A rare 1950-th Zenith Record Changer with Radio; model 8G20.
Got it with half working radio, battered cabinet and dead phonograph. Sanded cabinet put three layers of polyurethane and replaced worn canvas. Replaced rubber parts in phonograph: belts, motor anti-vibration mounts and levers inserts. Was unable to find replacement for the original Zenith head and stylus so I installed a modern substitute with diamond stylus. Discovered that it has lower signal output than original one so I added preamplifier to make the phonograph sound volume comparable to the volume from the radio. Also replaced wires with cracked insulation and installed white LED back light for radio dial illumination and red LED's in record player section. Another bonus I added later is a pair of small but highly efficient speakers connected to 3 watt per channel amplifier and Bluetooth receiver.
Now the unit is in perfect vintage working order with an ability to stream music from your phone, AM/FM radio or play really old 78 rpm vinyl records as well as more modern 33-1/3 LP. Receiver catches a lot of AM/FM stations even without external antenna and has a bit of cracking sound when AM/FM/Phono switch is moved.
It is worth to mention that unlike modern semiconductor devices vacuum tubes would not be knocked out by nuke blast electromagnetic pulse.
Two things I do not know if this is a malfunction or it was designed to work this way:
1. RPM selector has labeling 78, 33 (10"-12") and 33 (7"). When set to 33 (7") position stylus descend on track one of 7" diameter record, but when 33 (10"-12") is selected it only descend 5" from the center so for 12" LP I have to place it manually on track #1.
2. After a last track is finished, turntable does not stop but tonearm goes up return to 7" or 10" position and record plays again until stopped manually.