1481

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 connections are Type 938-A Jack-Top binding posts, one being grounded.

Specifications

• See table below

Links

• Experimenter December 1950 describing Type 1481 Series

Type 1481 Series of Inductors

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

Photos

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