The 649A is a single band, AC/DC powered superheterodyne. The tuning range for this set is from 1725 to 540 Kilocycles (kHz). The model 649 chassis is the same as the model 5628 chassis, except in the design and mounting of the built-in loop antenna. The model 649 loop antenna is a spider form which mounts on the end of the chassis, while the 5628 loop antenna is mounted on the back of the receiver.
The tubes used in this set are:
6U7G I.F. Amplifier
6Q7G Detecotr, AVC, A.F. Amplifier
W-46773 Ballast Tube