'50 RCA KCS-47A Question

[jpdylon]

I'm pretty sure its a yoke network problem.

Terry: THe transformer can has two functions, phase and oscillator frequency. THe part of the transformer that's available to adjust on the back panel is the secondary of the transformer. It controls the oscillator frequency (horizontal hold) The primary of the transformer that adjusts from the under side of or underneath the chassis is for the horizontal phasing.

Usually the generic way to adjust it (the sams will tell you) is to pull the hoirz afc tube and adjust the oscillator so that instead of tearing the lines stand upright. Then you adjust the phase so that you can make the picture stand still as possible. When the tube goes back in everything should lock into place.

However, being that your picture looks good apart from the ringing I would leave it be.