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  3. Wednesday, 21 December 2016
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I have an SP5 which sounds like it could do with the Tone-Fusion pot changing. I've had a quick look under the bonnet... er, hood... (sorry) & I can see that it's a small Alpha pot (but that's all I can see). Can anyone tell me the value and type of pot (log or lin) that I will need to replace it with please?.... ...wow, that's a lot of brackets (for a little post)...
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Sheldon Dingwall Accepted Answer Pending Moderation
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What's the issue you're having? On some versions, there is a slight click sound when moving to or past the center position. It sounds like a dirty pot but it's actually a switching noise. This is because we've modified the pot so that there is no load (completely disconnected from the circuit) in the center position.
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  1. more than a month ago
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This has be mentioned to me but not really explained so I’m not 100% sure what I’m supposed to be hearing.

If the strings are ringing and I sweep the pot from one extreme to the other I can hear noise (as if the pot were dirty) all the way around. I can’t hear it when I mute the strings so can I conclude that this is the switching noise you’re referring to? I did clean the pot and I would say that this improved the situation. Prior to that the noise seemed to be more evident at each end of the sweep and now it’s more uniform all the way around. Does that make any sense at all?

Killer guitar by the way. I absolutely love it! This is bass playing day one for me.
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  1. more than a month ago
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That's the thing about switching noise. You only hear it when there is signal flowing through it because of the abruptness of the on/off action. Dirty pots sound dirty both when the strings are moving and when they are muted.
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