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#1
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DISTRESSOR Knob Noise
Has anyone else encountered this?
All of our Distressors seem to be doing this intermittently. When adjusting the the knobs, there's a breaking up crackle that happens. Dirty knobs I suppose? Thanks! |
#2
Posted to rec.audio.pro
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DISTRESSOR Knob Noise
wrote:
Has anyone else encountered this? All of our Distressors seem to be doing this intermittently. When adjusting the the knobs, there's a breaking up crackle that happens. Dirty knobs I suppose? Probably. Give it a squirt of cailube. It'll go away. If it comes back, look for leaky caps. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#3
Posted to rec.audio.pro
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DISTRESSOR Knob Noise
On Mar 11, 3:49 pm, (Scott Dorsey) wrote:
wrote: Has anyone else encountered this? All of our Distressors seem to be doing this intermittently. When adjusting the the knobs, there's a breaking up crackle that happens. Dirty knobs I suppose? Probably. Give it a squirt of cailube. It'll go away. If it comes back, look for leaky caps. --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." Thanks! You're on GS right? |
#4
Posted to rec.audio.pro
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DISTRESSOR Knob Noise
wrote:
Thanks! You're on GS right? On GS? I'm on a vax right now... --scott -- "C'est un Nagra. C'est suisse, et tres, tres precis." |
#5
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DISTRESSOR Knob Noise
A dirty potentiometer is often not so much dirt or debris, but rather silver
sulfide that has developed on the wiper plating. You may be able to effect a relatively long lasting repair if the pots can be disassembled and using a pencil eraser to carefully removed the black, sulfide layer from the wiper. Be careful not to use too much abrasion though, as you may completely remove the plating and the pot will become noisy again very quickly and will be pretty much incurable after that. The easy, albeit tedious fix is to wear the silver sulfide down slightly by exercising the pot back and forth, say a thousand times, and then spray into it with an appropriate cleaner, e.g. Caig D5. Even better would be to replace the potentiometer. If the remedies above don't work, you can look for direct current on the wiper of the potentiometer, which could get into the circuit by way of a leaky transistor or a leaky capacitor. Though less common than silver sulfide, DC on pot wipers can cause really loud and annoying static that, on some equipment, may even present transient voltage levels high enough to damage successive stages of the circuit. To check for this, simply put a DC volt meter or if your like me, your trusty digital scope on the circuit to see what's going on. Good luck~! Skler wrote in message oups.com... Has anyone else encountered this? All of our Distressors seem to be doing this intermittently. When adjusting the the knobs, there's a breaking up crackle that happens. Dirty knobs I suppose? Thanks! |
#6
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DISTRESSOR Knob Noise
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#7
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DISTRESSOR Knob Noise
"Rob Reedijk" wrote ...
wrote: Has anyone else encountered this? All of our Distressors seem to be doing this intermittently. When adjusting the the knobs, there's a breaking up crackle that happens. Dirty knobs I suppose? This happened to me. Problem was, the pots are sealed. I ended up replacing the pot as I could not figure out how to unseal it without destroying it. We have been known to drill a tiny hole in the side of components like sealed pots or switches so they could be cleaned/lubricated. Using a very tiny drill (like the ones they use for PC boards) and a "pin vise". Much like they use these days for drilling holes in printer ink-cartridges for refilling. |
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