Blacet vs Jameco vs PAIA power supply

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Rob_C
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Blacet vs Jameco vs PAIA power supply

Post by Rob_C » Mon Mar 25, 2013 8:07 pm

Can someone explain any significant technical differences between the $129 Blacet PS505, the $26.95 Jameco Dual-Output Adjustable Linear Regulated Power Supply and the $76.45 PAIA 9771-15 Regulated, Dual-Polarity 15VDC Power Supply Kit. The PS505 puts out +/-15V @ 500 mA, the Jameco +/-15V @ 750 mA and the PAIA +/-15V @ 600 mA. Does one offer more filtering/better stability/lower noise/etc. over the others?

I'm not interested in the cosmetic differences. Obviously the Blacet and PAIA are designed for each brand's particular connectors and mountings/panels/switches/LEDs and those customizations are responsible for cost differences over a generic unit like the Jameco. PAIA likes to keep line voltages out of the rak so they use external wall warts. Blacet specifies a high quality transformer and low noise components. But is the Jameco really that different from the others?

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fluxmonkey
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Post by fluxmonkey » Mon Mar 25, 2013 9:43 pm

jameco spec "±5 to ±15VDC, 175mA to 750mA per supply" could be a little misleading... on these designs, generally the higher voltage has the lower amperage; at 15v i'd expect you'd see 175mA, not 750. it looks like a very bare-bones supply, w/ minimal filtering caps, so you can expect higher ripple noise, and lower stability, than beefier designs. whether it bothers you or not is a little more subjective, but for me it's a significant difference.

for economy, i've had very good experiences w/ used PowerOne linear supplies, from surplus or ebay.
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Moog$FooL$
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Post by Moog$FooL$ » Mon Mar 25, 2013 11:17 pm

yup..... i'm with flux on this.

stay away from that Jameco supply. it's prolly not terrible but nowhere's near the quality of the Blacet or PowerOne.

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cerebrosis
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Post by cerebrosis » Tue Mar 26, 2013 12:07 am

I ordered the Curetronic psu, 15v@+2a/-1a. It looks to be pretty high quality from what you can see in the photo. 44euro.

I choose it for hookupability to cynthia sixpacs and its size is perfect for my custom jack & power interface/supply module.

Another to the mix.

If its clean I might switch all my 15v modules to this supply.

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werock
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Post by werock » Tue Mar 26, 2013 2:50 am

Will be interested in hearing about your experiences with the Curetronic supply.

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cerebrosis
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Post by cerebrosis » Tue Mar 26, 2013 3:57 am

Sure thing.

I like the blacet supply but it's low on the power side for larger systems and digital modules.

Rob_C
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Post by Rob_C » Tue Mar 26, 2013 10:55 pm

The Jameco specs are

Power output (each supply): 5VDC @
500mA, 10VDC @ 750mA, 12VDC @
500mA, and 15VDC @ 750mA <--possible error?


If you add additional capacitors, do you reach the same filtering as Blacet and PAIA?

This is for my technical curiosity about power supply design.

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Moog$FooL$
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Post by Moog$FooL$ » Wed Mar 27, 2013 3:51 am

take a look at Ray Wilsons MFOS site.
go to the power supplies in the synthdiy section.

in fact check out the whole thing if u've not been their yet.

his adjustable supply is very similar to Blacets.

in the end though....... for cost & high quality design, i doubt we could beat p1/condor as mentioned above by Mr. fluxmonkey.

:tu:

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vmgas
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Post by vmgas » Thu Mar 28, 2013 4:48 pm

im pretty into the new paia psu

Rob_C
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Post by Rob_C » Thu Mar 28, 2013 8:33 pm

Thanks guys.

Also found some technical information about power supplies at the electro-music forum:

How to design and build a PSU (power supply)

and

Linear Power Supply For Modular Synth Application

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Moog$FooL$
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Post by Moog$FooL$ » Fri Mar 29, 2013 12:33 am

Rob_C wrote:Thanks guys.

Also found some technical information about power supplies at the electro-music forum:

How to design and build a PSU (power supply)

and

Linear Power Supply For Modular Synth Application
:woah: just had a quick look at those links. nice, thanx. :tu:

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Kyhotay
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Various PS

Post by Kyhotay » Fri Apr 05, 2013 5:12 pm

I have the Blacet PS500, PAiA 9771 and PAiA wing (beefed up) supply. I have had the PAiA for some 2 years now. I guess was one of the first guinea pigs to build one.

Operationally I think they are both fine supplies. I do have a preference toward Blacet due to the toroid transformer as opposed to a wall wart.

I have modified the 9771-15 to run at +/1 9V and added the PAiA K-60 kit to provide regulated +18V and am running two full dual wing cabinets with just the one supply. Noise has dropped enormously on any of the modules that used 18V.

I don't know if this is the right spot to mention this on the forum but I am about to put the PS500 on eBay. I've decided to move my frac modules to the new Blacet dual racks so few power cords and line conditioners are needed
Brian Folkes
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