On Wed, 22 Mar 2006 01:14:56 GMT, "Scrim" wrote:


Hi,
What kind of tube problem would cause an intermittent blurring in only the
horizontal plane?
Isn't this most likely an intermittent fault somewhere in the electronics?
Scrim


There's a large HV resistor in the electron gun which can fail. This
causes all sorts of strange problems. I saw one that was physically
cracked once. It would go out of focus and snap back into focus.
It's also possible for arcing, or leakage around the focus grids to
cause intermittent focus. These CRTs use separate horizontal and
vertical focusing grids, so it's not unusual for them to go out of
focus in one direction only.
Andy Cuffe