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Old 5th March 2014, 10:39 PM   #651
Bunpei is offline Bunpei  Japan
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Hi, michyy!

Mr. Yamazaki of Tachyon has a plan for releasing the next batch of Chiaki's DAC.
Please send your estimate request to him.
jack < at > mtc < dot > biglobe < dot > ne < dot > jp

Bunpei
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Old 11th April 2014, 04:15 AM   #652
acko is offline acko  Australia
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Unsurpassed performance from this SDTrans384!
Well done

Remote connectivity for status and control will make it more attractive.
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Old 23rd April 2014, 01:17 AM   #653
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Hi Bunpei,

I have in my hands the SyncDAC. I did not purchase the I/V PCB from Tachyon because I have transformers that I can use.

I can see an example of how transformers can be connected to the PCB's here:

MicroSD Memory Card Transport Project

I cannot make out the exact pin connections.

Is it possible for you to clarify using the SyncDAC connections for use with I/V other than Chiaki's I/V?

Kind regards,
Jeff
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Old 23rd April 2014, 02:28 PM   #654
Bunpei is offline Bunpei  Japan
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Hi, Jeff!

It's very nice to hear from an owner of Chiaki's DAC board.

Here are markings, CN13, CN14, CN2 and CN3 for 4-pin headers.
Let's assign pin #1 as the nearest pin located to those CN markings.
Pin #1, Pin #4 ___ GND
Pin #2 ___ in-phase of balanced output
Pin #3 ___ out-of-phase of balanced output

Is this explanation clear enough for you?
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Old 25th April 2014, 04:23 AM   #655
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Hi Bunpei,

Thank you for your reply.

Both CN2 and CN3 headers are outputs for L Ch
Both CN13 and CN14 headers are outputs for R Ch

From the photo I linked in my last message, it appears the two outputs for each channel are paralleled before feeding into the transformer.

Is this correct?

Kind regards
Jeff
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Old 25th April 2014, 01:20 PM   #656
Bunpei is offline Bunpei  Japan
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Yes, your guess is correct.

CN2, CN3, CN13 or CN14 is a merged output of 4 DACs at one side of ES9018.
As far as you use your transformer I/V, I think it's better for you to tie
CN2 & CN3 and CN13 and CN14 to obtain more power.

When you use an OpAmp-based I/V module, an output given by 8 DACs in parallel might bring too much current.
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Old 27th July 2014, 02:55 PM   #657
CFT is online now CFT  United States
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Quote:
Originally Posted by Bunpei View Post
Hi, michyy!

Mr. Yamazaki of Tachyon has a plan for releasing the next batch of Chiaki's DAC.
Please send your estimate request to him.
jack < at > mtc < dot > biglobe < dot > ne < dot > jp

Bunpei
Hi Bunpei san,

Will there be a next batch? Looking forward to it!!
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Old 27th July 2014, 05:33 PM   #658
CFT is online now CFT  United States
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Quote:
Originally Posted by CFT View Post
Hi Bunpei san,

Will there be a next batch? Looking forward to it!!
Oh...just found out from Yamazaki san's website that all from the fourth batch have been sold out at end of May...

But the good news is.....there will be a next lot!…. Just sent him an email to place an order for one.

Last edited by CFT; 27th July 2014 at 05:41 PM.
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Old 28th July 2014, 11:57 PM   #659
Bunpei is offline Bunpei  Japan
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Hi, CFT!

Mr. Yamazaki has no stock right now. He has no finalized plan for the next batch release now. However, he may prepare it as soon as he receives a certain amount of reservations or pre-orders.

Bunpei
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Old 29th July 2014, 03:12 AM   #660
CFT is online now CFT  United States
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Thanks Bunpei san. Hope there will be enough interest for the next batch soon.
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