Questions - Setting up a SRAM board in S-100 / Altair system?

Chuck & All, On Fri, Sep 5, 2014 at 4:23 PM, Chuck Guzis <cclist at sydex.com> wrote: You'll have to look up a bit for the answer. The chassis most certainly +does+ have a 3-wire cord, and it's properly connected. Thing is, I live in a really old house (for the USA, anyway) and it turns out that one of the circuits that's near my workbench doesn't actually have a ground wire - and it turns out that's the circuit which was being used to power the Variac which in turn powers the Altair. I only discovered this issue last week, in the process of working on the Altair, when I felt that tell-tale buzz on my fingertips as they happened to lightly graze the chassis at one point. Same feel you get from a vintage amp with a 2-wire cord and an AC line bypass to chassis.. the so-called "Death Cap", in the lingo of some guitar doofuses who don't seem to grasp the concept of impedances, and how little current that 50-100nF cap can actually pass through the resistance of a human body at 60hz. But it did make it easy to measure the leakage current.. just connect the ammeter from chassis to the ESD ground jack on the bench. Until I move it to a new circuit, I've got a heavy-duty clip lead tying the Altair chassis to that same ESD ground jack.