IIRC this model has no A/V inputs so its gotta go through
the antenna input. About this vintage you may want to
find either a 19" System 3 or the newer Advanced System 3.
S-3 sets have a comb filter that will help. Only a few rare
models had A/V jacks. 13" S-3 sets did not have comb filters.
Advanced S-3 sets ( 20" + ) had comb filters & most have A/V jacks.
They also came in cube styling 20 " that has about the same
footprint as a 13".
73 Zeno