Quote:
Originally Posted by zeno
What you have is an RCA built ac/dc set. The 3 prong
is for a battery pack. The 4 prong is for AC or DC 12V.
Get it wrong & you see fire engines.........
If you can get the KCS*** number I can look it up &
see which pins are for AC if I got the manual.
Number may be on back but IS on the chassis.
73 Zeno 
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Thanks! Ill do some digging when i get s second to see if i can find that number. I dont see it on the case but ill see if i can get inside it when i get time. Found this on ebay which looks to be very simular. Again ...no cord.
http://www.ebay.com/itm/Vintage-1979...item1c3bfddf48