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FDP Forum / Fender Guitars: Stratocasters / Tone volume knobs , electrical noise at 0 setting



Mar 26th, 2018 01:46 PM   Edit   Profile  

Hi, just noticed my volume and tone knobs emit an electrical buzz , like touching a cable plugged into amp . But less so and not as bassey.

Not sure if it did this before , recently dropped it onto s hardwood floor ..

Any ideas ?


Contributing Member

UNpopular music

Mar 26th, 2018 03:25 PM   Edit   Profile  

When do they buzz?

- Only when touched (are they metal?)?

- Only when rotated?

- All the time?



Mar 26th, 2018 04:53 PM   Edit   Profile  

On,y when they are turned to zero, can be any one of the tone knobs or volume.
Standard plastic knobs and wiring on CP60s Strat.

Contributing Member

UNpopular music

Mar 27th, 2018 08:40 AM   Edit   Profile  

Does the noise happen even when your fingers are on the strings? If so, it may be a broken string ground. Get out your meter and check for continuity across the bridge plate and the output jack plate.

You should get a beep. If your meter doesn't have a continuity beep, set to read Ohms. Continuity at .01 Ohms or less is a dead short, and that is what you want.

If there is no continuity, remove the rear cover plate and see if there's a little black wire soldered to the spring claw; there should be one there. This is the string ground, and that connection uses the capacitance from your body as a noise filter.

If the wire is there and connected, and you have no continuity between the bridge and jack plate, the string ground's connection at the other end of the wire (under the pickguard) has become disconnected.

If you do have continuity, then something else is going on. Do you have a noise source, like a TV or other electronic item with an AC power supply close to your guitar, amp, or cables/pedalboard? If so, keep them separated.

(This message was last edited by Peegoo at 11:54 AM, Mar 27th, 2018)

Contributing Member


I say stuff
Mar 27th, 2018 08:44 AM   Edit   Profile  

I had a MIM Strat years ago (it was a ‘99) that had this issue. Turned out that reflowing the soldier on the ground wire connection the the spring anchor (claw) in the back of the guitar fixed it.

Bad ground.

The guitar sounded better in general after I fixed it.

(This message was last edited by Leftee at 10:46 AM, Mar 27th, 2018)

FDP Forum / Fender Guitars: Stratocasters / Tone volume knobs , electrical noise at 0 setting

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