General Electric M113YRD

[zeno]

For the tearing try running a weak signal & see if it
gets better. If so look at AGC. If not horz AFC diode area.
The UHF is the drive mech. Its replaceable, IIRC just clips
in place. Very common fail.
Antenna probably is ball & rod clamped in a C shaped mount.
You could change the ball & rod or just the rod. Finding
the right size is the trick.
Keep in mind these sets were built to just run & sell cheap.
The parts count is very low & it dont take much to cause
trouble. Shows were the name " Good Enough" came from.

73 Zeno
LFOD !