IO-21 scope problem

[Mark Graalman WB8JKR]

 You didn't mention for sure if the sweep was working or not, but
I would check the pots, resistors, and caps associated with the
positioning controls. A monitor of the various supply lines off the
power supply would be in order as well to make sure its not
changing a great deal with warm up.


73,  Mark  WB8JKR


On Fri, 18 Jul 2003 21:18:04 -0700 George Yazzolino <Kc7hkp at TELEPORT.COM>
writes:
> Hi Guys
> I have a heathkit IO -21 scope. when i first turn it on the Spot
> last only
> for a couple of seconds and drops of to the lower right hand side. I
> can not
> do any adjustment on the front panel controls to bring it into
> view.!
>
> not sure where to start to look for the problem.....any ideas
> ?.....Tube or
> resistor or cap out of spec maybe ?
>
> thanks
>
>
> P. George Yazzolino
> 14801 NE 20 Circle
> Vancouver, WA.  98684
> KC7HKP...Grid CN-85

-----------------------------------------------------------
This list is a public service of the City of Tempe, Arizona
-----------------------------------------------------------

Subscription control - http://www.tempe.gov/lists/control.asp?list=HEATH
To post - HEATH at LISTSERV.TEMPE.GOV
Archives - http://interactive.tempe.gov/archives/HEATH.html