Powering a rack mounted guitar pedal using phantom power?

[wormfooduk]

I'm putting together a bass setup with a fuzz pedal plus compressor eq and direct out. But have been unable to find any info on powering pedals using phantom power from a pro mixer. Is this a good option or not? Any pointers would be great. 

[Hides-His-Eyes]

What sort of current draw are you expecting?

[R.G.]

If it's in a rack, why not simply use a power adapter in the rack and save yourself some complication?

Phantom setups use inductors to feed DC power from the signal line, but to raise the impedance for the signal that still has to go on the line. Sometimes they can use resistors if the DC current drain in the powered circuit is low enough and the internal voltage needed by the powered circuit is significantly smaller than the DC on the phantom line. There are a lot of considerations involved in getting it to work right.

[Ronsonic]

I'm putting together a bass setup with a fuzz pedal plus compressor eq and direct out. But have been unable to find any info on powering pedals using phantom power from a pro mixer. Is this a good option or not? Any pointers would be great. 

You could just barely run that on phantom if you were very careful about your current draw. I wouldn't do it or recommend it. Most mixers don't want to feed more than 10mils and even that's a lot.

Your direct box, maybe. Some good ones do. That's about it.

[wormfooduk]

I was thinking there would be a catch. I am trying to make an all in one box for bass players who want a simple setup when playing live in small ish venues. When you can't expect allot of outboard gear to be avalable. Powering off the phantom
power just seamed to be an option as most base players use a sansamp di box powered from the desk for the main feed. But if current draw is an issue I won't use it. Should I do anything to stop phantom supply from damaging the circuit as i sure phantom power being on at the desk when the unit at the other end doesn't use it can't do it any good. 

[Ronsonic]

Maybe I'm being overly conservative with the draw on phantom power, but see some very feeble supplies in a lot of mixers. If you're wall wart breaks it's no big deal if the phantom supply goes down it's a big mixer repair. They're supposed to be current limited and tolerate abuse, but doesn't always work in practice.

Just cap couple the signal and it'll be fine. The standard is 48V so 100v cap is good.

[wormfooduk]

I will do some more research see if I can find a circuit diagram of a phantom di box or similar