[gary rabbitt]

Hi Todd, welcome!

Here is a schematic for your set.
http://www.nostalgiaair.org/Resources/251/M0013251.htm

It sure would be a shame to use this as just a speaker. Having a 'working' set is ok, but there are original parts inside that can fail rather quickly at any time, causing serious damage.
Please see:
http://www.philcoradio.com/tech/plugin.htm
You may not understand all of it, but you get the idea.

You could build or buy a small transmitter to broadcast to your radio, once it has been serviced and working safely.
Don't worry about the power consumption of the sets. You aren't going to run them 24/7. Get a battery setup so you can run it off batteries.If you are going to have other sets, mayne throw another solar panel up Or, unplug something else to make up the difference.
Good luck with your set.
Gary.