Sencore CR31A "Super Mack" socket issue

[N2IXK]

The pinout of the 11 pin connector coming from the unit is as follows:

1.) Heater + Ground
2.) Red Cathode
3.) Green Cathode
4.) Red G2
5.) Green G2
6.) Blue G2
7.) Blue Cathode
8.) Red G1
9.) Green G1
10.) Blue G1
11.) Heater

A monochrome tube uses the red gun connections, so you connect the corresponding pins of a suitable duodecal CRT socket to an 11 pin plug as follows:

CRT Pin CR31 Pin

1 ---> 1
2 ---> 8
10 ---> 4
11 ---> 2
12 ---> 11

This will get you an equivalent for Adapter #1.