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Blacet PS800 standalone power supply
MUFF WIGGLER Forum Index -> Fractional Rack Modules  
Author Blacet PS800 standalone power supply
monstrinho
I'm posting the recent email from the Blacet mailing list for those of you who don't subscribe or may have missed it:

Quote:
Hi All:

There has been some interest in a replacement for the now obsolete PS505 self contained power supply. We can certainly manufacture an enclosure for the PS800; but with design costs and minimum orders at the metal shop, we need to know what the interest really is.

These would be compatible with the PSCONN3 distribution boards which have 18 spaces but could be used with the older PSCONN2 also.

Price point is estimated at $129-$149.

Drop us an email (blacet@blacet.com) with PS800 in the subject line.

Thanks


So, if there's anyone interested in seeing this happen, get in touch with Blacet and let them know.
Samuron
I told them I'd certainly buy one, at least at the low-end estimate.
monstrinho
I wrote and told them that I'd be interested in a version with a metal case (like the PS500) and one without (a "raw" version, if you will). I really hope this happens. There's always J3RK's upcoming DIY PSU board, but it'd be great to have an option on the market that's just ready to plug and play.
anal og
hi guys
did you finally get this power supply? have you find any interesting recent products you would advice me, please? looking for a power supply a 6U case wink
thanks
monstrinho
I have no idea if Blacet has decided to go ahead with this or not. It has not shown up for sale, so my guess is not, but you should email him and ask.
dJ dAb
I just sent an email, expressing my interest
fracmonkey
Just in from Blacet...

"News from Blacet Research:

This is the fully contained PS800 with IEC power connector (cord supplied in US and Canada) and power switch. Compatible worldwide with no adjustments.

+/-15V @800/800 mA.

Six mounting holes compatible with old Frac Rak so it can be used as a replacement for the PS505.

One four pin power out connector. Use module power cord to connect to a distribution board such as PSCONN3 or PSCONN2 (optionally use PSCONN Cable for the PSCONN2--still available on request).

Now available to order.

The regular price is $139 but you can preorder for $119. Limit of 2 at this price.

https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=Q B88ZX27FNR2Q
tron23
Great news! w00t
dJ dAb
Ordered 2
BananaPlug
Ordered two here as well.

As much as I've been a decades long fan of the good old PowerOne supplies they don't coexist easily with spring reverbs due to power line frequency hum from the transformer. This "modern low noise switching supply" can handle the same load as a 15V PowerOne HAA type and ought to be hum-free, smaller, lighter, cooler...

nanners
fracmonkey
BananaPlug
Nice. I didn't know they were out yet. Can we have a look inside?
monstrinho
The anodized black is SEXXXXXXXY!!!
fracmonkey
The photo is off the Blacet "News" page.

I would bet the inside is the "bare" supply used on the RAK-2.

Enclosure to avoid nasty customer experiences and keep the lawyers happy...

(Not to mention that super hot graining...wink
dJ dAb
Weighs next to nothing and tiny too (roughly 5.25" x 4" x 2")...

BananaPlug
Great. I can mount a connector next to the power switch and replace the plastic grommet with knockout plug. Very convenient. thumbs up

edit: The ones I ordered arrived a few hours after I posted this. applause
Hermetech Mastering
How come it's so much smaller than the old PS500, yet puts out more power?
monstrinho
Hermetech Mastering wrote:
How come it's so much smaller than the old PS500, yet puts out more power?


Progress!! lol
Hermetech Mastering
Indeed, may have to pick up a Rak 2 rack mount frame, the trade section here seems sadly lacking in Frac stuff at the mo!
Hermetech Mastering
Is quality better/worse than before wrt cleanliness of power etc? Loved the look of those giant blue covered toroidal mains trannies on the PS505s!
fracmonkey
Hermetech Mastering wrote:
How come it's so much smaller than the old PS500, yet puts out more power?


Switching technology. It is now in everything and is very efficient. In the early days it was a bit noisy but now is fine.

Hard to find linear supplies anymore. They are expensive, heavy, produce waste heat and not good for the whole global warming thing.
Hermetech Mastering
Thanks, I am grateful for the technical knowledge on here! Are they the same type of thing as these Class D Hypex amps etc., that everybody's going on about recently?

