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Sound Reinforcement - Forums for Live Sound Professionals - Your Displayed Name Must Be Your Real Full Name To Post In The Live Sound Forums => Installed Sound/Contracting => Topic started by: Michael Lamp. on December 12, 2014, 11:22:39 PM

Title: Board issues
Post by: Michael Lamp. on December 12, 2014, 11:22:39 PM

I have a soundcraft .gb8. I am having issues where a channel will start buzzing and the signal level drops dramatically. But what's weird is if I engage then disengage the phantom power button it returns to normal and stops buzzing.... any thoughts as to what could cause this? Board is only a year old. Was thinking snake but not sure.

Title: Re: Board issues
Post by: Tim McCulloch on December 15, 2014, 04:36:26 PM

Quote from: Michael Lamp. on December 12, 2014, 11:22:39 PM

I have a soundcraft .gb8. I am having issues where a channel will start buzzing and the signal level drops dramatically. But what's weird is if I engage then disengage the phantom power button it returns to normal and stops buzzing.... any thoughts as to what could cause this? Board is only a year old. Was thinking snake but not sure.

Cold solder joint, maybe dirty switching contacts on the channel insert jack(s).  Makes for semi-conduction that will become fully conductive in the presence of higher voltages (a "jump start" with a hot signal will do it, usually).