Black Box

rove · October 23, 2006, 05:12:04 PM

I have come into the possesion of a Fulltone Black Box power supply. Though all my diy pedals so far are battery only, the more I make the more a dedicated PSU seems to make sense. I run one pedal off of 18V currently, does anyone know if there is a way to splice two of the Black Box 9V outputs to make an 18V source for one pedal, or am I asking for trouble?
thanks for any advice.
Paul

Barcode80 · October 23, 2006, 11:55:02 PM

asking for big trouble! do yourself a favor and build a charge up circuit instead.

darron · October 23, 2006, 11:57:26 PM

Quote from: rove on October 23, 2006, 05:12:04 PM
I have come into the possesion of a Fulltone Black Box power supply. Though all my diy pedals so far are battery only, the more I make the more a dedicated PSU seems to make sense. I run one pedal off of 18V currently, does anyone know if there is a way to splice two of the Black Box 9V outputs to make an 18V source for one pedal, or am I asking for trouble?
thanks for any advice.
Paul

spliced together you'd still only get 9 volts... you could change the transformer to get 18 volts, but why would you? you should probably have two psu's.

Psych0F0x · October 24, 2006, 01:38:09 PM

isn't it possible to make a connector that hooks two 9V connections to 1 of 18 like you can do with two 9V batteries?
I'd like to know too cause I'm planning on building a Shaka HV that needs 18V.

Somicide · October 24, 2006, 01:44:20 PM

no, the best case scenario is you get two 9v connections in parallel out of a PSU. You be best off building a PSU that outputs 18V, or using the charge up circuit mentioned.

rove · October 24, 2006, 03:19:31 PM

Thanks guys, that is as I suspected.
Paul

Mike Burgundy · October 24, 2006, 03:39:17 PM

Just to clarify:
two batteries can be stacked, because their terminals aren't referenced to anything yet.
Inside the blackbox, there are regulators for each output (or groups of outputs) which are connected on one end to ground (- end). If you connect two of these outputs in parallel (+ to + and - to -) you still get 9V. If you stack them (-,+ to -,+) as you would with batteries, you're effectively shorting the first regulator to ground which is a good way to let out the magic white smoke.
When I thought about this it seemed a little clearer than this came out, but I hope it's okay
hih

skiraly017 · October 24, 2006, 03:49:34 PM

Check this out.

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