1432-A

The General Radio 1432-A Decade Resistor was introduced in Catalog M (1951) and remained available through Catalog P (1959).

The Type 1432-A is a decade resistance box comprised of three Type 510 decade resistance units in series, for a total resistance of l,110,000 Ω in steps of 1,000 Ω.

The 510 decade units use an 11-position switch, with the first position shorting the decade, and the following positions increasing the resistance by one step. The switch has a make-before-break configuration, i.e. regardless of the position there is always continuity between the 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.

Specifications

• Total Resistance: l,110,000 Ω
• Number of Decades: 3

Type 1432-A Installed 510 Decade Units

Decade Unit Type	Total Resistance	Resistance/Step	Accuracy/Step	Maximum Current	Power/Step
510-E	10,000 Ω	1000 Ω	±0.05%	23 mA	0.5 W
510-F	100,000 Ω	10,000 Ω	±0.05%	7 mA	0.5 W
510-G	1,000,000 Ω	100,000 Ω	±0.05%	2.3 mA	0.5 W

Links

• Experimenter June 1951 describing Type 1432 Series

1432-F – 3 decades, 111 Ω in steps of 0.1 Ω 1432-U – 4 decades, 111.1 Ω in steps of 0.01 Ω 1432-K – 4 decades, 1,111 Ω in steps of 0.1 Ω 1432-T – 5 decades, 1,111.1 Ω in steps of 0.01 Ω

1432-C – 3 decades, 11,100 Ω in steps of 10 Ω 1432-J – 4 decades, 11,110 Ω in steps of 1 Ω 1432-N – 5 decades, 11,111 Ω in steps of 0.1 Ω 1432-W – 6 decades, 11,111.1 Ω in steps of 0.01 Ω 1432-L – 4 decades, 111,100 Ω in steps of 10 Ω 1432-M – 5 decades, 111,110 Ω in steps of 1 Ω 1432-X – 6 decades, 111,111 Ω in steps of 0.1 Ω

1432-A – 3 decades, 1,110,000 Ω in steps of 1000 Ω 1432-Q – 4 decades, 1,111,000 Ω in steps of 100 Ω 1432-P – 5 decades, 1,111,100 Ω in steps of 10 Ω 1432-B – 6 decades, 1,111,110 Ω in steps of 1 Ω 1432-Y – 5 decades, 11,111,000 Ω in steps of 100 Ω 1432-Z – 6 decades, 11,111,100 Ω in steps of 10 Ω