[GreenKeys] Any information on the PP-987/U AKA REC-47 Power Supply??

[John Hensley]

Does anyone have any information on the PP-987/U  AKA  REC-47 Power Supply??
Would like to find a schematic, perhaps even a military user guide.  I'm not surewhether it is M19 or M28 class unit.

Pictures at:
http://www.w5jv.com/For_Sale_or_Trade/Teletype/ 		 	   		  
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