I made today a few modification at the Tube-I-zator Module.
First i insert receptacle pins for all resistors in the tube stage.
So it´s easy to change the values without soldering if necessary.
Second i changed the Rk & R I/V resistors to my beloved TX2575.
It is really fascinating, what these resistors do to the sound.
The last thing for now are the output caps. I changed to Ampohm 2,2 µF polyester in oil, bypassed by the russian K72P-6 teflon.
Now it´s time to fine-tune the sound with the right output caps....😛
One thing is clear. This new "Reference DAC" project here, outperforms my really perfect sounding "Big Blue" 4x TDA1541A DAC with all his modifications and with it´s tube-rectifier stage.
So this and the fact that i don´t need two DAC´s is the reason, why i sell my "Big Blue" DAC pcb here!
First i insert receptacle pins for all resistors in the tube stage.
So it´s easy to change the values without soldering if necessary.
Second i changed the Rk & R I/V resistors to my beloved TX2575.
It is really fascinating, what these resistors do to the sound.
An externally hosted image should be here but it was not working when we last tested it.
The last thing for now are the output caps. I changed to Ampohm 2,2 µF polyester in oil, bypassed by the russian K72P-6 teflon.
An externally hosted image should be here but it was not working when we last tested it.
Now it´s time to fine-tune the sound with the right output caps....😛
One thing is clear. This new "Reference DAC" project here, outperforms my really perfect sounding "Big Blue" 4x TDA1541A DAC with all his modifications and with it´s tube-rectifier stage.
So this and the fact that i don´t need two DAC´s is the reason, why i sell my "Big Blue" DAC pcb here!
Hi Maurizio,
perhaps it make sense, that we make a list for members who want to have the pcb´s.
So we could see if it make sense to start a new GB.
Pre-Order List
+/- Power Supply Module
- nickname
Shunt regulator Module for TDA1541A
- nickname
Shunt regulator Module for add. +5V line
- nickname
TDA1541A DAC Module
- nickname
All who are interested, could insert the nickname in the fields under the Module description.
At the moment i start a pre-order list to see how much interest is out there in the community.
If there is enough pre-ordered pcb´s, i will start a GB.
Please write in the pre-order list the wanted pcs, thanks.
If there is enough pre-ordered pcb´s, i will start a GB.
Please write in the pre-order list the wanted pcs, thanks.
To make things easier, i made a google excel sheet for all who want to sign in for a GB.
Please click the link in my signature!
Please click the link in my signature!
Hi Oliver..
I would like to assemble a 4x1541 DAC..how many pcb i need relating to power supply..shunt regulators...etc..?
THanks.
I would like to assemble a 4x1541 DAC..how many pcb i need relating to power supply..shunt regulators...etc..?
THanks.
Hi Maurizio,
you need:
2x +/- Power Supply Module
1x Shunt regulator Module for TDA1541A
1x Sunt regulator Module for add. +5V line
4x TDA1541A DAC Module
and
1x output buffe stage, e.g. Tube-I-zator
1x S/PDF to I2S module, e.g. Doede Douma or from Twisted Pear Audio
Best,
Oliver
you need:
2x +/- Power Supply Module
1x Shunt regulator Module for TDA1541A
1x Sunt regulator Module for add. +5V line
4x TDA1541A DAC Module
and
1x output buffe stage, e.g. Tube-I-zator
1x S/PDF to I2S module, e.g. Doede Douma or from Twisted Pear Audio
Best,
Oliver
just solder those TX2575 in there already; you know they are gonna stay 😉
nice dac mate, really like your choice of components. the new KG nichicons are great caps, only beaten as far as lytics go, by the new titanium mundorf. i'm keen to try the new silk nichicons.
i'll be watching this GB to see that ut gets off the ground and grab some of the power supply PCBs
nice dac mate, really like your choice of components. the new KG nichicons are great caps, only beaten as far as lytics go, by the new titanium mundorf. i'm keen to try the new silk nichicons.
i'll be watching this GB to see that ut gets off the ground and grab some of the power supply PCBs
You can use also 8 TDA Modules with the Shunt regulators. The only value that must be changed is the 5W resistor.
Hello Oliver..
So i don't need more psu pcbs and shunt regulators..
About 8 TDA1541...is too much..? What do you think?
Thanks.
So i don't need more psu pcbs and shunt regulators..
About 8 TDA1541...is too much..? What do you think?
Thanks.
Hi Guys, I hope you don't mind me butting in! I normally hang out on the CD650 thread and the CD63 thread. I have a heavily modded philips CD960 (almost the same as Marantz CD94) and I'm interested in a new TDA board so I can fit more PSU's in my player.
Maurizio, in my experience, the more seperation you can give in the PSU the better. Oliver has said that it will work. However, I would be looking to run multiple shunt regs for best perfomance. You could maybe start with 1 then add more????
Regards, Ian
Maurizio, in my experience, the more seperation you can give in the PSU the better. Oliver has said that it will work. However, I would be looking to run multiple shunt regs for best perfomance. You could maybe start with 1 then add more????
Regards, Ian
The shunt regulator design from Salas runs up to 1A per rail without problems, but you need an adequate heatsinks.
Think about max. 4xTDA´s.
You could easily check the differences from 1x to 2x or 4x. If it is worth it, you could use more TDA´s after that.
Think about max. 4xTDA´s.
You could easily check the differences from 1x to 2x or 4x. If it is worth it, you could use more TDA´s after that.
In your opinion, would individual 'clean' supplies be an upgrade over shared ones?
No, not with Salas shunt regulator circuit on the pcb if it is set to the correct parameters.
You could test it for sure, but in my opinion you won´t get a audible advantage.
You could test it for sure, but in my opinion you won´t get a audible advantage.
Looks very interesting. What are the prices for the pcbs (full package incl shunt reg, psu, tube-i-zator etc)?
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