decade plug resistance box
Date: circa 1938
Inventory Number: 1997-1-0196
Classification: Resistance Box
Dimensions:13.5 x 24 x 19.3 cm (5 5/16 x 9 7/16 x 7 5/8 in.)
Accessories: plugs (6)
Description:
Resistance box consisting of a wooden base supporting a hard-rubber top cover. On that cover is fixed ten rows of ten brass blocks underneath which are a coil connecting one block to the other. A few of the contact blocks have some corrosion. Between each pair of blocks would once have been a removable brass plug (six are present now). There are also two binding posts at one end of the cover. The numbers found besides the blocks are the resistance values of the coils. (Marked .1,1,10,100,1000).