mrphotodude

looking for phantom supply self etch pcb image
« on: January 31, 2009, 07:07:56 AM »
yes, title says it all....
i have some preamp psu's with phantom on them ect...but wanted to find a standard already good designed phantom power pcb trace image.

Is the soft start any good?
http://www.diyfactory.com/projects/softstartphantom/softstartphantom.htm

or this unit?
http://sound.westhost.com/project96.htm

or any recommendations you can throw out.

How much current is really needed for a single mic's phantom power? I assume i can use a tiny transformer for a single mic if needed yes?
another day...another dalek


pucho812

Re: looking for phantom supply self etch pcb image
« Reply #1 on: January 31, 2009, 01:17:39 PM »
average per one channel 10 miliamps IIRC
Every mic has a purpose it might be a door stop or a hammer, but every mic has a purpose.

mad.ax

Re: looking for phantom supply self etch pcb image
« Reply #2 on: January 31, 2009, 02:44:55 PM »
Worst case scenario hapens when both hot and cold are shorted to the ground (trough the 6K8 resistors), then I=U/R...
48/6800 = ~7mA, multiply that by 2 (cause there are 2 X 6K8) = 14mA. So, assume 15mA per channel, and you'll be fine.

Axel


 

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