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Old 2nd May 2009, 01:15 PM   #421
surfstu is offline surfstu  United Kingdom
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thanks very much marc...

i recieved my dac today, i opted for the toroidal transformer that came with it. Its has a +8v and a 0 which i presume is the only connection i need to make to the dac board if I am bypassing the opamps.

It also has a +13v, 0, -13V winding. This question is really aimed at Johnm or any others who have been following the shigaclone thread. I am making the psu from the pdf file on page 2 of the shigaclone thread. Do you think it is possible to use the +13 0 -13V windings to power the cd player? is there any benefit of making the cd player in the same unit as the dac?

I don't think i can get too heavily involved in soldering on the dac board as it looks pretty fidly to me.

cheers stuart
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Old 2nd May 2009, 02:46 PM   #422
udovdh is offline udovdh  Netherlands
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Quote:
Originally posted by legarem
Here is the schem showing how to connect these transformers.
Thanks!
Does this also work for the Studers?

I think I'll order my DAC board this week. Anything special I should ask?
Of course the board, oversampler, what DAC chip is preffered and why?
Etc?
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Old 2nd May 2009, 02:49 PM   #423
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Quote:
Originally posted by legarem
Here is the schem showing how to connect these transformers.

legarem - brilliant, thank you very much. If it is okay, I will use the same as I do not know any better!
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Old 2nd May 2009, 07:09 PM   #424
legarem is offline legarem  Canada
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Quote:
Originally posted by udovdh


Thanks!
Does this also work for the Studers?

I think I'll order my DAC board this week. Anything special I should ask?
Of course the board, oversampler, what DAC chip is preffered and why?
Etc?

If the studers are 600 to 600 ohms transformers the secondary load I use on the schem should be correct. The way I use to correctly load to transformers can also be done by ears. Anyway, I always use signal generator and oscilloscope and I finish by ears to determine the best load to use.
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Old 2nd May 2009, 08:12 PM   #425
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Quote:
Originally posted by legarem



If the studers are 600 to 600 ohms transformers the secondary load I use on the schem should be correct. The way I use to correctly load to transformers can also be done by ears. Anyway, I always use signal generator and oscilloscope and I finish by ears to determine the best load to use.

What resistor type do you use/recommend for this? Thanks.
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Old 3rd May 2009, 02:37 AM   #426
legarem is offline legarem  Canada
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Quote:
Originally posted by hoverdonkey



What resistor type do you use/recommend for this? Thanks.
Good question.

For mellow sound, you can use carbon film. (Riken if high end resistors is used) For more detailed sound, metal film gives crispier sound (Holco)

For my taste, Mills wirewound non inductive gives neutral sound.

The secondary loading resistors affect the tonal balance so you can 'taylor' the sound by using different kinds of resistors. Same for the ones in series with the primary.

The TAMS impress me. The best way to describe them is MUSICAL. This is the BEST bargain transformers you can probably find.
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Old 3rd May 2009, 02:47 AM   #427
legarem is offline legarem  Canada
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I'm so in love with the Tams, I bought another pair
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Old 3rd May 2009, 02:59 AM   #428
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Thanks for the resistor tips legarem, I will see what I can get hold of.

Also, thanks for the updates on the Tams - you have made me very happy that I have a pair coming. Just what I needed after a loooong night of beating my wireless network into submission!
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Old 5th May 2009, 03:12 PM   #429
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I have been reading this thread with great interest.

I bought the small version of this board with the CS4397 a while back. I have made quite a few changes to it as suggested by Leo on theartofsound forum.
http://<a href="http://theartofsound....php?t=315</a>

After reading through this thread I decided to buy a pair of the Tamura output transformers off ebay.

Does anybody have a view on how well they will work with the CS4397, and will the resistor values posted by legarem in post #418 be suitable for the CS4397.

What power rating should the resistors be?
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Old 6th May 2009, 12:08 AM   #430
legarem is offline legarem  Canada
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Quote:
Originally posted by fordgtlover
I have been reading this thread with great interest.

I bought the small version of this board with the CS4397 a while back. I have made quite a few changes to it as suggested by Leo on theartofsound forum.
http://<a href="http://theartofsound....php?t=315</a>

After reading through this thread I decided to buy a pair of the Tamura output transformers off ebay.

Does anybody have a view on how well they will work with the CS4397, and will the resistor values posted by legarem in post #418 be suitable for the CS4397.

What power rating should the resistors be?
The resistors I use are 1/2 watt. 1/4 watt should also be ok.

About the circuit with Tamuras proposed with the CS4398, it will be the same for the CS4397.
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