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Revok
Joined: Jan 25, 2012 Posts: 7 Location: Philadelphia
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Posted: Wed Jan 25, 2012 7:39 pm Post subject:
+/-15v Power Supply for MFOS Modular |
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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
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Posted: Thu Jan 26, 2012 7:00 am Post subject:
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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
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Posted: Thu Jan 26, 2012 1:19 pm Post subject:
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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
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Posted: Thu Jan 26, 2012 1:27 pm Post subject:
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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
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Posted: Thu Jan 26, 2012 1:35 pm Post subject:
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Cool. I'll keep that in mind. Thanks, Gary. |
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Mongo1
Joined: Aug 11, 2011 Posts: 411 Location: Raleigh NC
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Posted: Thu Jan 26, 2012 3:21 pm Post subject:
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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
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marvkaye
Joined: Mar 14, 2011 Posts: 225 Location: Fla
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Posted: Thu Jan 26, 2012 5:17 pm Post subject:
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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
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marvkaye
Joined: Mar 14, 2011 Posts: 225 Location: Fla
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Posted: Thu Jan 26, 2012 6:49 pm Post subject:
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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.
<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 Posts: 7 Location: Philadelphia
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Posted: Thu Jan 26, 2012 7:04 pm Post subject:
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Just put in the order. Thanks so much. |
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