60's color motorola

[DaveWM]

Need to clarify some terms.

all the color guns are working (gets a BW pic needs all guns working)

Color is working, color is demodulating, in this case Color is NOT working.

Snow looks like snow generally seen when no signal is present or a weak signal is present. In your case you have snow in the pic. IF no pic and no snow then that would point to a tuner or IF issue.

Snow with pic could be

weak signal from source
bad balun at tuner
bad matching trans if used
dirty contracts (generally you can get a better pic by just messing with tuner by turning it show this up)
weak RF tube
AGC issues

dirty tuner is typical but again just using it (channing channels) will often point to this problem.

there is a correct way to clean a tuner, more on that later if that is the problem.