On-board PSU makes Wah hum - anyone fixed this?

[erictheweary]

I think what he means is that you use the existing (metal) plate as well as their (not metal) one, so that you retain all the shielding the original was already giving...

Ahh, okay. I came to that via a thread on gearpages about this same issue and someone had posted that - clearly misread it the same as me.

There's a youtube clip of someone using mu metal ( specialist shielding foil I think) to try to solve the problem as far as I can see. I can't do youtube from here so only know what the first line on google says.

[octatonic]

Mine are *right* next to each other - I had been about to reorganise the board but I'm also thinking of downsizing so putting it off. It's not so noisy it's an annoyance when playing - just when you engage the wah before you play it's pretty obvious in my setup. Maybe my PP2+ is less than perfect... but googling suggests it's "a thing" - although no cures that I can find other than separating them. Appreciate you trying that comparison - ta.

No worries.
Have you considered it might be an issue with your PP2+ or perhaps a cabling problem?

Not saying it is, just in troubleshooting mode and trying to rule things out.

[ICBM]

If it's possible physically, try turning the power supply on its side or rotating it through 90 degrees. Electromagnetic hum like this is directional, and if you can get the two coils at right angles to each other, no hum will be transferred - just as if you turn round while holding a single-coil guitar, there will usually be a spot where the hum stops. Whether it works here will depend on the orientation of the transformer core in the power supply.

[imported_Dannyboy]

Just get an inductorless wah.... simplez

[timmyo]

Just get an inductorless wah.... simplez

I had one once - it sounded TERRIBLE. (Although I don't think those were my *exact* words in the 'for sale' ad...)

[timmyo]

If it's possible physically, try turning the power supply on its side or rotating it through 90 degrees. Electromagnetic hum like this is directional, and if you can get the two coils at right angles to each other, no hum will be transferred - just as if you turn round while holding a single-coil guitar, there will usually be a spot where the hum stops. Whether it works here will depend on the orientation of the transformer core in the power supply.

Understood.

If I keep my larger board I could both rotate it 90deg and move it further away, but if I downsize I have one option only (the under board mounting brackets) . iirc the PP2+ has a torroidal transformer

[bertie]

this isnt trumpet blowing............. but if that doesnt work, perhaps a good reason to use a 'diago a like' and gig-rig distributor ? Mount the distributor block only on the board with necessary wiring, and keep the 'power' gubbins separate ..........hence no interference ?

just a thought

[timmyo]

this isnt trumpet blowing............. but if that doesnt work, perhaps a good reason to use a 'diago a like' and gig-rig distributor ? Mount the distributor block only on the board with necessary wiring, and keep the 'power' gubbins separate ..........hence no interference ?

just a thought

I moved from a switchmode supply because of noise issues that are cured with isolated outputs. If I did ever go back to a basic switchmode supply I'd just use a daisychain rather than the Distributor. But then I'd also need 2 of the high capacity virtual batteries too (the regular ones don't pass enough current for a Strymon).

[digitalkettle]

I think what he means is that you use the existing (metal) plate as well as their (not metal) one, so that you retain all the shielding the original was already giving...

Got one of those plates...you are advised to use the existing cover too.

I've had problems...worst of all is my Fulltone CD!
These days, my wah is optional and goes on the floor

Edit: board is a PT2 and power is a PP2+

[bertie]

I moved from a switchmode supply because of noise issues that are cured with isolated outputs. If I did ever go back to a basic switchmode supply I'd just use a daisychain rather than the Distributor. But then I'd also need 2 of the high capacity virtual batteries too (the regular ones don't pass enough current for a Strymon).

ahaa OK........... the only thing I assumed would help you is the ability to have the 'transformer' bit well away from the pedals, even with a daisy chain, you'd need the actual PSU bit on the board ? (or do they make daisy-chains with long lead (as in bleed) in cables ?)