Swapped G07 tube, what's yellow cable for?

[RayB]

Got a G07 in a Midway cocktail and I can't get any reds (well, maybe the faintest of dark brown), and the other colors are kind of weak. I tried a different (known working) chassis and the image is the same. I tweak the pots on the neckboard and barely see any difference in anything. I think only the blue showed any effect.

To be sure it wasn't the signal, I hooked up another good monitor to the video output and that one showed a nice bright colorful picture.

So... experts, is it likely a dying tube/guns?

[SirPeale]

Someone recently described a similar problem.  Check R517.

[Kevin Mullins]

But if a known working chassis had the same results, then I'd be checking the tube.

[Ken Layton]

Connect the tube to a rejuvenator and test it. Ends any guesswork.

[SirPeale]

That'll teach me to skim.  Yeah, hook it to a rejuvenator (if available) and if that fails, replace the tube.

[RayB]

As if I'm gonna find a rejuvenator. ;-)
OK so I found another G07 tube and swapped them. Paired it with my "best" chassis (a clean, capped one with new flyback and width coil). Got a nice picture, but the Horizontal width coil adjustment does nothing. Any ideas?

Oh, and I need to know if this flat yellow cable is supposed to be attached to anything (the cabinet had no wires that would appear to attach to that)

[Ken Layton]

That's the picture tube ground wire. It plugs into the "E" terminal on the neckboard.

[RayB]

What gauge wire should I use?
I don't have this wire on ANY of the 3 G07 chassis in my possession.

[Kevin Mullins]

What Kens saying is there is a "pin" that that plugs directly into on the neckboard.
Look for what looks like a test pin marked "E".
Usually a small spade terminal looking pin. (matches the end on the yellow wire)

[RayB]

OH. What threw me off is that BOTH tubes had that cable mounted in the plastic cable holders. I thought that's where it went. LOL

Thanks

[Kevin Mullins]

Nah, looks like they just did that to hold it out of the way.

That plastic cable holder on the tube is actually for the big red flyback anode lead.