danajohnhill Posted March 28, 2013 Report Share Posted March 28, 2013 After first being in denial, and then just being annoyed, I need to take action. My beloved 3as, which I received in pristine, unmolested condition in 2010, and for which I made the typical fixes, are now getting a little scratchy in the mids. Just one of them, really. It's the pots, methinks. I brushed away all the green residue with a Dremel back in 2010, and they looked quite clean, but something must have changed. Now, in loud passages, I hear scratchiness. It is not apparent in music for strings, but in solo piano music, or music for flute or French horn, I hear it plainly. It almost sounds like tape distortion, but I know it isn't.So, what think you all? Am I likely to find more green crud on the pots to clean off? Should I have used some sort of something on the pots when I cleaned them to improve contact and resist future corrision? Is it time to think about abandonning the original pots? I would prefer, for reasons I cannot justify, to keep them as original as possible. Lastly, is there any chance that it isn't the pot?Thanks in advance. Link to comment Share on other sites More sharing options...
JKent Posted March 28, 2013 Report Share Posted March 28, 2013 Should I have used some sort of something on the pots when I cleaned them to improve contact and resist future corrision?Yes. Most people use De-Ox-It or dielectric grease. I used the grease, only because it seemed to be more viscous and I figured it would last longer.Kent Link to comment Share on other sites More sharing options...
ar_pro Posted March 28, 2013 Report Share Posted March 28, 2013 Single note piano music (no chords) is an excellent test - be sure to check them at different volume levels, too.If you can eliminate the distortion by adjusting the pots to a "good' spot, then the midrange drivers are probably fine, and re-doing the pots (deoxit is a good idea) is most likely in order.You haven't had any amplifier "mishaps", have you? Link to comment Share on other sites More sharing options...
danajohnhill Posted March 28, 2013 Author Report Share Posted March 28, 2013 Single note piano music (no chords) is an excellent test - be sure to check them at different volume levels, too.If you can eliminate the distortion by adjusting the pots to a "good' spot, then the midrange drivers are probably fine, and re-doing the pots (deoxit is a good idea) is most likely in order.You haven't had any amplifier "mishaps", have you?By "mishaps" do you mean an unexpected power overload? I am using a 100 watt per channel Kenwood receiver. I never play anything at "discoteque levels". Link to comment Share on other sites More sharing options...
ar_pro Posted March 28, 2013 Report Share Posted March 28, 2013 An unexpected overload, as from a suddenly-unplugged RCA cable, dropped stylus, or the like; or some form of amplifier mis-behavior.It wouldn't hurt to check your Kenwood with a pair of headphones, just to eliminate the receiver as a source of the problem. Link to comment Share on other sites More sharing options...
stan461 Posted March 28, 2013 Report Share Posted March 28, 2013 If you haven't done so yet, replace the left speaker with the right and right with left. Link to comment Share on other sites More sharing options...
danajohnhill Posted March 29, 2013 Author Report Share Posted March 29, 2013 Good tips both. I'll try this tomorrow and report back. Link to comment Share on other sites More sharing options...
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