The top thing *was* a radio and the bottom thing *was* two power amps. I would submit that the third power amp hasn't been installed yet; it would go below the other two.

No mixer here; you get radio XOR phonograph XOR hand microphone XOR auditorium microphone. It's interesting that there is a separate level control for the microphones, but not for the radio or phono - unless the radio volume control served as the level control.

I also suspect that the panel with the two meters isn't quite finished yet; I bet there will be two cords with 1/4" plugs emerging from the panel later. Each cord will be permanently connected at one end to one of the meters, while the other end can be plugged into channel 1, 2, or 3 to make a measurement - it's a DP3T or DP4T switch made the hard way.

It's also interesting that there are two phonograph inputs; probably so you can start the second record right away. Two turntables and a microphone...

looks like a large paper speaker cone that's been removed from one of the tabletop double-diaphragm dynamic speakers that were characteristic of the time.

I am guessing that Windex was in very short supply back then. Could have shined that transceiver up in a jiffy!

This is a combination broadcast radio receiver and PA system, often used in institutions. It also can serve as a phonograph amplifier, judging by the function switch. I have two 1929 radio receivers, an American Bosch, and a Radiola. Both have the same sort of tuning system from the consumer perspective, but differ on the other side. The broken glass at the top appears to be decorative, in combination with some sort of small light.

[That "broken glass" is something on the wall. - Dave]

I am a Amateur Radio operator of 23 years. That is an old vacuum tube PA system. Although, it does looks like an older Amateur Radio setup. They did use a lot of the same parts back then.

73 de Chuck K8CPA

...-.- ..

[The top unit has a radio tuning dial. - Dave]