I'm thinking of buying this Admiral

[EdKozk2]

Hi,
I finished up a recap on an Admiral 20X1 chassis a few weeks ago. I was having trouble with horizontal AFC , just like your picture shows. I found the issue in my case, was the horizontal stabilizer coils' adjustment. It is on the underside of the chassis. I had to back (turn) the slug all the way out, to the end of its' travel. This adjustment is on the opposite side of the horizontal frequency control slug.
Make sure you follow the set up procedure in the Sams for the horizontal oscillator adjustments.
I posted a picture with an arrow pointing to the slug adjustment.
Ed