Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site crystal.ARPA Path: utzoo!watmath!clyde!floyd!vax135!cornell!uw-beaver!tektronix!zehntel!hplabs!hao!seismo!uwvax!crystal!bill From: bill@crystal.ARPA Newsgroups: net.video Subject: Re: Cleaning heads Message-ID: <320@crystal.ARPA> Date: Sat, 3-Mar-84 14:52:40 EST Article-I.D.: crystal.320 Posted: Sat Mar 3 14:52:40 1984 Date-Received: Mon, 5-Mar-84 00:25:30 EST References: <1673@iedl02.UUCP> Organization: U of Wisconsin CS Dept Lines: 33 >There is good reason that video heads are >less likely to need cleaning than audio cassette heads. The audio >tape players heads actually have a small gap which a field is >applied or detected which can become jammed with shedding oxide. >The video players have no such gap (or maybe the gap is filled >by a non-magnetic material, I can't remember). Thus, the heads >are much more resistant to picking up garbage and need much >more infrequent cleaning. Audio tape recorder heads have the same kind of gap as video heads, as far as I know (my experience is only with audio recorders). The 'gap' on audio heads is filled with a non-magnetic material. Oxide shed from audio tapes varies quite a bit; first-quality tapes generally have little shed. I would guess that video heads need cleaning much less often because the spinning motion would make them somewhat self-cleaning (??). For audio recorder heads I use either isopropyl alcohol or a spray can of Freon TF (extremely pure versions are available for head cleaning). My can says Rawn Chemicals TF Tape Head "no residue" cleaner ..no residues, low surface tension, high density and high dielectric strength...safe for all electrical insulations, coatings and elastomer parts. Rawn Company, Inc, Spooner, WI 54801 This is a low-force spray can. I have used FreonTF for all sorts of electrical and electronics cleaning and have been very happy with it. bill cox bill@uwisc ...seismo!uwvax!bill