JohnX
Well-known member
I looked all through this site for a post on this topic and did not find any. I am hoping that it’s OK to post this here.
I thought it might be handy to create a universal 9 V power supply for some of the guitar pedals that we have which are “battery only”.
Some pedals really eat batteries and it just gets annoying having to change them constantly. This theoretically would’ve solved that problem.
Here is what I tried:
I took a standard Boss 9 V power supply for stomp boxes & replaced the traditional center negative jack with a 9 volt battery terminal - polarity reversed so that the opposite terminals (of the battery terminals inside the pedal) would align correctly. (terrible diagram attached.)
Although I can get this simple hack to work with numerous other devices, when I try to use it on the actual guitar pedals, it powers the devices perfectly but I end up with some serious noise. Almost sounds like a nasty grounding buzz.
Yes, the polarity is correct. Please don’t ask.
I have tried this three times with two different power supplies and three different sets of battery terminals. Same result every time.
I found someone on Amazon (screenshot attached) selling a similar product and when I read the reviews, the responses from the guitar players indicated exactly the same results with stomp boxes. His design is better and easier.
Can anybody point me in the direction of what might be causing the excessive noise in the pedals? I am assuming that I must be overlooking something simple and counting on one of you to point it out immediately.
Thanks in advance
I thought it might be handy to create a universal 9 V power supply for some of the guitar pedals that we have which are “battery only”.
Some pedals really eat batteries and it just gets annoying having to change them constantly. This theoretically would’ve solved that problem.
Here is what I tried:
I took a standard Boss 9 V power supply for stomp boxes & replaced the traditional center negative jack with a 9 volt battery terminal - polarity reversed so that the opposite terminals (of the battery terminals inside the pedal) would align correctly. (terrible diagram attached.)
Although I can get this simple hack to work with numerous other devices, when I try to use it on the actual guitar pedals, it powers the devices perfectly but I end up with some serious noise. Almost sounds like a nasty grounding buzz.
Yes, the polarity is correct. Please don’t ask.
I have tried this three times with two different power supplies and three different sets of battery terminals. Same result every time.
I found someone on Amazon (screenshot attached) selling a similar product and when I read the reviews, the responses from the guitar players indicated exactly the same results with stomp boxes. His design is better and easier.
Can anybody point me in the direction of what might be causing the excessive noise in the pedals? I am assuming that I must be overlooking something simple and counting on one of you to point it out immediately.
Thanks in advance