1432-M

The General Radio 1432-M Decade Resistor was introduced in Catalog M (1951) and remained available through Catalog S (1965).

The Type 1432-M is decade resistance box is comprised of five Type 510 decade resistance units in series for a total resistance of 111.11 kΩ. The 510 decade units use an 11 position switch, the first position shorts the decade the following positions increase the resistance by a factor of 1. The decade switch is what's referred to as a make before break configuration, regardless of the position there's always a continuity at it's terminals. The terminals are Type 938 equipped with a shorting link to the case. The decades are housed in an aluminum case shielded and insulated from its resistance terminals.

See the table below for 510 decade units used.

Specifications

• Total Resistance:111,110 Ω
• Number of Decades: 5

Type 1432-M Installed 510 Decade Units

Decade Unit Type	Total Resistance Ohms	Resistance / Unit Ohms	Accuracy per increment	Maximum Current	Power/step
510-B	10	1	±0.15%	800 mA	0.6 W
510-C	100	10	±0.05%	250 mA	0.6 W
510-D	1,000	100	±0.05%	80 mA	0.6 W
510-E	10,000	1000	±0.05%	23 mA	0.5 W
510-F	100,000	10,000	±0.05%	7 mA	0.5 W

Links

• Experimenter June 1951 describing Type 1432 Series

Photos

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• File:GR 1432-M Inside Decade D-E-F.jpg