The model 147 chassis is a four tube tuned radio frequency receiver designed for operation from 110 volt, 25 or 60 cycle AC and 110 volt DC circuits.

The tubes used in this set and their purpose:

39 R.F. Amplifier
36 Detector
38 Output
37 Rectifier

There was also a "Totem," which had a slightly different grill and no cabinet top. To see the differences, click on the ad link below.