Pre amp JP6

Pre amp JP6

Hello,
I have a customer who cam in with a MM JP6 s# G30379.
Piezo system is constantly making an irritating noise. It is kind of sizzling just like a bad tube in an amp – it is very annoying and renders the system useless.
The system works other than that – except the contacts in the batt box need to get bend upward to create a good contact. That is not the cause of the problem though.
I suspect we need a new preamp.
What do you think and how to get a preamdp. I live in Denmark.
Br Greg

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