Help please! Power Supply Trouble (Visual Sound One Spot) - Jemsite
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post #1 of 13 (permalink) Old 06-27-2011, 10:02 PM Thread Starter
 
Join Date: Apr 2011
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Exclamation Help please! Power Supply Trouble (Visual Sound One Spot)

Hi everyone, I come to you for help!

I picked up a Visual Sound One Spot today after reading on several different threads of how people thought it was great value and worked fine.

However, when I plug it in, I get a lot of humming and noise if I move my hand near the pickup I'm using. This noise doesn't occur if my pedals are on battery power, or if I'm patched into the amp directly. In fact, while it's humming, if I unplug the One Spot, the hum stops.

Is this a case of a bad power supply? An inherent problem in daisy-chain power supplies?

Should I return the One Spot and just go get a Voodoo Labs Pedal Power 2+ instead?

Thanks a lot!

Pedals: Boss DS-2, TC Electronic Flashback
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post #2 of 13 (permalink) Old 06-27-2011, 10:14 PM
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

I would first check polarity...but I think both pedals are center negative so it shouldn't be that.

You may also have a ground loop hum issue? (I'm just spitting out ideas here, this is a common problem) In which case you would need to isolate both pedals to their own pedal power (which the PP2+ does).
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post #3 of 13 (permalink) Old 06-27-2011, 10:21 PM
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

Plug your guitar to some of your pedals separate.
It could be a conflict between one spot and some especific pedals and not with all of them.
If that hum repeats with different pedals separate it means the problem is not about a conflict between one spot and an especific pedal/s.
Now that you know the problem is not a conflict with a pedal/s it could be a conflict with your amp, who knows?
So I could only guess the problem is in one spot.
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post #4 of 13 (permalink) Old 06-27-2011, 10:35 PM Thread Starter
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

Thanks for your quick replies.

GroovyTubes: Both pedals are center-negative.

GroovyTubes and 6fingers: Even when I run through just a single pedal, the hum still occurs. That would seem to rule out interaction between the two pedals. I've tried both pedals individually and problem occurs on both.
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post #5 of 13 (permalink) Old 06-27-2011, 10:45 PM
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

So based on all info you gave us seems like one spot has a problem.
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post #6 of 13 (permalink) Old 06-27-2011, 10:45 PM
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

Did you tried plugging the power supply to another source that don't be the same that your amp is using ???
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post #7 of 13 (permalink) Old 06-27-2011, 10:56 PM Thread Starter
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

Vintage_freak_forever: Ok, just tried that. I plugged the One Spot into a power plug in the kitchen. Should be a different circuit than the one I had earlier. Same problem.

6fingers: I agree. I was just hoping that there was something I was doing wrong, since it's a 30 minute drive to get to the music store. Unless anyone else has any suggestions, looks like I'll return the One Spot and try out a Pedal Power 2+. If that doesn't solve the issue, back to batteries!
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post #8 of 13 (permalink) Old 06-27-2011, 11:01 PM
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

No batteries, there are a billion different power supplies out there including crap radio shack 5 dollars ones lol
If that one has a problem just exchange it, it happens even with mesa stuff
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post #9 of 13 (permalink) Old 06-27-2011, 11:31 PM
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

This is a recurring problem with the One Spot and that's why I can't recommend them. Get a power supply with isolated outputs for each pedal like the Pedal Power Plus you suggested (I use a Gator G Bus 8 which works really well, and there's a great Dunlop one too), or get a Sanyo Pedal Juice, and the hum will go away.
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post #10 of 13 (permalink) Old 06-28-2011, 12:22 AM
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

I'm using the godlike power all basic kit, no hum, it just works
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post #11 of 13 (permalink) Old 06-28-2011, 09:42 PM Thread Starter
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

Just a quick update, picked up a Pedal Power 2 Plus, problem solved. Thanks for the help everyone!
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post #12 of 13 (permalink) Old 06-28-2011, 11:02 PM
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

Awesome.
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post #13 of 13 (permalink) Old 06-29-2011, 08:09 AM
 
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Re: Help please! Power Supply Trouble (Visual Sound One Spot)

Glad to hear it. I've never had problems with my one-spot but I know any daisy chain is susceptible to noise issues depending on the wiring of the house, other devices nearby, etc.
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