It looks like their portable Hi-Fi's and stereo's of the day. I always thought it was neat, the way they snuck the PC board under the turntable.
I'm willing to bet, that you had to use their external speakers, because of the strange 39 ohm impedence.
A fellow collector mentioned that, if you ran the unit at higher volume, the turntable would slow down slightly because of the higher current drawn through the motor/transformer.
