It may well be alignment. Those 60 kcs IF's must be in alignment per the
manual or it will seem too narrow. Do that after checking the tubes in the
IF area (My experience is with the HQ-170 and HC-10).

The 60Kcs IF set the filter alignment for all of the selections (500hz, 1,
2, and 3 as I recall) double those values when switched to AM.

Hope you have the alignment part of the manual.

If that does not work check resistances and voltages.

73 Dave K4JRB