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soundcraft spirit folio rac pac power supply

 
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jeffelse
audio school


Joined: 04 Feb 2013
Posts: 4
Location: detroit

PostPosted: Mon Feb 04, 2013 2:23 am    Post subject: soundcraft spirit folio rac pac power supply Reply with quote

greetings all,

I am trying to make a power supply for a soundcraft spirit folio rac pac mixer, to avoid paying $90 for the original. The user guide gives the following info for the 4-pin xlr power connector:

pin 1: 20V AC
pin 2: n/c
pin 3: 0V
pin 4: 20V AC

does this mean that pins 1 and 4 should just be jumpered together? or do they need to be seperate rails or something?

i can't find any info on the amperage draw of the mixer, but i assume that this power supply of 20VAC/1800mA would be sufficient..

http://www.ebay.com/itm/Hon-Kwang-Class-2-Transformer-NO-A12-3A-07-20VAC-1800mA-/400273858123?_trksid=p5197.m1992&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D14%26meid%3D5349638571253164710%26pid%3D100015%26prg%3D1006%26rk%3D1%26sd%3D400273858123%26

show me the err of my ways.

thanks in advance!
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Scodiddly
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Joined: 10 Dec 2003
Posts: 3369
Location: Mundelein, IL, USA

PostPosted: Mon Feb 04, 2013 9:53 am    Post subject: Re: soundcraft spirit folio rac pac power supply Reply with quote

It means you need a 40 volt transformer with a center tap, or one with two 20 volt windings.

Are you missing the original, or is it broken? I could check mine for ratings.
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Scodiddly
TOMB Moderator
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Joined: 10 Dec 2003
Posts: 3369
Location: Mundelein, IL, USA

PostPosted: Mon Feb 04, 2013 10:08 am    Post subject: Re: soundcraft spirit folio rac pac power supply Reply with quote

I went and checked. The PSU for my Rac Pac has two "18.4" volt outputs (ie the two windings or the center tap), total current 800mA.
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jeffelse
audio school


Joined: 04 Feb 2013
Posts: 4
Location: detroit

PostPosted: Tue Feb 05, 2013 2:25 am    Post subject: Re: soundcraft spirit folio rac pac power supply Reply with quote

hmm.. yes, it was lost in some move sometime in the past few years. i'm having trouble finding such a transformer on the webs. any idea where i can?

thanks!
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Rigsby
mixes from purgatory


Joined: 23 Mar 2004
Posts: 2908
Location: London, England

PostPosted: Sun Dec 11, 2016 12:34 pm    Post subject: Re: soundcraft spirit folio rac pac power supply Reply with quote

I know this thread is crazy old but I'm just wondering if you managed to build a new supply? I lost mine in a move last year and my rac pac was still going strong 'til then, I'd love to get back to using it. I've contacted soundcraft but just in case I need to build one..
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