1482

The General Radio 1482 Series of Standard Inductors was introduced in Catalog N (1954) and remained available through Catalog 1978.

The Type 1482 series of inductance standards are designed to replace the Type 106 Standard Inductor. These new inductors are symmetrically wound toroid on a ceramic core. The toroid is hermetically sealed in a mixture of cork and silica gel then potted in an aluminum case. The connections to the inductor are three Type 938-A jack-top binding posts. Two of the terminals for the inductor and the third is the case connection with shorting link, affording two or three terminal standards. Each inductor is supplied with a calibration certificate with corrections for 200 Hz, 500 Hz, and 1 kHz.

Specifications

• Stability: inductance change is less than ±0.01% per year
• Temperature Coefficient of Inductance: a 1% increase in resistance, produced by a temperature increase of 2.54° C corresponds to 0.0076% increase in inductance
• Maximum Input Power: for 20° C rise, 3 watts; for precise work, 1.5° C rise, 200 milliwatts
• For all other secifications see table below

Type 1482 Series of Standard Inductors

Type	Nominal Inductance	Accuracy	Resonant Frequency	DC Resistance	Q At 100 Hz	Current rms for 200 mW	Catalog Number
1482-A	50 μH	±0.5%	3.1 MHz	0.039 Ω	0.81	2.260 A	1482-9701
1482-B	100 μH	±0.25%	2.25 MHz	0.083 Ω	0.76	1.155 A	1482-9702
1482-C	200 μH	±0.25%	1.4 MHz	0.15 Ω	0.84	1.150 A	1482-9703
1482-D	500 μH	±0.1%	960 kHz	0.38 Ω	0.83	725 mA	1482-9704
1482-E	1 mH	±0.1%	800 kHz	0.84 Ω	0.75	490 mA	1482-9705
1482-F	2 mH	±0.1%	580 kHz	1.52 Ω	0.83	360 mA	1482-9706
1482-G	5 mH	±0.1%	320 kHz	3.8 Ω	0.83	230 mA	1482-9707
1482-H	10 mH	±0.1%	220 kHz	8.2 Ω	0.77	156 mA	1482-9708
1482-J	20 mH	±0.1%	145 kHz	14.5 Ω	0.87	117 mA	1482-9710
1482-K	50 mH	±0.1%	84 kHz	36.8 Ω	0.85	74 mA	1482-9711
1482-L	100 mH	±0.1%	71 kHz	81 Ω	0.78	50 mA	1482-9712
1482-M	200 mH	±0.1%	39 kHz	109 Ω	1.15	43 mA	1482-9713
1482-N	500 mH	±0.1%	24.5 kHz	280 Ω	1.12	27 mA	1482-9714
1482-P	1 H	±0.1%	14.6 kHz	616 Ω	1.02	18 mA	1482-9716
1482-Q	2 H	±0.1%	10.6 kHz	1125 Ω	1.12	13.3 mA	1482-9717
1482-R	5 H	±0.1%	6.8 kHz	2920 Ω	1.08	8.3 mA	1482-9718
1482-T	10 H	±0.1%	4.9 kHz	6400 Ω	0.98	5.6 mA	1482-9720

Links

• Experimenter November 1952 describing Type 1482 Series

Photos

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