Three Leads on SE OT Primary

[hack]

An old OT from a scrapped Single ended amp which once had 2 seven pin tubes and a 9 pin power tube (EL84, I guess). The OT has three primary leads. One blue wire is still connected to pin 7 of the el84 socket. I surmise that the red lead goes to DC power. Where does the green wire go? Numbers stamped on OT frame are TR-212 and 606127.

Of course, there are two secondary wires which exit on the opposite end.

Many Thanks.

[booj]

My guess would be the screen. What are the DC resistances between the leads?

[hack]

My guess would be the screen. What are the DC resistances between the leads?

No resistance on any leads. Secondary also shot. The point is now moot. New xformer is required. Thanks for your reply.