DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 149 - diyAudio
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Old 29th March 2012, 09:15 AM   #1481
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Thanks Dario, will get them bought.
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Old 29th March 2012, 02:13 PM   #1482
redjr is offline redjr  United States
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I've been monitoring this thread off and on for several weeks now. I purchased this DAC as well and started a thread about my build experience. I made some minor mods to fit the case I used. The thread can be found here.

I've been under the weather the last few days so haven't done anything further with the project. I'm very happy with the sound though, but have not made any mods to the board yet or swapped out any op-amps. I'm not sure I'm ready to tackle unsoldering/soldering to swap out any SMDs quite yet. Please feel free to add comments and potential improvements to this DAC as well. Pictures of my build experiences can also be found here.

Last edited by redjr; 29th March 2012 at 02:33 PM.
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Old 29th March 2012, 06:34 PM   #1483
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nevermind

Last edited by idjoel2000; 29th March 2012 at 06:55 PM.
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Old 30th March 2012, 02:17 AM   #1484
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Hello - I have a question about thermisters.

For my build, I have a 30 VA toroidal transformer (15Vx2 9Vx2 from ebay seller Jims_audio). Per carlmart suggestion at post 492, I plan to place the 15V and 9V rectifier bridges and associated caps on a separate prototyping board, then wire this to the miniDAC board. Would it be worth considering putting a thermister in the power supply circuit to limit current surge at startup? I've seen this done in other threads. Any thoughts?
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Old 30th March 2012, 09:25 AM   #1485
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Quote:
Originally Posted by truepaul View Post
Hello - I have a question about thermisters.

For my build, I have a 30 VA toroidal transformer (15Vx2 9Vx2 from ebay seller Jims_audio). Per carlmart suggestion at post 492, I plan to place the 15V and 9V rectifier bridges and associated caps on a separate prototyping board, then wire this to the miniDAC board. Would it be worth considering putting a thermister in the power supply circuit to limit current surge at startup? I've seen this done in other threads. Any thoughts?
unless there's a short somewhere in the circuit, your dac will not draw more current than it needed

just use a suitable fast blow fuse between the iec socket and transformer, that will be more than enough..
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Old 31st March 2012, 04:16 PM   #1486
bcmbob is offline bcmbob  United States
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This may be a little off topic and only applies to PC driven systems. It is very informative about output modes in general and JRMC specifically .Hopefully useful to many.

JRiver Media Center 17 In Detail | Computer Audiophile
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Old 31st March 2012, 05:02 PM   #1487
YohY is offline YohY  United Kingdom
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Quote:
Originally Posted by bcmbob View Post
This may be a little off topic and only applies to PC driven systems. It is very informative about output modes in general and JRMC specifically .Hopefully useful to many.

JRiver Media Center 17 In Detail | Computer Audiophile
A nice little tip that, Thanks bcmbob !
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Old 2nd April 2012, 09:52 AM   #1488
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I am planning to order the transformers (I am going to use two separate transformers, I have enough space in the CD4000 player).

Which voltage and current should I order? I assume 2 x 15V and 1 x 9V is needed. What currecnt? Is 2 x 250 mA (0,25Amps) enough?
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Old 2nd April 2012, 10:44 AM   #1489
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if you are planning on using separated transformer, yes you can use those values you mentioned

for the 9v transformer, 250mA is enough, but for the 2x15V, i suggest you go with a minimum 0.5A
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Old 2nd April 2012, 11:00 AM   #1490
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I wonder why 9v transformer is needed at all if U4 is some kind of preReg for U5 +3.3v. Pehaps some 5-6VAC would be enough?
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