[Heathkit] SB-620 Question

[Edward B Richards]

I have had similar problems. Turned out to be leaky capacitors to the
deflection plates, .1 mfd in my case. Just replace them GP. If not bad,
still good preventive maintenance. Good luck.

Ed  K6UUZ
 
On Sat, 26 Apr 2008 12:58:49 -0700 "Kenneth G. Gordon"
<kgordon2006 at verizon.net> writes:
> 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
> 
>