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Gear / Technical Help => Battery Boxes, Preamps, Mixers, ADCs, and Processors => Topic started by: Chilly Brioschi on March 12, 2010, 02:04:14 AM
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Mackie is vague on this.
Can this 4ch mixer be powered by battery?
What, how, pin-outs, etc???
TIA!
http://www.mackie.com/products/402vlz3/pdf/402VLZ3_OM.pdf
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Can this 4ch mixer be powered by battery?
What, how, pin-outs, etc???
The three pin AC jack looks suspicious. It might be AC-only...
Call the pre-sale dept. and ask what it says on the AC adapter, which voltage etc. If it outputs DC, you should be able to replace it with a battery (at least in theory), but you will probably have to craft a custom cable. YMMV...
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Can this 4ch mixer be powered by battery?
What, how, pin-outs, etc???
The three pin AC jack looks suspicious. It might be AC-only...
Call the pre-sale dept. and ask what it says on the AC adapter, which voltage etc. If it outputs DC, you should be able to replace it with a battery (at least in theory), but you will probably have to craft a custom cable. YMMV...
Done and done
Waiting on their response...
I might have to break out a hacksaw and outright modify the wee beastie.
I may drop the Oades a line as well.
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Oh, puke! sales@mackie.com is defunct.
Trying support tech email next and maybe the support forums ::)
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I had one of those before I got my UA-5. It takes ac power on that multi pin input and is not convertible to DC input.
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My guess is that you could run the mixer circuits as such on DC power but it very much depends on the exact setup. But it will not generate phantom power.
I have seen a few of these circuits and it seems like most have a very simple circuit to create the phantom power. For the electrical design people the circuit is known as a Voltage multiplier.
http://www.play-hookey.com/ac_theory/ps_v_multipliers.html
// Gunnar
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Voltage multipliers only work with AC. If you are trying to create the correct DC supplies for a mixer, you need DC converters for the required voltages. +15/-15V is typical (possibly only +12/-12V), plus +48V for phantom and sometimes a low-voltage rail to drive LEDs or logic circuits. The VAC input would be dropped across a +15/-15 transformer, then regulated and filtered. The +48V would be multiplied off of the +15V rail, and the low-volt supply is usually dropped from the +15V too, unless there is need for high current on the low voltage rail, in which case there will often be a separate secondary winding on the transformer to generate the low voltage rail.
Converting this to DC would require at a minimum the +15/-15V converter (there are off the shelf solutions for that) and +48V (which has to be built with components--I published one such circuit last year). Also note the unit's listed power consumption of 8W--that's probably a maximum, and typical consumption is probably much lower, but that is a huge load for a battery so you'd need to pack plenty of power.
Thanks for the tips.
No answer from tech support, and no luck getting a schematic yet, either.
The DC power doesn't intimidate me, but a quiet, switchable P48 would be new territory.
I usually lug 140WH with me, so another 50 wouldn't be noticed ;D
I want a schematic before I bust out a $bean on an experiment!
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?
http://taperssection.com/index.php?topic=133283.0
Not familiar with Samson but it's battery powered. ;D
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Behringer makes the UBB1002 or UB1002. It's larger, but runs on 9V batteries. I've used it and it sounds pretty good. Clean sounding.
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Well, everybody is asking this... so I'll do it: I'll build a battery box for the 402, and since some people asked for it, I'll throw in
INSERT jacks ^-^
see battfor402.blogspot.com/ (http://battfor402.blogspot.com/)
RL