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Mysterious pickup/preamp problem - Yamaha RBX765a


MacGarnicle

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If anyone has come across this problem before, any help would be appreciated:-

 

A few weeks ago my Yamaha RBX765a (active preamp) cut out during a show (right before the "bass solo" section of a song - Murphy's Law in action). The signal didn't disappear altogether, rather it became VERY weak.

 

The next day I played the bass and everything was fine. I was unable to replicate the problem. I checked for loose contacts in the control cavity and mucked around with different batteries, leads etc. but couldn't find anything.

 

This morning I was playing at home and the same thing happened when I was really digging in on the B string. Touching the string on the pickup seemed to turn the condition on and off (unreliably) but now the bass is fine again and I can't replicate the problem.

 

If anyone has had a similar experience and found the problem and/or solution please let me know.

 

I will change the battery this morning but I would like to hear any other ideas in case I

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