05-14-2013, 01:33 PM
Right under the schematic from Rider's is a diagram of the bottom of the chassis with all the tube sockets labeled as to tube element. You may have to magnify the diagram, but the socket pins are marked P, K, Sg etc.
http://www.nostalgiaair.org/PagesByModel...013149.pdf
http://www.nostalgiaair.org/PagesByModel...013149.pdf