Stumped with HUM

ErictheRed

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Soo, obviously, it's NOT the guitar, right? Bad cable, bad effect cable, bad amp. Most likely the main cause.
Not necessarily, two guitars could have poor wiring. If he unplugs the guitar and the hum is still there, THEN it's definitely not the guitar!
 

jonesy

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It's fairly common for the buzz or hum to stop or get quieter when you put your hand on the strings. That just means the bridge ground wire is working.

Test guitar with really clean amp setting at lower volume and if it hums then chances are you have short. Put your hand on the strings and if it still hums you have a really bad short.

A little bit of noise from lights, pc, heaters, power source etc can cause problems. Make sure your outlets are properly grounded.

Trouble shoot the cause by using "deductive reasoning"... (The Sherlock method..lol)

1. Does it buzz in all 3 switch positions? Then it's most likely either switch or output jack or cable.

2. Does it just buzz in neck or bridge only? Then it could be bad pot or one side of switch is faulty or even a bad pickup lead.

3. Use a multimeter to test pots and pickups to see if readings are normal.

4. Test switch with meter to see if it has any shorts or grounding issues.

5. Replace parts that are suspect until you have solved the problem.

You need to go down the check list and rule out what is NOT causing the problem until you find what is.

Hope that helps,

Jonesy
 


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