[dtvmcdonald]

It was shrinking horiontally (losing horizontal size as well as severe horizontal
ringing of the raster, not the image) and expanding vertically and getting dim
(i.e. losing HV and hence blooming). The horizontal drive, on a scope, was
perfectly stable. The waveform at the HOT cathode was showing a current drop
and a phase shift. The waveforms on either side of the horizontal linearity
coil were changing size and phase and showing odd ringing. None of this
depended on presence of signal.

What was really odd is that it was working with an open (to an ohmmeter)
screen resistor on the HOT. The culprit resistor had at some time gotten very
hot, as its markings were obliterated.

Doug McDonald