hen barn Posted September 20, 2012 Share Posted September 20, 2012 i have just got myself a new pedal board and a 5 way 9v adaptor . Problem is i am now getting a hum when all my pedals are plugged in. i have worked it out to being my korg g5 synth bass pedal. so i plugged in the old 9v adaptor and the hum went? But i don't want to use a separate one? any ideas Quote Link to comment Share on other sites More sharing options...
nottswarwick Posted September 20, 2012 Share Posted September 20, 2012 Paging shep, paging shep. Quote Link to comment Share on other sites More sharing options...
hen barn Posted September 20, 2012 Author Share Posted September 20, 2012 Shep?? Quote Link to comment Share on other sites More sharing options...
nottswarwick Posted September 20, 2012 Share Posted September 20, 2012 Pantherairsoft on here. Nickname shep, effects guru. Quote Link to comment Share on other sites More sharing options...
pantherairsoft Posted September 20, 2012 Share Posted September 20, 2012 Hey, got your PM. If you can answer the questions I've PM'd you then I'll try and get a solution to you in the morning! Shep Quote Link to comment Share on other sites More sharing options...
simwells Posted September 20, 2012 Share Posted September 20, 2012 I'm sure Shep has already got it in hand, but it probably needs to be isolated to prevent hum. Cheapest would be to stick with the seperate supply but other than that you'll need to find a PSU with isolated outputs that will handle the 400mA it needs. Quote Link to comment Share on other sites More sharing options...
pete.young Posted September 21, 2012 Share Posted September 21, 2012 The Korg G5 takes a lot of current - don't remember exactly but I think it's something like 1.5 - 2.0 amps. I found that with a multi-supply, plugging in the Korg meant that most of the other pedals stopped working and other weird sh*t started happening. I'd start by looking up the power rating of the 5way adaptor and see what it's rated at. Quote Link to comment Share on other sites More sharing options...
brensabre79 Posted September 24, 2012 Share Posted September 24, 2012 [quote name='pete.young' timestamp='1348249105' post='1811488'] The Korg G5 takes a lot of current - don't remember exactly but I think it's something like 1.5 - 2.0 amps. I found that with a multi-supply, plugging in the Korg meant that most of the other pedals stopped working and other weird sh*t started happening. I'd start by looking up the power rating of the 5way adaptor and see what it's rated at. [/quote] This, you're probably not getting enough current for all your FX, so while they will all turn on you're likely to get issues like for example hum. Usually mains hum is related to an earth loop, but as you're using DC pedals they won't be earthed, so I would say you need a power supply with as many amps (or mA) as the total of all your pedals require. so... e.g. Pedal 1 = 500mA, pedal 2 = 300mA, pedal 3 = 400mA, Pedal 4 = 1300mA total = 2500mA or 2.5A most 9v off the shelf power adapters are about 500mA - 1000mA Quote Link to comment Share on other sites More sharing options...
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