Was the old PS500 and PS505 linear, and the new PS800/Rak2 switching?
Hermetech Mastering
double post
Muff Wiggler
Yep, previous Blacet supplies were linear.

Maybe I'm a Luddite but it really disappoints me to see switching power from Blacet, from everyone in Euro, etc. I don't like them. I don't feel they have any place in audio signal chains.
Hermetech Mastering
Can you explain more why Mike? I'll try and hunt down older PS500/505s if there's a good audible or stability based reason to do so.
Muff Wiggler
I dunno, I'm not an engineer. Just lots of personal experiences and ancecdotal evidence. I don't trust them. They make stuff flakier and noisier and prone to weirdness, and lots more stuff to break.

I know the issues with them can be engineered away with extra layers of complexity, but, I dunno. Just don't like 'em. Unfair personal bias maybe.
monstrinho
Muff Wiggler wrote:
I dunno, I'm not an engineer. Just lots of personal experiences and ancecdotal evidence. I don't trust them. They make stuff flakier and noisier and prone to weirdness, and lots more stuff to break.

I know the issues with them can be engineered away with extra layers of complexity, but, I dunno. Just don't like 'em. Unfair personal bias maybe.


I have to say that I used to agree, but I've been using a Blacet RAK-2 with the new power supply in it for over 9 months now, and I cannot hear anything at all that leads me to believe it is having a negative affect on the audio. It is rock solid and very stable, nothing weird or quirky happening at all. When I look at it on the scope, it's very clean.
Cat-A-Tonic
I had a situation recently where oscillators were bleeding into another module on a TipTop powered bussboard.
Moving the modules to a Power1 linear supply completely solved the problem.
You can read about it here:
https://www.muffwiggler.com/forum/viewtopic.php?p=1757263#1757263
Hermetech Mastering
Cheers, am tempted to hunt out PS500s just in case then...
shadmock
Hello Everyone: does anyone know the max amount of modules this can power? I'm starting a new system and will be going Frac/Blacet/Paia/Metalbox/Barton route....
monstrinho
shadmock wrote:
Hello Everyone: does anyone know the max amount of modules this can power? I'm starting a new system and will be going Frac/Blacet/Paia/Metalbox/Barton route....


It's 800mA, so you should figure a maximum of maybe 600mA to make sure you're not pushing the limit of the PSU. Power draw for modules can be a tricky thing; LEDs draw power when lit, certain patches demand more out of a module than others, so you should always err on the maximum draw rather than the minimum, For Blacet modules, the power draw of the various modules is on their site. Other manufacturers can probably give you a good estimate for each module via email if you contact them. Tha Blacet Rak-2 is designed to power up to 17 modules on a 800mA supply, so that should give you a good estimate as far as an upper limit goes.
Hermetech Mastering
There's a whole thread about power draw for different Frac modules, I think it's stickied, have a search. AFAIK Blacet PSUs are "very conservatively rated", so you can go up 800mA without worrying.
fracmonkey
You really have to check out the power consumption spec of each module.

They all differ but a rule of thumb is 50 mA per module. You only have to consider the + side generally, so 800/50 is 16 modules.

Switching supplies have been used in most musical applications for many decades and they work fine. In fact it is hard to find components to make linear supplies anymore. They are heavy, produce extra heat and of course are not "green".
Hermetech Mastering
But according to some people switching sound worse. Hence the above discussion on PS500 vs PS800 linear vs switching supplies etc. I found a 500, gonna try and find a couple more...
werock
shadmock wrote:
Hello Everyone: does anyone know the max amount of modules this can power? I'm starting a new system and will be going Frac/Blacet/Paia/Metalbox/Barton route....


If you use the Frac section of Modulargrid to put your rack ideas together it should give you an approximate power rating - most of the 'standard' modules have the current draw listed on there.

https://www.modulargrid.net
BananaPlug
Hermetech Mastering wrote:
But according to some people switching sound worse.

The designs and parts have gotten a lot better over the years and this one is designed by Blacet specifically for modular gear. Not fair to lump it in with everything that came before. Also, Modulargrid power specs are not all correct. Check manufacturer's info.
shadmock
Thank you everyone for the responses!!--I received an email from Blacet that confirms what you guys are saying-800mA, 16 modules @ +50mA ea. It slows my roll down just a tad-I had visions of waaaay more than 16 modules! But, for $214 I can get another PS and power distro....
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