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I started checking resistance on the video amp tube pins and found pin 6 had no continuity so I traced back to the L23 peaking coil and it was open, so I replaced it with one out of an identical parts set and checked it again, it reads 17K and I'm supposed to have 8k but I figured it was better then the original. I turned the set on and now I get a wavy vertical line, see attached pic. It appears I've now lost my Horz sweep, so I disconnected one end of the coil, removed the 12au7 expecting to see a full raster as before but I still had the vertical line. I've got another bright / contrast pot from my parts set and will replace that tomorrow morning just to eliminate that as a probable cause.
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