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Author Topic: Rewinding Changeover Coils John Cain Film Handler Posts: 1 From: Lynnwood, WA Registered: Feb 2000 posted 04-10-2000 09:38 AM                     Does anyone know how many turns of magnet wire are on each side of a changeover coil? I have several to rebuild, and lost the information. Help! Thanks! jmcain@concentric.net  |  IP: Logged John Walsh Film God Posts: 2490 From: Connecticut, USA, Earth, Milky Way Registered: Oct 1999 posted 04-10-2000 12:31 PM                     There's no way to know, unless someone has unwound one and counted. It would be different, depending on the manufacturer, voltage, (AC or DC) etc. If you do some, tell us- it might help someone in the future.  |  IP: Logged Ken Layton Phenomenal Film Handler Posts: 1452 From: Olympia, Wash. USA Registered: Sep 1999 posted 04-10-2000 07:07 PM                     Why not just buy a new changeover coil? You can buy both the Essannay Electric "Zipper" and Weaver changeover coils from Wolk in Chicago. Kelmar coils are basicly a Guardian or Dormeyer solenoid.  |  IP: Logged Pete Lawrence Expert Film Handler Posts: 192 From: Middleburg, PA Registered: Aug 1999 posted 04-10-2000 08:39 PM                     John, You'll find for this application it's not that critical. After all, the coil is on for a fraction of a second at most. I assume there is a bobbin or form the wire is wound on. All you need do is measure the wire diameter and get the right size magnet wire. Then simply fill the bobbin / coilform with about the same amount of wire. Magnet wire tables are available at www.mwswire.com/barecu1.htm and one supplier that will sell small quantities of magnet wire is Mouser electronics ( www.mouser.com ). I've done this for other solenoids in the past with no problems. Pete  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 04-16-2000 12:57 PM                     Most Motor shops will rewind them for a fairly small fee.  |  IP: Logged

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