Heathkit IO-103 oscilloscope

[pchilson]

Thanks guys! I'm about to jump back in a see if I can get the trimmers working smoother.

[pchilson]

Went through the calibration procedure. Then went through it again from the start to get it as dialed as I could.
Spraying the trimmers didn't really help them. Seems more of a circuit imbalance (resistor drift?) than the trimmers cause the trimmers on the horizontal amp/sweep generator board did dial in very smoothly and easily.
Now that I understand the workings of the circuits better I may go back and see if I can balance out the vertical amp but for now it is working very nicely.

[52 Bill]

Great job! Another one saved from "bad power transformer" syndrome.

Went through the calibration procedure. Then went through it again from the start to get it as dialed as I could.

That's the good thing about buying Heath equipment, the manuals will always help get it fixed.