Pinout

Pin #	Assignment
3	Blue Pin
4	Heater (F1)
5	Heater (F2)
6	G1 Red Pin
6	G1 Green Pin
6	G1 Blue Pin
7	Red Pin
8	G2 Red Pin
8	G2 Green Pin
8	G2 Blue Pin
9	Green Pin

Note: If you only see one assignment or reused pin for G1 (or G2), it means there is only a single G1 (or G2) grid shared across all cathodes. This is called "common G1" (or "common G2"). In this case, when using a Universal Adapter (UA), you only have to hook up one G1 (or G2) lead on your tester to connect all cathodes' G1 or G2 properly.

Sencore CRT Tester Info

Tester Model	Heater	Socket	Bias	Video
CR-7000	-	5	68V	Video 2
CR-70	-	13/UA	52V	VIDEO
CR-31	-	-	C	N/A