Power Supply Equipment Wire...

[ryanuk]

Hi

I have 2 small wall adaptors for powering the 2 loops of pedals on my board. They're 9v 500ma IC regulated (not switch mode) and quiet as mice, even though I'm daisy chaining. I know some may cringe at this setup, but I have no noise issues whatsoever.

The wiring has become a little tired and I had some problems at a rehearsal last week. Decided it's best to rewire.

Current I have a small ABS box which house both 2 DC connectors for the PSUs - then I run wires to the first pedal, then from the first to the second pedal etc. This time, I though I'd mount some veroboard in the ABS box, and then run discrete wires to each pedal.

Question is, what sort of equipment wire should I use? Should I use a small diameter audio screened cable? Or figure-8 "speaker" cable?

RyUK

[Brossman]

I would start by sheilding the ABS box with Al-foil tape (for heating/duct work.  expensive, yes, but very handy...) That will help you from picking up RFI (the box acting like a great antenna)...

As for the Trannies, those guys WILL hum if you stick them close enough to each other, so it'd be a good Idea to rehouse them in separate case, or spaced far enough apart to eliminate hum.  Idk how far this'd have to be; I've heard EM interference between transformers/inductors as far as 8-12in. apart.  Then again, some Hi-Fi amps put these guys right next to each other w/o any issues, so I may be talking out my @$$...

As for the wire going to each, I don't see why the (side-by-side) two-conductor that is typically found on wall-warts couldn't be implemented here as well. However, if noise is an issue for you, I'd get 2-conductor, shielded wire (24 might be a bit big... mayhaps 28 AWG?)  (I buy 2-cond/shielded Audio Technica at my local Radio/Electronics store for ~50c/Ft.  It work great for instrument cable...very flexible, very quiet, very easy to work with, and very clean (professional look, IMO)

[PRR]

If you have "no noise issue whatsoever", then foil and shielding seems unnecessary.

Use the FATTEST speaker wire you can find which is well-marked for polarity and will fit in your plugs. If I were stepping on it, #16 won't last long, #12 would last a long time... but if you use those bitty concentric plugs, you may be forced to #22 and keep my big feet away from your rig.

[ryanuk]

Thanks guys.

Yeah - noise isn't a problem so shielding just seems excessive. Gonna stick to the same setup in terms of the trannies but thanks for the tips on wiring.

Ill try and find a good 2 core, shielded cable that will fit the plugs.

Cheers

Ry

[PRR]

> 2 core, shielded cable

I would go for RUGGED before shielded.

It's DC power. Any AF/RF garbage it catches will be absorbed in the pedals' rail-caps.