Westinghouse K840CK15 Restoration

[etype2]

This is the part we need, a magnetic 6-32 thread “screw” for static convergence. It is one of three and I believe it is the same assembly as in the Steve D. Photos.



Could this have been used in other RCA early color CRT’s? Any old dead CRT’s out there with this part? A search of the internet failed to find one.

[trinescope]

I would think this kind of part could be made. The magnetic field isn't all that strong (about that of a magnetized screwdriver blade); I'd be more concerned with it being able to not demagnetize easily. This is part of the purity coil assembly, not the CRT itself. It's probably specific to the 15GP22 hardware.

[Pete Deksnis]

Originally Posted by etype2

This is the part we need, a magnetic 6-32 thread “screw” for static convergence. It is one of three and I believe it is the same assembly as in the Steve D. Photos.



Could this have been used in other RCA early color CRT’s? Any old dead CRT’s out there with this part? A search of the internet failed to find one.

An attempt to generate this part was made a dozen years ago. It failed, however, because the magnetic field was much too weak.

Notice also, that there is a screwdriver slot at each end. This is so the item can be removed and inserted backwards to utilize the opposite magnetic pole if and when needed.

Good luck if you try to manufacture them. Donor sets are a protentional source; I had been fortunate to have located some that way.

Pete

[Electronic M]

Originally Posted by Pete Deksnis

An attempt to generate this part was made a dozen years ago. It failed, however, because the magnetic field was much too weak.

Notice also, that there is a screwdriver slot at each end. This is so the item can be removed and inserted backwards to utilize the opposite magnetic pole if and when needed.

Good luck if you try to manufacture them. Donor sets are a protentional source; I had been fortunate to have located some that way.

Pete

I wonder if they were making it by magnetizing a threaded rod or by adding threads to a cylindrical bar magnet? It is hard to make a nail into a strong magnet, but most strong magnets that I've split the pieces all seemed to stay strong...