Motorola ts18 contrast control

[timmy]

Ok I have a restored ts18 Motorola chassis and if I use a green scope tube on my other sets which is another ts18 and ts4d it is very bright and excellent contrast however this recent ts18 I have just finished restoring. If I put the same scope tube on this chassis the contrast seems to work fine but to get it not to kind of wash out at hi brightness I have to lower the brightness but the other sets I don't have to. The scope tube I would say is new, that's how good it is. So I am wondering if the 3 caps on the contrast control could be bad in such a way that it is preventing the bright from being raised more. It seems like there is a balance between the contrast control and the brightness.where if the bright was up and contrast was at half it then looks cloudy and then advance the contrast up and it darkens the pic. The ts18 only has the caps on the contrast pot. This chassis don't seem to have enough of range in the darker areas so I was thinking those caps on the pot. What do you think mr bandersen as you seem to know these sets very well ?