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,
[IMGDEAD]http://img844.imageshack.us/img844/2373/img1041h.jpg[/IMGDEAD]
[IMGDEAD]http://img715.imageshack.us/img715/3303/sam0153j.jpg[/IMGDEAD]
witch gave a big step forward in SQ.
A 2nd shunt reg. for the 3.3V line is nearly ready to fire up.
[IMGDEAD]http://img819.imageshack.us/img819/7957/5vto33vmodification001.jpg[/IMGDEAD]
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:
[IMGDEAD]http://img839.imageshack.us/img839/207/screencapturem.png[/IMGDEAD]
[IMGDEAD]http://img405.imageshack.us/img405/8779/sam0215e.jpg[/IMGDEAD]
Desoldered original TCXO.
[IMGDEAD]http://img97.imageshack.us/img97/1108/sam0217.jpg[/IMGDEAD][IMGDEAD]http://img94.imageshack.us/img94/3010/sam02180.jpg[/IMGDEAD]
DIP14 socked with additional RF choke and decoupling cap.
[IMGDEAD]http://img69.imageshack.us/img69/1285/sam0219.jpg[/IMGDEAD]
Soldered socket.
[IMGDEAD]http://img812.imageshack.us/img812/8804/sam0220v.jpg[/IMGDEAD]
Tentlab XO in position.
Conclusion:
All three mod. shift the SQ to a higher level and are highly recommended.
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,
[IMGDEAD]http://img844.imageshack.us/img844/2373/img1041h.jpg[/IMGDEAD]
[IMGDEAD]http://img715.imageshack.us/img715/3303/sam0153j.jpg[/IMGDEAD]
witch gave a big step forward in SQ.
A 2nd shunt reg. for the 3.3V line is nearly ready to fire up.
[IMGDEAD]http://img819.imageshack.us/img819/7957/5vto33vmodification001.jpg[/IMGDEAD]
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:
[IMGDEAD]http://img839.imageshack.us/img839/207/screencapturem.png[/IMGDEAD]
[IMGDEAD]http://img405.imageshack.us/img405/8779/sam0215e.jpg[/IMGDEAD]
Desoldered original TCXO.
[IMGDEAD]http://img97.imageshack.us/img97/1108/sam0217.jpg[/IMGDEAD][IMGDEAD]http://img94.imageshack.us/img94/3010/sam02180.jpg[/IMGDEAD]
DIP14 socked with additional RF choke and decoupling cap.
[IMGDEAD]http://img69.imageshack.us/img69/1285/sam0219.jpg[/IMGDEAD]
Soldered socket.
[IMGDEAD]http://img812.imageshack.us/img812/8804/sam0220v.jpg[/IMGDEAD]
Tentlab XO in position.
Conclusion:
All three mod. shift the SQ to a higher level and are highly recommended.