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RCA Magnetic Focus Issue
I have an RCA set with a KCS47 chassis that I've been working on. This is the first set I've had where I encountered a mechanical magnetic focus system. After my initial recap and general clean up I brought the set up on a variac and it had a nice bright raster. The focus didn't look too bad, but it was very hard to adjust. There was a lot of "gunk" on the metal sleeve that slides back and forth on the neck of the crt (16GP4) to adjust the focus. I decided to remove the magnet/focus assembly and clean it. The magnets are all glued in position on one end so they were not disturbed. I cleaned it up and put it back together. BIG SURPISE.....the focus is terrible now and adjusting the control does little or nothing to help. I've tried just about everything I can think of, but the focus is quite poor now.
I saw another thread on AK regarding another set with this same issue and the solution seemed to be to remagnetize the three magnets. Problem is....the specific instructions for doing so are kind of vague and I don't have access to a high amperage 24 volt DC power source.
Just wondering if anyone else has come up against this and found a different solution? Also wondering if anyone has a spare magnet assembly I might buy and try?
The set has a great picture, it's bright and stable, but very blurry.
Attached are a few pictures of the assembly from my set.
Thanks.
Bob
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