Heathkit IO-102 Oscilloscope


The Heathkit IO-102 is a transistor based oscilloscope. I replaced the electrolytic capacitors and some transistors that were very temperature sensitive and caused the unit to drift badly. This unit is used regularly on my test bench. I built one of these from a kit many years ago, but not this one.

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2 thoughts on “Heathkit IO-102 Oscilloscope”

  1. Eric says:

    Hi there. I just acquired the same model, and am excited to get it working. It powers on fine, but all I get is a large green dot on the screen, and not a line. I tried fiddling with all the knobs, but nothing seems to work. Do you have any pointers for me where to start looking? Thanks in advance!

  2. DLandon says:

    Download a manual and see if that doesn’t help.

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