Loss of battery power pre amp Stingray 5

Loss of battery power pre amp Stingray 5

Hi,
In 1991 I bought a pre owned Musicman Stingray5 bass.
Played it in a band for 5 years and in church later on until today.
In 2020, during a reheasal, I suddenly lost my sound and when touching the jack plug got a loud bang from the speakers.
It was then for the first time I discovered that my Stingray had its power supply for the pre amp switched thru an extra contact in the jack socket.
Closer investigation showed that the contact deforms and gets to a point that it looses contact at…

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Source: http://forums.ernieball.com