Charles218 Posted July 29, 2009 Report Share Posted July 29, 2009 My son and I are working on several pairs of AR Speakers and we are having problems with the tweeter on one of the 4X's. We have twice cleaned the pot, using a Dremel and Deoxit until it looks clean and shiny, and yet the tweeter still works intermittently. I have found that I can push, not turn, the level control in and hold it there and the tweeter works. As soon as I let go it stops working. There is just enough play in the level control to allow me to push it, something like 1/8 of an inch. Any suggestions on what could be the underlying problem? I've only come up with the thought that the springy plate that rotates against the spring in the pot may need to be bent to make a stronger contact.Charles Link to comment Share on other sites More sharing options...
genek Posted July 29, 2009 Report Share Posted July 29, 2009 There is just enough play in the level control to allow me to push it, something like 1/8 of an inch. Any suggestions on what could be the underlying problem? I've only come up with the thought that the springy plate that rotates against the spring in the pot may need to be bent to make a stronger contact.There should definitely not be that much play in the level control. Try bending the contact, but be very gentle because it's thin and old. Link to comment Share on other sites More sharing options...
Charles218 Posted July 30, 2009 Author Report Share Posted July 30, 2009 There should definitely not be that much play in the level control. Try bending the contact, but be very gentle because it's thin and old.Gene,I may give that a try, however when I had it apart for cleaning I was a little nervous about unsnapping it from the piece that it is attached to. It really does look and feel fragile. I think that I will give it a couple of days and see if anyone else chimes in with other suggestions.Thanks!Charles Link to comment Share on other sites More sharing options...
johnieo Posted July 30, 2009 Report Share Posted July 30, 2009 I was a little nervous about unsnapping it from the piece that it is attached to.??? Usually, it falls free! It might be stuck. It is made from phosphor bronze and is rather springy; bend its tips toward their contacting surfaces. Yours may have been over heated, causing it to loose shape and adhere to the plastic insert. The wiper will not make good electrical contact without sufficent spring tension (and clean tips).Cheers,John Link to comment Share on other sites More sharing options...
RoyC Posted July 30, 2009 Report Share Posted July 30, 2009 Sometimes the wiper tip is so corroded that a small hole will develop. Whatever the case may be, the wiper should be removed and examined. It is the most likely culprit.Roy Link to comment Share on other sites More sharing options...
JKent Posted August 1, 2009 Report Share Posted August 1, 2009 How bout a closeup? Here is a set taken apart for cleaning.If yours are shot, you can replace them with L-pads from PartsExpress or Madisound, or I have some Ohmite pots for sale but they are a pain--the backs are open and you have to fabricate some sort of shield to keep the fiberglass out. L-pads work great and never corrode.Good luckKent Link to comment Share on other sites More sharing options...
Mot Posted July 21, 2011 Report Share Posted July 21, 2011 How bout a closeup? Here is a set taken apart for cleaning.If yours are shot, you can replace them with L-pads from PartsExpress or Madisound, or I have some Ohmite pots for sale but they are a pain--the backs are open and you have to fabricate some sort of shield to keep the fiberglass out. L-pads work great and never corrode.Good luckKentMy first post.Hello Kent, Many Thanks to you and everyone here! With information I gathered here (and at audiokarma) I was able to rehab a pair of AR-4x's. It has been a very satisfying experience... and I'm now working on a pair of AR-2ax's. Are you still selling some Ohmite pots? If so, I am very interested in buying them. Link to comment Share on other sites More sharing options...
JKent Posted July 21, 2011 Report Share Posted July 21, 2011 My first post.Hello Kent, Many Thanks to you and everyone here! With information I gathered here (and at audiokarma) I was able to rehab a pair of AR-4x's. It has been a very satisfying experience... and I'm now working on a pair of AR-2ax's. Are you still selling some Ohmite pots? If so, I am very interested in buying them.I may only have 2 left. Will check. I highly recommend L-pads in the AR 2ax and others.Kent Link to comment Share on other sites More sharing options...
Mot Posted July 21, 2011 Report Share Posted July 21, 2011 I may only have 2 left. Will check. I highly recommend L-pads in the AR 2ax and others.KentThanks Kent.When I rehabed my 4x's, I was unable to bring the original pots back to life. While researching an answer to the problem, I stumbled across a pair of Ohmites on eb@y. Long story - short... I fit them in... shielded them from the fiberglass... and they are really working great.Now, while working on my 2ax's, I can only get the original pots to work intermittently. I know the Ohmites are not easy to work with... but I'm so happy with the way the 4x's turned out that I am determined to make them work in this pair as well.Thanks again for helping to make this site such a wonderful resource.Mot Link to comment Share on other sites More sharing options...
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