Westinghouse K840CK15 Restoration

[etype2]

Originally Posted by Electronic M

Cabinet looks nice, but what part of it is beating?

We saw video signals on the scope. Can’t get into it more then that for now.

When we get the new socket, Mike will install it and the plan is still to try to jig this chassis to a 21FBP22 in order to finish the bench work and before installing the 15GP22. He will need to custom make the cables to connect the yoke and crt but most of that is worked out. This will allow Mike to check the voltages in the original electrostatic convergence circuits without actually connecting them to a crt. The picture will be small on the 21FB due to the different deflection angle of the yoke but the picture should be there. Mike is not sure how the different deflection angle is going to affect the angle of incidence through the aperture plate and on to the phosphors. It might not work at all. IF there is enough magnetism in the static convergence magnets of the 21FB, then the beams will bend where they need to in order to do the job since all we really care about is "rough" convergence for now. . It will be a fun experiment to say the least. Plan B is to jig it to a monochrome crt with the proper deflection angle and then patch in the signals (RGB) and Minus wye) "one at a time" to do testing.

Getting close.

Edit: Many thanks to the ETF. My donation sent.