1432-U

The General Radio 1432-U Decade Resistor was introduced in Catalog Q (1961) and remained available through Catalog S (1965).

The Type 1432-U is decade resistance box is comprised of four Type 510 decade resistance units in series for a total resistance of 111.1 Ω. The 510 decade units use an 11 position switch, the first position shorts the decade the folowing positions increase the resistance by a factor of 1. The decade switch is what's refered 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 equiped with a shorting link to the case. The decades are housed in an aluminium case shielded and insulated from its resistance termials.

Specifications

• Total Resistance: 111.1 Ω
• Number of Decades: 4

Type 1432-U Installed 510 Decade Units

Decade Unit Type	Total Resistance Ohms	Resistance / Unit Ohms	Accuracy per increment	Maximum Current	Power/step
510-AA	0.1	0.01	±02%	4 A	0.6 W
510-A	1	0.1	±0.5%	1.6 A	0.6 W
510-B	10	1	±0.15%	800 mA	0.6 W
510-C	100	10	±0.05%	250 mA	0.6 W

Links

• Experimenter June 1951 describing Type 1432 Series
• Experimenter November 1960 describing Types 1432-T and 1432-U