CTC185, what's a safe way to start it ?

Wire a 100W lightbulb in series with the set and turn it on. The bulb will limit the current.

I've had a lot of these (with 25 or 27" tubes) start normally, then arc from the top of the flyback to the core, immediately smoting the HOT and regulator.

I think on these chassis you can jump the regulator out and run it on a variac to give approx B+, and use a sacrificial HOT from a junker. If it blows the horiz out again, it won't damage the regulator. If it runs, try waving a HV probe around the top tower of the flyback to see if you can draw an arc. If you can locate the pinhole, you can RTV it shut. There should be more than enough room between the tower and core to insulate it.

John

Hi...

Just from curiousity, John, why not rtv the whole durned flyback on general principle?

Take care.

Ken

Thank you for this very good info ! There seems to be a small hole on top of the Flyback with lots of burn marks around it. I think a new Flyback would guarantee a permanent fix. Has anyone used RTV without getting call backs ?

moonlite

Thank you so much ! I think that's what I'll do. These parts aren't expensive these days after all.

moonlite

Thank you so much ! I think that's what I'll do. These parts aren't expensive these days after all.

moonlite

Thank you so much ! I think that's what I'll do. These parts aren't expensive these days after all.

moonlite