Jackson active pickups buzzing

[carfish7]

I dropped a set of the J200 stacked singles with the mid-boost circuit into a Model 1A. I deleted the ground wire that goes to the trem claw and there is a buzz that mostly goes away when I put my hands on the 5-way switch screws and completely vanishes when I also touch the strings.

I know the EMG stuff doesn't use the string ground, but does anyone know if the Jackson system needs the string ground at the claw?

Thanks in advance for the assistance.

Z

Edited to add that while the preamp uses a battery, I suppose the pickups themselves are indeed passive.

[murkat]

yes, needs to be grounded, unlike emgs(preamp circuit inbedded in each pickup housing).

yes, Jackson pups are indeed passive, it is just a preamp add on, like any other.

[carfish7]

That took care of it - thanks!

Man, these J-200's sound really good, and the boost is quite tasty....................

Dead silent, too.