[Milsurplus] SCR-522 help

[Mil N More]

Can anyone tell me the IF of the
BC-624A receiver in the older line
of SCR-522 4 channel VHF radios?

Can anyone provide me with a schematic
of the BC-624A and transmitter BC-625A?
A scan attached to an email may work if the
resolution is high enough.  Just came across
four of these and only one has been modified
at all (for Civil Air Patrol), so I would like to
see about getting at least one of the other 
three working properly.

Jack Achas