Most common problems with these are the
main filter can which usually gives an hour glass
or Christmas tree effect & cold joints in the tuner / control
boards. Also may have a little choke by the flyback that is
cold like its bigger brothers had. Try some light tapping
around first..... Also see if the filament is going out, that
will tell you if the HV is dying. I doubt it, the current
should drop to near zero if it were.
73 Zeno
