First try the AGC control. Usually going CCW will cut back on buzz & pix
tearing but also wash things out a bit. Going CW will do the opposite.
At a point going CW will really tear things up & cause a lot of buzz.
Second thing is to try adjusting the audio detector coil. If you do "flag"
your alignment tool. In other words put a piece of tape on it to be
SURE you can return it to the start. Dont go more than a half turn, if
you have to something else is wrong.
Keep in mind when this set was new NO add on stuff existed. When
they were in the 70's the set was considered obsolete.
73 Zeno
LFOD !