Good Morning John.
I have received some additional information from a friend.

Pin #1 - Oven Heater (see pin #4 info)
Pin #2 - N.C.
Pin #3 - Output to an incandescent indicator lamp. Shows oven on/off. (ground other lamp lead) Use a bulb which matches the heater and oscillator voltage.
Pin #4 - Plus voltage to oscillator (Less than 30 volts for his model) Start low and work up.
Pin #5 - Negative voltage to oscillator (can connect to ground).
Pin #6 - Oven Heater (can connect to ground).
Pin #7 - 1 MC/S RF output into 500 ohm load.
Pin #8 - Ground for entire shield can and for the R F output.

Please look at my previous post to see how my socket was wired.
Thank you, Eric.