Teralink X2 clock mod. with Tentlabs XO - diyAudio
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Old 9th December 2010, 01:31 PM   #1
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Default Teralink X2 clock mod. with Tentlabs XO

Hi to all.
After longer use in my own DAC project and studying the circuit, i thought about some X2 modifications.

1st was the PSU.
The +5V line is now driven by one of my +5V Salas shunt reg. modules,

Click the image to open in full size.

Click the image to open in full size.

witch gave a big step forward in SQ.
A 2nd shunt reg. for the 3.3V line is nearly ready to fire up.

Click the image to open in full size.

I am really curious about this step.


2nd was the adding of an USB-Isolator between my iMac and the USB input.
You could read a small review here.

3rd step yesterday was the clock on the X2, witch i swapped to a Tentlabs HighEnd XO.

Here a short descripiton:

Click the image to open in full size.

Click the image to open in full size.

Desoldered original TCXO.

Click the image to open in full size.Click the image to open in full size.

DIP14 socked with additional RF choke and decoupling cap.

Click the image to open in full size.

Soldered socket.

Click the image to open in full size.

Tentlab XO in position.


Conclusion:

All three mod. shift the SQ to a higher level and are highly recommended.
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Old 9th December 2010, 02:09 PM   #2
Jogi is offline Jogi  Germany
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H Oliver,

nice work! I also have a Teralink and was pretty underwhelmed by its performance in the beginning, but now, after burn-in and with a shunt its really nice.

Is the Tent-Clock also working with 5V?

Please tell all of us about the 3.3V shunt thng, this is also what I am planning to do, but always good when someone else can share experiences first.
I guess the ADUM chip would benefit from a shunt, too...

cheers,

Juergen
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Old 9th December 2010, 02:32 PM   #3
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Hallo Jogi,

The Tentlab XO runs also with +5V, yes. So its very easy to integrate it on the pcb.

As we have two voltage lines in the X2 (+5V & +3.3V), i am planning to feed the +3.3V line also with one of my
shunt modules and get rid of this onboard 3.3V line regulator.

For this, the +5V shunt module must be lightly modified, as you could see on the photo above. Thats all.


Viele Gre
Oliver
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Old 10th December 2010, 12:09 PM   #4
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Default Shunts board

Quote:
Originally Posted by dvb-projekt View Post
Hallo Jogi,

The Tentlab XO runs also with +5V, yes. So its very easy to integrate it on the pcb.

As we have two voltage lines in the X2 (+5V & +3.3V), i am planning to feed the +3.3V line also with one of my
shunt modules and get rid of this onboard 3.3V line regulator.

For this, the +5V shunt module must be lightly modified, as you could see on the photo above. Thats all.


Viele Gre
Oliver

hi Oliver,

I was told that for 3.3V operation for the shunt board, output cap and the cap near the trimmer can be change to 47uF and 1000uF-2000uF for better bandwidth...I did this and it works well.

heat sink is hot (60-70C) but works fine, maybe because of the high Vi.

BTW do you have M2Tech hiface to compares with the X2 after this mod???
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Old 10th December 2010, 12:22 PM   #5
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Quote:
Originally Posted by gabanyayaya View Post
BTW do you have M2Tech hiface to compares with the X2 after this mod???
Hi,

for my DAC i use only I2S input, so only the M2Tech hiface-EVO works.
I dont have a hiface-EVO and couldnt do this comparsion, sorry.
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Old 10th December 2010, 12:30 PM   #6
Jogi is offline Jogi  Germany
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Thanks Oliver...

Btw there is another GB from Quanghao for low voltage shunt boards, the 1,5-5V version is included. I have them here, nice and easy to work with and reasonably small, including rectification and smoothing cap. I am so happy about these Salas shunts, big big sound for small small $$$...

I would also be interested in a comparison M2tech and Teralink; biggest advantage for the Teralink is the possibility to use the Adum isolator, and it is easier to tweak, due to its size.
So far I really like the Teralink, but i do not have something to compare it to...Changing the little green 0,1F caps in the output and the resistors for something better also gave a nice improvement. I had some nice film/foil caps and 330R/100R Takman resistors in the box, so no big deal to try out.
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Old 11th December 2010, 02:09 AM   #7
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Default USB isolator & 192khz/24b

oliver

i can't see very clear the lead position of the ferrite bead and the wima caps on the adapter.

can the x2 handles 192khz/24bit data?
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Old 11th December 2010, 06:19 AM   #8
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Here is the overview of the lead positions


Click the image to open in full size.


The X2 can handle up to 96KHz/24bit.
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Old 12th December 2010, 05:35 AM   #9
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Hi, What a amazing work, I have an External Teradak DSIX + Re-Clock board, do you think the TXCO can be swapped like you did? Thanks.

Click the image to open in full size.

Last edited by jeffery8341; 12th December 2010 at 05:39 AM.
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Old 12th December 2010, 08:09 AM   #10
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Quote:
Originally Posted by dvb-projekt View Post
Here is the overview of the lead positions


Click the image to open in full size.


The X2 can handle up to 96KHz/24bit.
thanks oliver,

BTW for this kinda mod can it be applies and implemented to every digital devices with a XO like a CDP or maybe a DAC board or any usb converter?

Regarding you USB isolator is it necessary to runs it with a Independent shunts?
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