John,
Which vector scope do you have? Is it the same heathkit 10-101 as I have? I have only used mine as a crosshatch/bar/dot alignment generator though the RF to the tuner on the set o far. It is very handy. I found it left behind by the trashcan at the Rochester Hamfest one year as a vendor was leaving. I wasn't doing vintage color Tv's at the time. It works perfectly. Boy am I glad now that I grabbed it!!!!
I'm looking for a copy of the user's manual for that if you might have one you can copy I'd gladly pay you.
BTW, nice avatar! Where'd you get the cool idea?
Rob