Picked up and Admiral 20X122

[kvflyer]

To hopefully make you feel better, I worked on an Admiral 26R12, the exact type of set I had as a kid; first set. It was working fine after replacing all of the paper and electrolytic capacitors. Whilst still on the bench, I heard a loud snap/pop and was unable to locate where it came from. My vertical linearity was now a mess. The height control also had no effect on the picture (glaring clue that I unfortunately didn't pick up on).

Long story short, tin whisker on the height control most likely. Adjusting the control did nothing to the voltage. I cleaned if off with a brush and all was now fixed.

So, all that I can say is, "Welcome to the club".