Their web site address is: http://www.emcohighvoltage.com/ (thanks for the pointer on that one Rich.) I have also been contemplating building a hi-pot tester using an EMCO E101 module. 73 bill, w4whw ----- Original Message ----- Sent: Thursday, April 18, 2002 3:46 PM Subject: Re: [Amps] Hi pot tester > Can you give us the Emco web site URL, please? I used google and got a > building materials company.