Buzz in my signal

[musicman724]

I wasn't sure where to post this question so I thought I would start here. I have a Fender Jazz and I have installed a Sadowsky Preamp in it. Some places I play at I get a ground buzz from the bass. I generally run the bass through my pedal board and I use a Eden World Tour Preamp/DI to send my signal to the console. I have also had the same buzz running the bass direct into various DIs (Countryman, Radial, Whirlwind and even a Presonus tube pre). The only thing I can try to do is always keep my hands on a string or two at all times. It doesn't do this in every venue, but I want to know if there is a solution for the ones the bass generate the buzz.

 

[countrybass007]

I've gotten this off of neon lights in close proximity to the stage. Also, there may be a grounding problem at some of the venues. The last gig we played I was getting a little buzz from my amp when I was facing it, once I turned forward it stopped.