[Boatanchors] Heathkit HO-10 Sweep (???) Problem

[wd0x at adelphia.net]

I'm hoping there is a simple solution to a sweep problem (at least I think it's a sweep issue) I'm having with my newly restored Heathkit HO-10 monitor scope. 

I've completely re-capped all of the paper & electrolytics, re-tubed, cleaned and treated pot and switch contacts with DeOxit, and still can't get a steady trace on the CRT with no input to the scope. 

The horizontal sweep control will adjust the "wavy" line trace I get and will eventually speed it up to the point where it is steady (but a bit fuzzy) when the control is full clockwise. 

With the sweep control full CCW, I get a very sharp trace but it resembles a sine wave NOT a perfectly flat line.  It is difficult to get the trace to stop "moving" unless the control is full clockwise. 

When I transmit a steady CW carrier into the scope, the top and bottom of the display are "wavy" NOT flat like I think it should be. 

Any suggestions as to where to look would be appreciated. 73, Bill, wd0x