Buzzing with power supply

[bossa]

Hi all

DIY noob needs help, Just built my first pedal a TS-808 clone from Das Musikding. Works great with a battery but when I plug in a power supply theres is a major buzzing noise. The LED comes on but there is no signal from the guitar.
I asked over at the Musikding forum : http://forum.musikding.de/vb/showthread.php?t=23378
Any advice much appreciated.
Steve

[petemoore]

   Wrong adapter ? AC ? Wrong voltage ?
  Miswired ?
  The buzzing part could mean there's just some AC ripple getting into the supply side..
  But the 'doens't work' part...could be you have an AC adapter?
  ...Reverse polarity ?

[bossa]

Hi Pete
The power supply is the one I normally use with a Digitech GNX it says 9v -1300mA .Says 9v AC on the Digitech.
Could that be the problem?

[Auke Haarsma]

yup, you need a 9V DC-adapter, not AC

[bossa]

Hi Auke
Thanks for that ....just shows what a complete and utter noob I am 
Thanks guys
Steve

[Auke Haarsma]

Hi Auke
Thanks for that ....just shows what a complete and utter noob I am 
Thanks guys
Steve

You're welcome. And, I know this from experience...so I've been there and done that aswell   

Anyways, if your TS still works with the battery, than you are lucky. With AC you could have fried some parts

[bossa]

Yep still working..I think.
would it be obvious if something was wrong?

[R.G.]

It would be obvious if it was wrong.

We have seen pedals completely burned up by connecting to a 9Vac supply. It's a great killer. It's bad enough that I have converted all of the V2 series pedals for Visual Sound to be immune to the AC power supply disaster. We saw enough of this in returns that we designed in immunity for the new series.

All the other commercial pedals that I've seen so far with a shunt-reverse diode polarity protection that get 9Vac will be fried by the AC if they sit there too long. Series-diode protection pedals are OK, but there aren't many of those.

The use of the effects-standard 5.5x2.1 plug on 9Vac adapters is like a hidden rattlesnake in your pedalboard. Someday, you'll acccidentally plug it into a pedal not intended for it.

[bossa]

Phew!! I'm lucky
Cheers R.G. 

[earthtonesaudio]

Phew!! I'm lucky
Cheers R.G. 

Quite lucky!  I did that ONE TIME and let the smoke out of a multi-effect pedal.  You never forget that smell, let me tell you...

[bossa]

Would the 9v model shown here be ok to use with my pedal ?

http://www.maplin.co.uk/Module.aspx?ModuleNo=13453

[Auke Haarsma]

if you want added noise, yeah!

I'd say go look for a Visual Sound 1Spot. Lovely ps designed for guitar fx.