Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83 v7 ucbtopaz-1.8; site ucbtopaz.CC.Berkeley.ARPA Path: utzoo!watmath!clyde!burl!ulysses!mhuxl!houxm!houxz!vax135!cornell!uw-beaver!tektronix!hplabs!zehntel!dual!amd!decwrl!decvax!ucbvax!ucbtopaz!newton2 From: newton2@ucbtopaz.CC.Berkeley.ARPA Newsgroups: net.audio Subject: Re: Installing a Varistor Message-ID: <522@ucbtopaz.CC.Berkeley.ARPA> Date: Wed, 8-Aug-84 03:34:41 EDT Article-I.D.: ucbtopaz.522 Posted: Wed Aug 8 03:34:41 1984 Date-Received: Sat, 11-Aug-84 03:38:30 EDT References: <582@uofm-cv.UUCP> Organization: Univ. of Calif., Berkeley CA USA Lines: 6 It's unlikely a varistor will help deal with RFI, whether conducted or radiated, from a universal motor. Try experimenting with the physical arrangement of power cords on the audio equipment, with lifting some AC power grounds, or with other ground-loop breaking approaches. Shielding (foil) may help in the less-likely event that the interference really is radiated rather than power-line conducted. Remember that AC power cords make effective antennas (they're actually used for such in radios). Good luck with a frustrating and elusive problem.