[Premium-Rx] Receiver Manuals

[Paul and Julie Nell]

Seeking technical manuals and/or schematics for the following receivers (not much helpful information that I could find on the internet): 


---R-1440/WLR-6 small receiver approximately 5''W. X 8"H., solid state, used on submarines, 0.5 to 32.0 Mhz, red dot matrix
       LED display, no band swich-continuaous tuning.

   ---R-1441/WLR-6(V) small receiver approximately 5''W. X 8"H., solid state, used on submarines, 0.5 to 32.0 Mhz, NIXIE tube 
      display, has band switch.

   ---SR502B-12 Solid state 0.5 Mhz to 32 Mhz, tape frequency readout, manufactured by ACL (located in Maryland) this particular unit 
      comes with a pan adapter located on the left and the receiver module located on the right, this unit is missing some of the cards 
      located in the center of the unit, both receiver and pan adapter are plug-in type modules.
      
      Also looking for cards, parts unit or complete SR502B-12 receiver.

   ---Also a friend is seeking information (manual/schematics) for a National R-1230/FLR receiver and the associated combination supply/ 
      oscilator No.O-1187/FLR (the O-1187/FLR complete unit if you know of one that would be available).  

Any assistance will be greatly appreciate. Will gladly help with copy expenses and your time. 

Regards and thank you,
Paul N3YHO