The buzz may be from your source. Remember when this was built
there were no add ons like VCR, DVD, games, cable boxes & most
old sets dont like them. AGC & fine tune can affect them also.
The DVD with RF out is the best choice but even at that lettering will drive you nuts with buzz & streaking.
Fine tuning acts like this, I will go clockwise the way most do.
First you get a poor B&W pix & weak sound. As you go CW the
pix & sound get better. A little farther & the color pops in.
If you keep going you start getting a wormy pix then it will go away.
If you keep going you will you usually hit the next channel up.
If a set has AFT, AFC or auto color buttons turn them OFF
before FTing. You dont have them, it "works" without them.
73 Zeno
LFOD !