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Old 4th December 2012, 12:49 AM   #621
Congo5 is offline Congo5  United States
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Thanks good info...will have to play with it a bit ...when It gets here... good to know about the Loudthud on turnoff..... I should rig a socket for MOSFET changing...
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Originally Posted by Zen Mod View Post
easy

just use T0-220 cased mosfets IRF510 , IRF610 are good candidates ..... or fancy Toshiba ones
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Old 4th December 2012, 05:49 AM   #622
waam68 is offline waam68  United Kingdom
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Originally Posted by bcmbob View Post
That's what I thought but I noticed this reference by waam68 in an earlier post. I have read just about everything but that post caught my eye.
Hi Bcmbob.....Don't pay to much notice of me as I only just know what I'm doing! Anyhow the ACA with pc power supplies is still doing great as my main amp so worth giving it a go stock before experimenting. If it gels with your speakers this amp punches above its weight with great bass and lots of detail. For info mine is dead quiet with no turn on thump and my stock sinks only get warm rather than hot. I did email nelson pass who kindly replied saying there was plenty of scope to up the supply voltage in the power supply so at some point I will give that a go.
Regards
Mike
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Old 4th December 2012, 01:54 PM   #623
bcmbob is offline bcmbob  United States
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Thanks Mike, Hope to have mine built by the weekend.

For what I have in mind, I really would like to use something other than a wall wart or brick. I'd like to mount the PS inside a chassis so I'm open to all suggestions. Maybe one of the Velleman offerings ?
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Last edited by bcmbob; 4th December 2012 at 01:59 PM.
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Old 4th December 2012, 02:02 PM   #624
6L6 is online now 6L6  United States
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Use one of Peter Daniel's 'universal' power supply boards as a single rail. You will need a 14-15v transformer, diodes for the bridge, some big capacitors, say 30,000uf or so at 25+ volts and a handful of .47ohm 3W resistors. And all the associated widgets for the mains side of the transformer. (power plug, fuse, line cap, switch...)

More info in this thread - Universal Power Supply PCB

The board would generally look like the stuffed side of this -
Click the image to open in full size.

Peter Daniel can be contacted here - http://www.audiosector.com/contact.asp Or just shoot him a PM

Last edited by 6L6; 4th December 2012 at 02:04 PM.
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Old 4th December 2012, 02:07 PM   #625
bcmbob is offline bcmbob  United States
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Sounds great! I have two 18.5 V laptop bricks I can use till I get that unit.

PM Sent.

Thanks Bunches.
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Last edited by bcmbob; 4th December 2012 at 02:15 PM.
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Old 4th December 2012, 02:15 PM   #626
6L6 is online now 6L6  United States
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There is no downside in using the SMPS - it's what the ACA was designed for, after all...
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Old 4th December 2012, 03:27 PM   #627
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Originally Posted by 6L6 View Post
There is no downside in using the SMPS - it's what the ACA was designed for, after all...
But I ask, being a novice and all, is there an upside to using something other than the SMPS?

Or is it just a matter of choosing which one you want to go with that is cheap and handy (I have a surplus Hammond, a nicely made Meanwell SMPS, and power bricks from laptops galore).
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Old 4th December 2012, 05:44 PM   #628
billyk is offline billyk  United States
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Here's my creation, not as elegant as some but I like it... Makes a sweet little integrated with the B1 onboard.

Click the image to open in full size.

Click the image to open in full size.

Still have to wire the switches, I am also adding an ODAC to the right rear area. I really like the sound, absolutely dead quiet, tons of detail.
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Old 4th December 2012, 05:46 PM   #629
6L6 is online now 6L6  United States
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That's wonderful!!

I am very interested in seeing how the ODAC integrates to this project.
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Old 4th December 2012, 08:04 PM   #630
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Very nice!
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