Amplifier Crackle

Discussion in 'Audio Visual' started by yottie, 21 Jan 2012.

  1. yottie

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    I have a Sony Legato Linear amplifier (OK it's very old like me !) which has developed a crackle now and again. This seems to originate from the volume slider. Was wondering if there is a fix for this, I think I recall a spray to tackle it from the outside, if not is it possible to dismantle the case etc.
     
  2. Sam Gangee

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    For decades I've sprayed WD-40 inside and it works fine.
     
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  3. ChrisFrost

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    I'd definitely go with dismantling the case before you start spraying anything inside an amp. You want to get the fluid where it's needed rather than missing and just making a horrible gunky mess.

    Contact Cleaner (A.K.A. switch cleaner is the stuff you want)
     
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  4. Sam Gangee

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    He said it's a slider so it's easy to squirt WD-40 inside the potentiometer. Use it sparingly. No dismantling required. Should be good for a few more years.

    I wouldn't use switch cleaner. It will remove all lubrication and make it worse in the long run. I don't even use it for cleaning switch contacts. They really need a film of grease or oil to prevent oxidation.
     
  5. wotan

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    In the past I have cured crackling volume controls, by dismantling and rubbing a soft pencil over the tracks, worked a treat.

    Wotan
     
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  6. yottie

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    Many thanks Sam......WD40 works a treat !!

    ADOPT,ADAPT,IMPROVE
     
  7. timtheenchanter

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    whats wrong with a switch cleaning lubricant then?

    [​IMG]

    works well for me, I use this, and just normal IPA for other, non lubracative (is that even a word) , uses (which is all "switch cleaner" seems to be anyway
     
  8. yottie

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    I think I've used switch cleaner on this in the far past but as I can't find it at the moment I've used WD40 (which every-one has to hand !), it really has sorted the problem.
     
  9. Sam Gangee

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    It's probably fine but it's generally not available locally (unless you have a "Maplin's" store nearby) so it's going to cost you between £3 and £5 plus postage. WD-40 at around the same price, dependent on can size, tends to be easier to obtain locally and most people have a can at home. It contains a petroleum based degreaser and a light oil.
     
  10. yottie

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    A local £ shop sells small aeros of WD for.....guess how much !
     

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