need help identifying source of Noise....

[jcalo]

I've recently discovered a strange noise coming from my Bass(Pensa J-4 Active and passive). After having it plugged in for about 2-3 minutes it starts to make a noise very similar to the sound that one would hear dialing between radio stations i.e. pure white noise,static,etc. If I take it out of the active phase the noise stops but will continue again when I place it back into the active phase. Could this possibly be related to a faulty switch or pre amp? It's something that obviously takes time to warm up and then act up. Any clues would be much appreciated. Thanks

 

[ErebusBass]

Sounds like a dead battery, Jim. That's also the easiest and cheapest thing to fix/best thing to do first.

 

[jcalo]

I tried a new battery as first line defense however,no luck. Thank you anyway for your reply.

 

[jcalo]

It did make me think about the possibility of the new battery not being up to snuff. Where do you guys store your 9 volt batteries? I've been keeping mine in the bass case. Maybe that's not the best place???