[Boatanchors] Info Needed

[David]

Greetings everyone. I have an old Command set type receiver that I found or 
had forgotten about should I say. This unit is a Aircraft Radio Corporation 
Receiver R-19 (28V) this is from a label on the front  of the unit.Under the 
lid it has the number R-13B. I know that this unit is in the frequency range 
118 to 148 Mhz and is AM. Can anyone tell me where I can find a circuit 
diagram and any other info as I would like to see if I can get it to run. 
The motor generator that sits at the back of the unit is missing, but I can 
work around that. Thanks for the help..Dave  VA7DG