Wow Michael, I had to look up the Radio Shack 22-310 Probe Scope. I must have missed this when it came out. Interesting device. I have a tiny voltmeter probe that looks kind of like that but it’s only a DVM…from the 1980s.

It looks like Hantek has a USB scope probe that works with a laptop for $60.

Snapon diagnostics had some nice automotive scopes when I last looked many years ago. Vantage I think the name was. It was like a slow lcd strip chart recorder in a rugged box. $$$ though.

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79 300TD “Old Smokey” AKA “The Mistake” (SOLD)
82 240D stick shift 335k miles (SOLD)
82 300SD 300k miles
85 300D Turbodiesel 170k miles