ESAW RESISTANCE BOX, PLUG TYPE (EEC-10367)

For accurate work. fitted in a plastic molded box. Split brass contact blocks hold precision cut, interchangeable brass plugs having molded black Bakelite fluted tops. Coils of constant  wire, non-inductively wound, double silk covered; with resistances precisely adjusted and are mounted underneath the panel with double nut arrangement. Accuracy 40.1%.