DAC 2496 (AK4393) DAC KIT With CS8416+AK4393+5532 - Page 235 - diyAudio
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Old 24th December 2012, 11:40 AM   #2341
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Hi, A question. I had actually used 170R instead of the recommended 150R as I did not have them available. They were normal 5% tolerance carbon comp resistors. Should I bother changing? My reasoning was that being part of LPF that might change the frequency cut off a bit but not too much.
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Old 1st January 2013, 09:39 AM   #2342
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A quick question.

I have ordered a 4393 kit, which I am going to upgrade.

However I see that the 4396 is a better beast.

The question I have is this, is it possible to replace the 4393 with a 4396 chip.
I assume the LPF resistors would need to be changed.

Is there anything else which would need to be changed to accommodate a 4396 chip?

Also is ebay the best source for a 4396 chip?

Many thanks.
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Old 1st January 2013, 10:42 AM   #2343
erin is offline erin  Australia
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Quote:
Originally Posted by Holmes81 View Post
is it possible to replace the 4393 with a 4396 chip.
Yes. Direct replacement.
Quote:
Originally Posted by Holmes81 View Post
Is there anything else which would need to be changed to accommodate a 4396 chip?
As you said, install the AK4396 datasheet LPF values.
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Originally Posted by Holmes81 View Post
Also is ebay the best source for a 4396 chip?
Yes
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Old 1st January 2013, 11:09 AM   #2344
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Brilliant,

Thanks for the response.
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Old 1st January 2013, 03:09 PM   #2345
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@Holmes81 - Its not easy to desolder/solder such chips. There are quite a few videos on youtube which you can check by searching for SMD soldering.
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Old 4th January 2013, 10:57 PM   #2346
Djinn is online now Djinn  Norway
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Default 160 Ohm Riken alternative

The Riken 160 Ohm seems impossible to source but has anyone tried the Shinkoh 150 Ohm tantalum resistors on the input to the opamp?

In my 4396 kit all the resistors on the output is 1K Ohm and not 2.4K Ohm, but according to Darios Upgrade BOM I am putting in 2.4K Ohm PRP 1/4 Watt, that I found availiable at Hificollective.

PS? I am going to use the OPA827 on the Blackdog adapter as opamp

With kind regards and hello to you all

Martin
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Old 4th January 2013, 11:33 PM   #2347
Reality first!
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Quote:
Originally Posted by Djinn View Post
The Riken 160 Ohm seems impossible to source but has anyone tried the Shinkoh 150 Ohm tantalum resistors on the input to the opamp?
Hi Martin,

Use a plain carbon film then , IMHO the Shinkoh is too much colored.

Quote:
Originally Posted by Djinn View Post
In my 4396 kit all the resistors on the output is 1K Ohm and not 2.4K Ohm,
It's normal all kits are shipped with LPF parts for AK4393

Quote:
Originally Posted by Djinn View Post
but according to Darios Upgrade BOM I am putting in 2.4K Ohm PRP 1/4 Watt, that I found availiable at Hificollective.
Perfect.
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Old 5th January 2013, 06:54 AM   #2348
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Hi, Are these values so critical? I found only 170 Ohms in my goody bag and they seemed to work out ok. Will a few ohms make a big difference on the LPF?
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Old 5th January 2013, 07:28 AM   #2349
atupi is offline atupi  Romania
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170 ohm will do the job very well.
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Old 7th January 2013, 10:40 AM   #2350
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I thought I should give a heads up to AudJade (Ma Lee) - I bought some Silmic11s and a dual-to-mono OPA627(s/hand op-amps) module from him.

They arrived today, superbly packed, the op-amp module in anti-static packaging and acccompanied by something I have never seen before - two rubber fingers (imagine miniature condoms) to handle them with - what a brilliant idea. I actually use very thin white cotton gloves, cheap as chips when bought in Spain, where I used to live.

Also included was an invoice in correct English (how many non Chinese can write in Mandarin or any other Chinese dialect?

The soldering of the op-amp module is excellant - and yes the pricing is as well - what more can you want. I buy very little in Europe because the attitude is - 'how much can I screw you for'. I also buy in the USA because Americans demand 'bang for the buck' but many sellers there screw you on postage - they don't get my business.

Caveat Emptor - but not in this case - chapeaux AudeJade.
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