Guest thebluecrocodile Posted January 15, 2006 Report Share Posted January 15, 2006 I need to rewind the voice coil on a 2ax woofer (dated 1966) as the old one burnt up long before I got the speakers. I measured the diameter of the wire at .010 (AWG 30) but since the coil was such a mess I am unable to determine the number of windings on the voice coil. Does any one have any experience with this (the total length of 30 AWG to do this rewind would also work). Many Thanks, Rob Link to comment Share on other sites More sharing options...
tysontom Posted January 16, 2006 Report Share Posted January 16, 2006 >I need to rewind the voice coil on a 2ax woofer (dated 1966)>as the old one burnt up long before I got the speakers. I>measured the diameter of the wire at .010 (AWG 30) but since>the coil was such a mess I am unable to determine the number>of windings on the voice coil. Does any one have any>experience with this (the total length of 30 AWG to do this>rewind would also work). Many Thanks, RobRob,You would be much better off trying to locate another woofer on eBay than to go back and re-wind a voice coil. It is a daunting task, not unlike re-inventing the wheel. You really need to be able to bake the windings with a special glue, and the voice coil should be wound on a "coil winder" in order to get the windings even and uniform (so they don't drag in the gap), but if you insist, here goes:AR-2 Alnico Woofer (1957-1969):DC Resistance = 5.5 ohmsInductance (voice coil stationary) = 1.7 mHForce/Ampere = 1.43 lbs/ampTotal number of turns = 120Flux in gap = 9,500 gaussTotal weight of assembly = 3 lbs., 1.5 oz.Coil former = phosphor bronzeCoil outside diameter = 1.340 inchesCoil length = .656 inchesgap inside diameter = 1.277 inchesgap outside diameter = 1.377 inchesgap clearance = 0.100 inchesGood luck!--Tom Tyson Link to comment Share on other sites More sharing options...
dynaco_dan Posted January 16, 2006 Report Share Posted January 16, 2006 >>I need to rewind the voice coil on a 2ax woofer (dated>1966)>>as the old one burnt up long before I got the speakers. I>>measured the diameter of the wire at .010 (AWG 30) but since>>the coil was such a mess I am unable to determine the number>>of windings on the voice coil. Does any one have any>>experience with this (the total length of 30 AWG to do this>>rewind would also work). Many Thanks, Rob>>>Rob,>>You would be much better off trying to locate another woofer>on eBay than to go back and re-wind a voice coil. It is a>daunting task, not unlike re-inventing the wheel. You really>need to be able to bake the windings with a special glue, and>the voice coil should be wound on a "coil winder" in order to>get the windings even and uniform (so they don't drag in the>gap), but if you insist, here goes:>>>AR-2 Alnico Woofer (1957-1969):>>DC Resistance = 5.5 ohms>Inductance (voice coil stationary) = 1.7 mH>Force/Ampere = 1.43 lbs/amp>Total number of turns = 120>Flux in gap = 9,500 gauss>Total weight of assembly = 3 lbs., 1.5 oz.>Coil former = phosphor bronze>Coil outside diameter = 1.340 inches>Coil length = .656 inches>gap inside diameter = 1.277 inches>gap outside diameter = 1.377 inches>gap clearance = 0.100 inches>>Good luck!>>--Tom TysonHi Tom;You are such a wealth of factual archival information, thank you. Link to comment Share on other sites More sharing options...
Guest thebluecrocodile Posted January 16, 2006 Report Share Posted January 16, 2006 Wow. That is good info. Very much appreciated. By the way, I agree with you that the task is a tough one. Unfortunately, I just can't resist the challenge. Link to comment Share on other sites More sharing options...
Guest MPPurcell Posted January 16, 2006 Report Share Posted January 16, 2006 Would love to hear how this one comes out. Please let us know.Michael Link to comment Share on other sites More sharing options...
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