No hum 9 volt mains adapter?

[No_Where_Fast]

Is it possible to get no hum 9 volt mains adapters? If so what's a good one?

What about powering multiple pedals? In the past I've found daisy chaining doubles, triples, etc. the hum.

Oh, I'm in the UK if that changes anything?

Thanks!

 

[Simon_F]

I've got one of these:

http://www.stringsdirect.co.uk/commerce/catalog.php?action=details&pid=1684

Powers up to 5 pedals, and no hum.

And it says AC/DC on it

 

[No_Where_Fast]

Cheers Simon,

Can you turn down the volts on it for that low battery effect?

What will it do that you can't do with a £10 regulated* PSU?

* Regulated does mean no hum, right?

 

[Simon_F]

Cheers Simon,

Can you turn down the volts on it for that low battery effect?

What will it do that you can't do with a £10 regulated* PSU?

* Regulated does mean no hum, right?

No, you can't vary the voltage.

All the cheap PSUs I've ever tried are unregulated. They're usually OK for powering one effect but hum when you try to daisy chain. I bought a Boss PSU for £30 (nearly as much as the Power Bank one) and tried daisy chaining from that - it hummed badly. :2:

With the Power Bank one no hum.

 

[Bludave]

I use a daisey chain, but I have wired all the pedals with GeorgeL cables, and I power it with a one spot. I don't know if all these items are available in the UK but check and see. Most of the hum is probably coming from the patch cables not the power supply. I completley rewired my board with the above products and have eliminated 99% of the noise. If you use pedals that don't have adapters you can buy a battery connection that will put an external 9V adapter on it. This way all you will need is to turn on the board and plug in!!!

 

[proxy]

It is more then likely the power.

One way you can test is running the pedals on batteries. If the hum goes away then it is because of the power.

The problem is that there can be noise on the power line from appliances in your house, flourescent lights, and even pedals in the daisy chain.

Filtered power will eliminate the noise from your household appliances.

Isolated grounds will eliminate the noise from one pedal to another because any noise the make on the power doesn't get sent to the next effect.

Batteries give you this clean power because they aren't on your household circuit, and they have isolated grounds because the power source in each one is seperate from the next.

 

[No_Where_Fast]

No, you can't vary the voltage.

All the cheap PSUs I've ever tried are unregulated. They're usually OK for powering one effect but hum when you try to daisy chain. I bought a Boss PSU for £30 (nearly as much as the Power Bank one) and tried daisy chaining from that - it hummed badly. :2:

With the Power Bank one no hum.

I just ordered my Power Bank! No more batteries for me!

Cheers everyone for your help!

 

[StefanM]

Consider a switchmode power supply instead of a traditional heavy step-down transformer one.

I recently bought one, haven't tried it out yet, but it's very slim & light & regulated. I don't know why companies don't all switch to them - sure they're a little more expensive, but they'd save heaps on shipping costs!

 

[Imp]

i have a bit of a problem with mine - Powerbanks put out a higher current than any other supply ive found (still 9V, just different mA's)

this means it cooks my older pedals, creating a horrible crackling buzzy sound with the guitar barely audible below it. would be nice to be able to vary the voltage/wattage heh

otherwise, for digital units, you really cant go wrong heh - try maplin if you cant find them elsewhere.

 

[jeremy]

the voodoo labs pedal power 2 has the adjustable voltage on two outputs for your overdrive pedals