[Milsurplus] National RBH-2 Receiver

[David Stinson]

Just acquired a pretty nice RBH-2 receiver.
Anyone have a manual so I can do maintainance?
Need to be able to remove the catacomb without
tearing stuff up.

There's a rectangular box fitted to the back of the
receiver, making about 1/4 of the receiver's total depth.
It's enclosed from the rest of the receiver.  Speaker,
power and antenna connections come out of it, but
what's inside all that space?  Not power supply;
that's in the front part.

Thanks,
Dave AB5S