Teralink X2 clock mod. with Tentlabs XO

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jeffery8341

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Joined 2010
dvb-projekt said:
Jefery,

your pcb works with +5V (LM1084-5 output = +5V).

What would be interesting is the needed current. BTW, never ever 1A!
Measure the current. If it is under 80mA, you could use the Tentlab plugin shunt.
If it´s more, you could use quanghao´s Salas shunt here.

I am sure Guido Tent ships also to Taiwan ;)
Click to expand...

Hi Oliver, I am using a 12V-1A adaptor for this board at present , the sound quality is very good, I am also sure if I swap the TXCO to Tentlab as you did, sound quality will be much much better, BUT......I am a electronic idiot, I can do a little modification, for example, swap the OP-amp , but if talk about voltage or current, I would rather hang myself....:D

Oliver, Another question please, my USB sound card is Musiland 01USD, I think if the Teralink X2(before your modification) is better than 01USD, the only reason will be the Teradak TXCO, since I already have a the DSIX board with a better TXCO, do you think I still need to replace 01USD with Teralink X2?

Thanks again.
 
J

jeffery8341

Member
Joined 2010
dvb-projekt said:
Jeffery,

because i don´t know the Musiland, i couldn´t answer this question.
Perhaps some other members do this comparison.

Best,
Oliver
Click to expand...

Oliver,

I have google some forum, some people think Musiland 01USD is better, some people think Teralink X2 is better, what I think is the Teralink X2 you midified is definitely better. :)

There will be a new USB soundcard of Musiland come out in next few months, it is much better than 01USD, 01USD use 50.000-gate FPGA, 01PSD use 250,000-gate FPGA, same as RME9632.

By the way, Oliver, I saw your flag, you are German, so can I ask you a question about a German audio product via PM?
 
dvb projekt

dvb projekt

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Joined 2009
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Additional modification added

As posted before, i canceled the original TCXO LC onboard filter in the +5V line,
because the Tentlab XO had it´s own at the socket.

An externally hosted image should be here but it was not working when we last tested it.



2nd modification is the I2S Buffer-IC.

I change the 74HC125 (tPD: 8ns) to the ~53% faster 74VHC125 (tPD: 3.8ns).
This will reduce the added jitter of the Buffer-IC.

At desoldering, i unhitch two solder pads... :eek: What a work to fix this problem!

This is no work for rookies ;)

An externally hosted image should be here but it was not working when we last tested it.


So let´s power up and listen again :p

:cheers:​
 
dvb projekt

dvb projekt

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Joined 2009
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Last modification added

Now my last modification is done.
The X2 get´s now the 2nd Salas shunt regulator for the 3.3V line.
Therefore the onboard 3.3V reg. and the 100µF cap on it´s output is canceled.

An externally hosted image should be here but it was not working when we last tested it.


The +5V salas shunt reg goes directly to the downlink side of the USB-Isolator and from there over the USB connector into the X2.

An externally hosted image should be here but it was not working when we last tested it.


Here you see the shunt modules. The upper one for the +5V line (USB-Isolator downlink & X2), the lower one for the 3.3V line (X2 Tenor chip).

An externally hosted image should be here but it was not working when we last tested it.


:cheers:


Jesus Christ... :eek: ...What an improvement!
That kicks me out of my chair :cloud9:

My recommendation:
Never, and i mean never, let the X2 play with the onboard voltage regulators,
especially the 3.3V one!

I must go back to my chair and listen again :D​
 
Last edited:
ernesternest

ernesternest

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Joined 2007
Paid Member
dvb-projekt said:
Now my last modification is done....

Jesus Christ... :eek: ...What an improvement!
That kicks me out of my chair :cloud9:

My recommendation:
Never, and i mean never, let the X2 play with the onboard voltage regulators,
especially the 3.3V one!

I must go back to my chair and listen again :D​
Click to expand...

Oliver, wow, thanks for your listening impression! I'm really looking forward to applying the mods.......

Cheers Ernst
 
crt

crt

Member
Joined 2007
Thank's for the answer
Ok, i will follow you to make separated supply for 5Volt and 3.3Volt
BUT still using onboard Clock :)

btw
When i plug the Teralink to my USB Computer, it recognize by windows even i did not give a power to Teralink
Is this normal ? i mean, This Device can work using USB power only ?
 
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