Bill, I made my own from small audio transformers that I got from Radio Shack. I'd estimate a few US$. Then cut apart an audio cable and wire the primary winding across one set of signal/ground, and the secondary winding across the remaining signal/ground. Wrap with electrical tape to keep from shorting out and to give mechanical strength, and you're done. Made a few of these, with different plugs and jacks on each end. Dave other ----- Original Message ----- From: "Dancing Dots" <billlist1@xxxxxxxxxxx> To: <ddots-l@xxxxxxxxxxxxx> Sent: Tuesday, January 26, 2010 10:43 Subject: [Bulk] [ddots-l] Re: laptop power problems Hi, Steve, What would a good Ground Loop Isolator cost? Regards, Bill Bill McCann Founder and President of Dancing Dots since 1992 www.DancingDots.com Tel: [001] 610-783-6692 -----Original Message----- From: ddots-l-bounce@xxxxxxxxxxxxx [mailto:ddots-l-bounce@xxxxxxxxxxxxx] On Behalf Of Steve Wicketts Sent: Tuesday, January 26, 2010 4:39 AM To: ddots-l@xxxxxxxxxxxxx Subject: [ddots-l] Re: laptop power problems Hi Mark, My lap top was also built for me purely as a music computer. The thing about lap tops is, Some of the circuitry is not insulated that well which can caurse audio noyce. Tthis happens even on expensive lap tops as they are not quite as inserlated as say a PC. It was a high noice I was getting on my lap top, it also would disappear when using the battery power. I simply plut the male phonos from the Ground Loop Iserlater into the audio outs on my Fast Track Pro Sound card then plug the audio cables that go to my mixer into the female phonos on the Ground loop iserlater. I'm almost certain a Ground loop icerlater will work. Try this first before messing with electrics. Steve W ... PLEASE READ THIS FOOTER AT LEAST ONCE! To leave the list, click on the immediately following link: ddots-l-request@xxxxxxxxxxxxx?subject=unsubscribe If this link doesn't work then send a message to: ddots-l-request@xxxxxxxxxxxxx and in the Subject line type unsubscribe For other list commands such as vacation mode, click on the immediately following link: ddots-l-request@xxxxxxxxxxxxx?subject=faq or send a message, to ddots-l-request@xxxxxxxxxxxxx and in the Subject line type faq PLEASE READ THIS FOOTER AT LEAST ONCE! To leave the list, click on the immediately following link: ddots-l-request@xxxxxxxxxxxxx?subject=unsubscribe If this link doesn't work then send a message to: ddots-l-request@xxxxxxxxxxxxx and in the Subject line type unsubscribe For other list commands such as vacation mode, click on the immediately following link: ddots-l-request@xxxxxxxxxxxxx?subject=faq or send a message, to ddots-l-request@xxxxxxxxxxxxx and in the Subject line type faq