductance !! Accuracy !! Rms Current !! Resonant<br>Frequency!! Approx DC<br>Resistance !!Code<BR>Word | |||
|- | |||
| [[1481-AA]] || 100 μH ||±2.0% || 141 ma || 3.99 MHz ||0.020 Ω || 1481-9806 | |||
|- | |||
| [[1481-BB]] || 200 μH ||±2.0% || 100 ma || 2.70 MHz ||0.044 Ω || 1481-9808 | |||
|- | |||
| [[1481-CC]] || 500 μH ||±1.0% || 63 ma || 1.64 MHz ||0.112 Ω || 1481-9809 | |||
|- | |||
| [[1481-A]] || 1 mH ||±1.0% || 24 ma || 1.10 MHz ||0.043 Ω || 1481-9701 | |||
|- | |||
| [[1481-B]] || 2 mH ||±1.0% || 17 ma || 779 kHz ||0.098 Ω || 1481-9702 | |||
|- | |||
| [[1481-C]] || 5 mH ||±1.0% || 11 ma || 490 kHz ||0.25 Ω || 1481-9703 | |||
|- | |||
| [[1481-D]] || 10 mH ||±0.6% || 7.6 ma || 310 kHz ||0.44 Ω || 1481-9704 | |||
|- | |||
| [[1481-E]] || 20 mH ||±0.6% || 5.4 ma || 220 kHz ||0.95 Ω || 1481-9705 | |||
|- | |||
| [[1481-F]] || 50 mH ||±0.6% || 3.4 ma || 135 kHz ||2.3 Ω || 1481-9706 | |||
|- | |||
| [[1481-G]] || 100 mH ||±0.4% || 2.4 ma || 94 kHz ||4.3 Ω || 1481-9707 | |||
|- | |||
| [[1481-H]] || 200 mH ||±0.4% || 1.7 ma || 66 kHz ||7.2 Ω || 1481-9708 | |||
|- | |||
| [[1481-J]] || 500 mH ||±0.4% || 1.1 ma || 41 kHz ||22 Ω || 1481-9710 | |||
|- | |||
| [[1481-K]] || 1 H ||±0.4% || 0.76 ma || 30 kHz ||40 Ω || 1481-9711 | |||
|- | |||
| [[1481-L]] || 2 H ||±0.4% || 0.54 ma || 21.8 kHz ||91 Ω || 1481-9712 | |||
|- | |||
| [[1481-M]] || 5 H ||±0.4% || 0.34 ma || 13.8 kHz ||230 Ω || 1481-9713 | |||
|- | |||
| [[1481-N]] || 10 H ||±0.4% || 0.24 ma || 9.5 kHz ||416 Ω || 1481-9714 | |||
|- | |||
|} | |||
==Photos== | |||
<gallery> | |||
GR 1481 Top.jpg | |||
GR 1481 Rear.jpg | |||
GR 1481 Q versus Fo.jpg | |||
GR 1481 L change versus Current.jpg | |||
</gallery> | |||
[[Category:Inductance Standards]] | |||
Revision as of 19:25, 11 July 2024
The General Radio 1481 Series of Inductances was introduced in Catalog M (1951) and remained available through Catalog R (1963).
The Type 1481 Series of standard inductors are of the toroid design wound design. The toroid is clamped between the two aluminum case halves. The 1481 inductors are derived from Types 940 and 1490 decade inductors. Each inductor in the series is engraved with nominal inductance, accuracy, and inductance change versus current. The connectiosn are Type 938-B Jack-Top binding posts, one being grounded.
Specifications
- See table below
Links
| Type | Nominal Inductance |
Accuracy | Rms Current | Resonant Frequency |
Approx DC Resistance |
Code Word |
|---|---|---|---|---|---|---|
| 1481-AA | 100 μH | ±2.0% | 141 ma | 3.99 MHz | 0.020 Ω | 1481-9806 |
| 1481-BB | 200 μH | ±2.0% | 100 ma | 2.70 MHz | 0.044 Ω | 1481-9808 |
| 1481-CC | 500 μH | ±1.0% | 63 ma | 1.64 MHz | 0.112 Ω | 1481-9809 |
| 1481-A | 1 mH | ±1.0% | 24 ma | 1.10 MHz | 0.043 Ω | 1481-9701 |
| 1481-B | 2 mH | ±1.0% | 17 ma | 779 kHz | 0.098 Ω | 1481-9702 |
| 1481-C | 5 mH | ±1.0% | 11 ma | 490 kHz | 0.25 Ω | 1481-9703 |
| 1481-D | 10 mH | ±0.6% | 7.6 ma | 310 kHz | 0.44 Ω | 1481-9704 |
| 1481-E | 20 mH | ±0.6% | 5.4 ma | 220 kHz | 0.95 Ω | 1481-9705 |
| 1481-F | 50 mH | ±0.6% | 3.4 ma | 135 kHz | 2.3 Ω | 1481-9706 |
| 1481-G | 100 mH | ±0.4% | 2.4 ma | 94 kHz | 4.3 Ω | 1481-9707 |
| 1481-H | 200 mH | ±0.4% | 1.7 ma | 66 kHz | 7.2 Ω | 1481-9708 |
| 1481-J | 500 mH | ±0.4% | 1.1 ma | 41 kHz | 22 Ω | 1481-9710 |
| 1481-K | 1 H | ±0.4% | 0.76 ma | 30 kHz | 40 Ω | 1481-9711 |
| 1481-L | 2 H | ±0.4% | 0.54 ma | 21.8 kHz | 91 Ω | 1481-9712 |
| 1481-M | 5 H | ±0.4% | 0.34 ma | 13.8 kHz | 230 Ω | 1481-9713 |
| 1481-N | 10 H | ±0.4% | 0.24 ma | 9.5 kHz | 416 Ω | 1481-9714 |
