Monitor deflection magnets; what to do when one falls out & breaks?

Brad> Hi, Brad> I have an old B&W "specialty" monitor which recently stopped Brad> working. In the process of moving it around (to/from repair Brad> place) I noticed a little black "tube magnet" dropping out when Brad> I took the cover off. Brad> So, I notice where the missing magnet came from. Naturally Brad> it's on the top side of the yoke assembly. Brad> But - the "tube" has broken into 3 pieces (it was broke when I Brad> found it. honest). I carefully glued it back together (no Brad> glue in the joints, however) and replaced it. This helped a Brad> little but did not cure the problem. Brad> [note to reader: I never took that fields course. I know Brad> nothing of magnets.] Brad> So, Brad> - is a broken magnet pushed back together not as good as a Brad> whole magnet? (strength wise) Brad> - can I get a new magnet somewhere? Brad> - is there anything special about these magnets? It's probably not a magnet, but rather a ferrite core. You'd know the difference putting the pieces together -- if you feel no attraction or repulsion, it's not a permanent magnet. A broken & repaired one is just fine so long as the gaps are tight. If you create an airgap -- with or without glue -- that will change the characteristics. For a repair like that I'd consider the thin (not gap filling) superglue. Brad> - do normal monitor repair guys just have a box of these laying Brad> around? Maybe, but it wouldn't necessarily fit. Brad> - does this sort of thing happen all the time? It's never happened to me... As for the problem, I wonder if the issue is that the core is in the wrong spot. It's part of the deflection magnetics assembly, and if it's misplaced then you'd certainly get problems like you describe. Take a look at the corresponding piece at the bottom of the yoke. I would expect things to be symmetric. The fact that the thing fell out suggests that it may have been out of position, and when you pushed it back in you may not have gotten it back where it actually belongs. paul