DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 34 - diyAudio
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Old 12th July 2011, 11:55 AM   #331
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Default Hot Running

On my DAC kit .. a non-assembled version.. it says

" MINI2496: Just use a dual-AC13-15V power supply and a set of AC9-15V single power supply. Can also short the PCB on the back of the two pads, so a dual-AC13-15V power supply can work. Reduces power requirements. Transformer can be greater than 10 watts." (This is an exact copy of the translated material.

I am wondering if there is any relationship between overheating and dropping the 9V input in favor of the dual AC13-15V? I can see the simplicity gained but perhaps the voltage drop is causing the overheating. Can anyone comment on their experiences with both forms of power connection?
Also, the wattage rating for the transformers supplied for the assembled kits is 30VA. This seems pretty safe considering that 10VA or more is suggested.

George
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Old 12th July 2011, 05:07 PM   #332
Trebla is offline Trebla  United Kingdom
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I have got the pads shorted and just using one transformer.
Yes it gets quite warm but not overheating in my opinion.
There again i'm not using an op-amp, so that must be less strain on everything.
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Old 13th July 2011, 06:26 PM   #333
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okay so, my conclusion is this dac is a stellar performer, such focus, power and speed with incredible details has to be heard....for 40$
okay so i've got single 12V battery, mix of oscons(for supply) and tantalums(filter especially),one FC,siemens(epcos) sikorel, silmic for analog supplies and direct cap out mode and currently developing pcb for crc -lm317-c-7812-C(all bypassed with ceramic or mkt/mkp) with a total of 10 000uF directly to lm1117s...lm317 has mighty PSRR for 50hz and upto khz and 7812 deals better with higher harmonics
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Old 13th July 2011, 07:43 PM   #334
Trebla is offline Trebla  United Kingdom
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Good stuff.

How much difference did the mods make?
Mine isn't theoretically run in yet, and unmodded.
About half way perhaps.
I find it extremely laid back and yet detailed at the same time.
Very different to the Lampucera.
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Old 14th July 2011, 03:49 PM   #335
bismuth is offline bismuth  France
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Hi,

My unmodded AK4396 version has an offset of 2mv on left output (0mv on right). Did your boards have DC offset too ?

Thx,
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Old 15th July 2011, 07:15 AM   #336
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Hello,
My unmodded DAC with AK4396 outputs 1,32 mV on the right channel and 7,23 mV on the left channel in idle mode. Is that a big problem? What can I do about it?
Thanks,
Jeff
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Old 15th July 2011, 06:11 PM   #337
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Default Component numbering

Clave, just wondering where the component numbers in your BOM come from?

My board (i got the kit) doesn't have numbers (C22, C23 etc...). I can probably figure things out but it's going to be much easier matching up your numbers with components on the board.

Did anyone else get the kit from zoe_tsang without any screw terminals supplied??
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Old 15th July 2011, 07:11 PM   #338
r8833 is offline r8833  Canada
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Quote:
Originally Posted by mrwireless View Post

My board (i got the kit) doesn't have numbers (C22, C23 etc...). I can probably figure things out but it's going to be much easier matching up your numbers with components on the board

check out post #95 page 9

Last edited by r8833; 15th July 2011 at 07:14 PM.
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Old 15th July 2011, 07:18 PM   #339
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cheers.
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Old 15th July 2011, 07:26 PM   #340
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Quote:
Originally Posted by mrwireless View Post
Clave, just wondering where the component numbers in your BOM come from?
The most updated version is in this post.

In the starting post of the thread you'll find the schematic with same numbering.
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Last edited by ClaveFremen; 15th July 2011 at 07:34 PM. Reason: Sorry, wrong link...
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