[Heathkit] SB-620 Question

[Kenneth G. Gordon]

On 26 Apr 2008 at 12:02, Dan Pividal wrote:

> Have an SB-620.
> Went through alignment process as per manual.
> Problem is I have more vertical deflection on left hand side of scope
> than on right of center line. Also, if I move the vertical position
> control on the back of the scope the base line goes off horizontal
> after it goes up over half way. At the top it is at a position that is
> going from 10:00 to 4:00. I am sure this is related to the first
> problem. The manual does not refer to this problem in the trouble
> shooting section. Trace is nice and sharp and bright as is the pip.
> Has anyone had this problem in the past before I take out the meters
> and start to look for the problem? Could save me some time. Thanks in
> advance. Dan/N4VET 

Look for non-linearity in the sweep circuit. Bad cap or 
resistor out of spec.

At least that is the first place I would start looking...

Ken W7EKB