Floor Model Magnavox

[Thatch_Ear]

I picked up a very cool red papered 15 inch field coil with an alnico tweeter bracketed in the center. All I know is that it came out of a large mono Magnavox console. The only thing in the cabinet was the speaker which I got for $5 but without any tuner or amp numbers I can not pull a Sams on it to find out the voltage needed for the field coil magnet. Any info on where to look or ask would be great.