[jshorva65]

Yes, it's a Heathkit I0-101. Unfortunately, I don't have the manual for it ... yet. Since vectorscopes in general are fairly simple instruments, I could probably get by without the manual. The 3.58 MHz trimmer is at the rear of the main PCB, the 157 kHz peaking (vertical bar sharpness) trimmer is at the front of the main PCB, I'm not sure what the trimpot on the main PCB does. That pot probably fine-tunes the 600 Hz (horiz bar) oscillator. The RF trimmer is on the front panel PCB. Since it's crystal controlled, it's very stable (unless a bad connection intermittently knocks the burst off frequency). I feed RF into the set via the antenna terminals, haven't tried hooking it up to the video yet. I connect the R/G/B gun leads to the corresponding R-Y, G-Y and B-Y points on the chassis and ground the black lead to the chassis to use the gun kill switches. A vectorscope is a great multi-purpose tool to have with these old sets.

As for the Avatar, great ideas are bound to be borrowed eventually. I like your "studio standard" bar pattern better than my simpler bar pattern.