Guest sssand2 Posted November 1, 2006 Report Share Posted November 1, 2006 All,I have recently been restoring a friend's AR2axs with later serial #s (all are above 282,700). I had completed my restoration (refoam, recap, and cleaning the pots) and was playing them to verify everything was working ok. Both worked until yesterday when the woofer on one stopped producing sound. I did some troubleshooting and found what I believe may be a bad coil (inductor). I tested continuity from one side of the coil to the other and did not have continuity. Is this indeed an indication of a bad coil and, if so, where would I be able to source a suitable replacement? I believe the coil is a no. 7. Thanks!Steve Link to comment Share on other sites More sharing options...
johnieo Posted November 2, 2006 Report Share Posted November 2, 2006 Hello:The insulation on magnet wire is only 0.0004 inches thick. Some is transparent (Teflon) and not easy to see or remove. It is possible that the insulation was not scraped from one end of your coil before it was resoldered. A scalpel or Xacto knife works well. A CSP member suggested this recently as a possible solution to a simlarly-described problem.cheers, Link to comment Share on other sites More sharing options...
Carlspeak Posted November 2, 2006 Report Share Posted November 2, 2006 >All,>I have recently been restoring a friend's AR2axs with later>serial #s (all are above 282,700). I had completed my>restoration (refoam, recap, and cleaning the pots) and was>playing them to verify everything was working ok. Both worked>until yesterday when the woofer on one stopped producing>sound. I did some troubleshooting and found what I believe may>be a bad coil (inductor). I tested continuity from one side of>the coil to the other and did not have continuity. Is this>indeed an indication of a bad coil and, if so, where would I>be able to source a suitable replacement? I believe the coil>is a no. 7. Thanks!>>SteveIf John O's suggestion doesn't work out, you can get a new one that's pretty close for mH and DCR ratings from Parts Express. They have a 1.8 mh, .42 ohm, 15 ga. wire air core inductor for about $10. Tom Tyson's inductor table says a #7 inductor spec. is 1.88 mh and .58 ohms.IF you want an exact replacement, try a used AR parts supplier or wind you own. It's not that hard.Remember, it's all about the musicCarlCarl's Custom Loudspeakers Link to comment Share on other sites More sharing options...
Guest sssand2 Posted November 2, 2006 Report Share Posted November 2, 2006 >Hello:>>The insulation on magnet wire is only 0.0004 inches thick.>Some is transparent (Teflon) and not easy to see or remove. It>is possible that the insulation was not scraped from one end>of your coil before it was resoldered. A scalpel or Xacto>knife works well. >>A CSP member suggested this recently as a possible solution to>a simlarly-described problem.>>cheers, John,This is exactly what happened. I had cut off the old eyelet and put a new one on when I changed the caps. I didn't know about the coating, so I didn't scrape it off. Thanks!Steve Link to comment Share on other sites More sharing options...
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