Hi there! First say hi to everybody...I am new in this forum and my native language is spanish ;-) but i'm gonna try to write in english....i am a professional musician (guitar player) and sometimes (not always) when i come to a new gig (whether a hall or an open air) i have a lot of noise when i turn on my Overdrive,it's a Visual Sound Jekyll & Hyde and my guitar is a Fender StratoCaster 25th Anniversary (1994)....in my pedalboard i have more stomp boxes,in this order:
1-Sennheiser Wireless System EW
2-Peterson Tuner
3-Boss Tuner
4-OVERDRIVE JEKYLL & HYDE
5-Boss Flanger
6-Ibanez Tremo-Vibe
7-Boss Delay DD-20
8-Boss Noise Suppressor NS-2

And i work always with Tube Amps,like Fender,Vox,MArshall or MesaBoogie

The last time i had so much noise that,even,with the Noise Suppressor at maximum level,it was impossible to reduce the noise,but..the next day playing in another place,no noise coming from the guitar...so? My guitar has been* recently "shielded" so i am quite sure that this noise came from my pedalboard and the electricity system in each venue....
Could you help me?
Maybe i need some "Current transformer" or something for the electricity?
Thanks in advance and looking forward to hearing from you!!

Sounds like something involving the grounding in the place, if it was impossible to get rid of.

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Talking about wireless pedals...