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 Forum index » DIY Hardware and Software » MusicFromOuterSpace.com designs by Ray Wilson
+/-15v Power Supply for MFOS Modular
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Revok



Joined: Jan 25, 2012
Posts: 7
Location: Philadelphia

PostPosted: Wed Jan 25, 2012 7:39 pm    Post subject: +/-15v Power Supply for MFOS Modular Reply with quote  Mark this post and the followings unread

I'm planning on building a MFOS modular but with a +/-15v power supply. I don't feel competent enough to attempt building one and would like to know if anyone has any suggestions.

Right now the only two I really know of are the ones sold by Blacet and MOTM.
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marvkaye



Joined: Mar 14, 2011
Posts: 225
Location: Fla

PostPosted: Thu Jan 26, 2012 7:00 am    Post subject: Reply with quote  Mark this post and the followings unread

You can buy +/-15 power supplies all day long. I've purchased model HA15 units on Ebay needing minor repair (capacitor replacement) for next to nothing, and new old stock units for around $30-40 including freight. Look at ebay #360250336434 (just +-15) or #330664072221 (also has 5V in case you have digital components that need that voltage). BTW, building the MFOS LM317/337 supply is actually pretty easy if you're comfortable dealing with transformers & mains voltages.
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Revok



Joined: Jan 25, 2012
Posts: 7
Location: Philadelphia

PostPosted: Thu Jan 26, 2012 1:19 pm    Post subject: Reply with quote  Mark this post and the followings unread

Awesome thanks!
This is probably a dumb question but is it possible to get too many amps on a power supply? I'd like to get as much juice as I can for the money.
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Mongo1



Joined: Aug 11, 2011
Posts: 411
Location: Raleigh NC

PostPosted: Thu Jan 26, 2012 1:27 pm    Post subject: Reply with quote  Mark this post and the followings unread

Well, in general Amps cost money and weight, so you don't want to get too carried away. Other than that, I don't think there's much to worry about in that regard...
Gary
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Revok



Joined: Jan 25, 2012
Posts: 7
Location: Philadelphia

PostPosted: Thu Jan 26, 2012 1:35 pm    Post subject: Reply with quote  Mark this post and the followings unread

Cool. I'll keep that in mind. Thanks, Gary.
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Mongo1



Joined: Aug 11, 2011
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PostPosted: Thu Jan 26, 2012 3:21 pm    Post subject: Reply with quote  Mark this post and the followings unread

One thing I will add - be very careful of 'switching' supplies. They sometimes advertise enormous amounts of capacity at a very low cost. Unfortunately they can do some unwanted things, like generate large amounts of noise. And of course when they fail, they do a spectacular job of it.

I tend to trust large pieces of iron and hefty voltage regulators.

But that's just me...
Gary
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Revok



Joined: Jan 25, 2012
Posts: 7
Location: Philadelphia

PostPosted: Thu Jan 26, 2012 3:56 pm    Post subject: Reply with quote  Mark this post and the followings unread

I think I'm going to pick up this one.

http://www.ebay.com/itm/POWER-ONE-DC-POWER-SUPPLY-15V-1-5A-HB15-1-5-A-/330669828974?_trksid=p5197.m185&_trkparms=algo%3DSIC.NPJS%26itu%3DI%252BUA%26otn%3D12%26pmod%3D350522506143%26po%3DLVI%26ps%3D63%26clkid%3D5891719821043337327#ht_600wt_1147

If anyone sees any issues with it, let me know. Otherwise, thanks all!
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marvkaye



Joined: Mar 14, 2011
Posts: 225
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PostPosted: Thu Jan 26, 2012 5:17 pm    Post subject: Reply with quote  Mark this post and the followings unread

Probably not a good choice, as it's only +15V... most modules are going to require both plus 15VDC and minus 15VDC.

<marv>
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Revok



Joined: Jan 25, 2012
Posts: 7
Location: Philadelphia

PostPosted: Thu Jan 26, 2012 6:12 pm    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for spotting that, Marv. Gonna give this another go. I think I got it right this time.

http://www.ebay.com/itm/POWER-ONE-POWER-SUPPLY-15-1-5-A-15-1-5-151-5A-/260393676855?pt=LH_DefaultDomain_0&hash=item3ca0ac3037#ht_2650wt_1147
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marvkaye



Joined: Mar 14, 2011
Posts: 225
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PostPosted: Thu Jan 26, 2012 6:49 pm    Post subject: Reply with quote  Mark this post and the followings unread

Yep, that's a winner. It's the big brother to one I bought just a few months back... mine is only 800mA at +/-15, this one is 1.5, almost double the capacity. You should be able to power lots of modules with that. Nice find for under $40 delivered. Cool

<marv>

Last edited by marvkaye on Thu Jan 26, 2012 7:23 pm; edited 1 time in total
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Revok



Joined: Jan 25, 2012
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PostPosted: Thu Jan 26, 2012 7:04 pm    Post subject: Reply with quote  Mark this post and the followings unread

Just put in the order. Thanks so much.
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