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zanash
2007-11-16, 01:09
Is there any interest in me writing up a "how to....." build a decent linear power supply ?

A number of people have asked about these .....

This is not intended to tread on any toes but rather to give some idea of what you can do ..

fast eddie
2007-11-16, 02:11
Zanash,

I'd be interested in this if you decide to go ahead and do it

nacmacfeegle
2007-11-16, 04:46
Me too, new power supplies sound like a good winter project to keep me out of the pub!

iPhone
2007-11-16, 08:31
Is there any interest in me writing up a "how to....." build a decent linear power supply ?

A number of people have asked about these .....

This is not intended to tread on any toes but rather to give some idea of what you can do ..

With all the talk about where to get them and which one to buy, I am sure there will be an audience for your post. I am up to another project. Plus in another thread that got off track a little about mods, people have asked what projects they could do it get started without soldering on the SB3. An outboard PS is the perfect project for that.

Has any thought gone into maybe three levels to your project posting or three different posting with different levels of Power Supplies? 1) Basic linear replacement PS, 2) The ultimate linear replacement PS, 3) The ultimate SB3 PS that would require mods to the SB3 itself. The last one is where I am headed with an outboard PS. My thought is to provide the needed voltages from an external PS and disable any internal PS inside the SB3.

singleended40
2007-11-16, 11:44
I just want to have comments what I owned and have owned three different PS for my SB2 and SB3. When I started to have SB3 I had a Bolder Basic PS and an Elpac too but then I built myself a linear PS based on an already made Power One (got from ebay). The custombuilt linear PS sounds a lot better than both from Bolder(Basic and Elpac)with more transparency and details. Then I have had a Channel Island VDC-SB which sounds more musical and 3D than my custombuilt one in my main system. Besides both SB2 and SB3 have modified with pulse transformers.

ezkcdude
2007-11-17, 16:24
It's very easy to build a power supply:

http://www2.kumc.edu/students/ezamir/diy.html#ezdual

Erik Hoel
2007-11-17, 16:43
I can attest that all the boards that Evan offers are quite high; the PSU in particular is very easy to assemble. I have yet to begin assembling the EZDAC however - SMD soldering seem a bit daunting...

Erik

________________________________

From: diy-bounces (AT) lists (DOT) slimdevices.com on behalf of ezkcdude
Sent: Sat 11/17/2007 3:24 PM
To: diy (AT) lists (DOT) slimdevices.com
Subject: Re: [SlimDevices: DIY] Is there any interest ?




It's very easy to build a power supply:

http://www2.kumc.edu/students/ezamir/diy.html#ezdual


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ezkcdude
2007-11-17, 19:37
Hey, Erik. I think the new version of the ezDAC is a little easier to build, because it has soldermask/silkscreen layers. Anyway, that's OT. As for the psu, I think anything more sophisticated than a basic LM317 or 7805 would be overkill for the Squeezebox. This is fairly well documented around here, but since the internal regulators of the SB3 are switchers, there's only so much you can do. Anyway, the point of linking to my site was just to show people that making a simple linear, regulated psu is actually quite simple. Anyone who has a copy of Horowitz can figure it figure it out quite quickly.

Deaf Cat
2007-11-18, 04:01
This link also talks about psu's if intrested:
http://forums.slimdevices.com/showthread.php?t=18491&highlight=heuer
about page 7 I think the psu talk starts.

Don't know what you have tried Zanash, but would be intresting to read about it :)
especially if you have played with inside to... :D

Have you tried different mains cables to the psu?

zanash
2007-11-18, 06:47
There appears sufficient interest for me to set pen to paper as it were.

This is meant to be a basic psu ...you can build more sophisticated units when you have got the hang of the basics....

tools required should be minimal

soldering iron
maybe desolder braid or a sucker
digital multi meter
screw drivers
hot air gun [for heat shrink]
there must be other bits but these are all I can of at present.

I'll do it for uk mains but its only a question of using a different transformer for other input voltages.

zanash
2007-11-23, 05:18
ok I've got most of this written ....just need to sort out the pics.

Deaf Cat
2007-11-23, 14:00
Cool :)
.