Aug 19, 2018 · Hello there, A variac is a transformer with variable secondary winding turns. That means the applications are almost endless. Since in it's main uses it lowers power to AC …

Dec 27, 2017 · Variacs are not isolated from earth. The variac pictured can put out 130V ac, referenced to earth ground. An isolation transformer is not referenced to earth making circuits …

May 9, 2011 · I cleaned the variac with an eraser, didn't seem to make much difference, looking at the contacts it looks like the silver coating has been worn off and it's down to the copper wire, …

It's worth realizing that "Variac" was the trademarked name of a product by General Radio (that eventually became a catch-all term; " Vari able A.C.), while "Powerstat" is likewise a product …

May 13, 2016 · I was in my teens some 40 years ago and somehow managed a 3A Variac for free and a 1 KW isolation transformer for like $10.00. I added an Analog voltmeter and ammeter as …

Dec 23, 2019 · The part that appears to be a plain carbon brush on a variac brush is a special type of material -anisotropic graphite- that if goes bad; would need replacement, I doubt …

Feb 24, 2020 · Should I get a single output isolation transformer or a Variac that has isolation built in (i've provided some links below)? Also, I've read that you want to put the UUD (Unit Under …

Jan 6, 2020 · A couple of things to note, make sure the variac has sufficient VA rating to supply the power you'll need and think about interlocking and fusing your setup so that hands cannot …

Jun 15, 2016 · OK, I have completed my duel variac project as seen here. Each one works fine on its own, complete with amp and voltmeters, switch and fuse. Truth is I haven tgotacluehow → …

May 8, 2017 · Hello! I'm building "isolation transformer+variac+dim bulb tester combo" according to plans in attached pictures (from "Mr Carlson's Lab" YT channel - It's gonna be enclosed in …