Resistance Decade Box

In polished, wooden or painted, metal case. Manganin coils of various resistance, wound non inductivity with precise adjustment of their valves, are mounted underneath an insulated, bakelite panel. On top of this panel, heavy brass blocks are mounted, provided connection across the resistance coils, with brass terminals at ends for electrical connection. Set of milled head plug, accurately tapered to fit the holes between the brass blocks, are interchangeable and provide very low contact resistance. Accuracy .1%.

            Range          No of               Total

              Amp.            Plugs           Resistance amp.

A.)                  0.1-.5                  9                     1.1

B.)                      .1-1                  6                      2

C.)                      .1-5                  9                     11

D.)                   1-100                10                    210

E.)                    1-500                13                    1110

F.)                   1-1000                14                    2110

1-5000                17                    11110