B&L ballast resistor for microscope lamp
Date: circa 1930
Inventory Number: 1996-1-0555
Classification: Transformer
Dimensions:12 x 24 x 10 cm (4 3/4 x 9 7/16 x 3 15/16 in.)
Description:
This is a large ballast resistor intended to operate a low voltage lamp, 6V, 4.35A, from a 115 volt AC line. The power cord is two prong and has a toggle switch. The front of the ballast has two binding posts.