I don't have the disk handy but If I recall it's a chromatic step up from E, so E F F# since the lick is F# E. Now I have to get nostalgic and get that disk out, it's funny my tastes have radically changed nowdays, but I still have great respect for the roots as it were.

And I still like to rock out every now and then.
I saw Pete several times many years back, he was like the Angus Young of bass, running like a madman all over the stage. He even blew out his leather pants at one show, thank goodness for the Union Jack boxers. LOL
Dirk