diyAudio - Reference TDA1541A DAC

Reference TDA1541A DAC

NOS TDA1541A double crown

Posted 27th January 2012 at 04:54 PM by dvb-projekt

I am a lucky man!

I´ve got two NOS TDA1541A double crown DAC´s from a friend

He bought the last from Philips a long time ago...

Just now i swapped them on my Red Baron modules...

What could i say.... They will never leaving the DAC modules again !!!

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

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Tube Rectifier Comparison with SSHV in between

Posted 16th September 2011 at 12:14 PM by dvb-projekt
Updated 16th September 2011 at 04:38 PM by dvb-projekt

Vin= SSHV input / Vout= SSHV output

Because i am on vacation, i had the time to listen to two other tube rectifier i have.

The question, if there are still differences in sound with different tube rectifiers and the SSHV in between, is

YES !!!

Till now i used the Bendix 6101, a very nice sweet and soft sounding rectifier.

After i roll to the SED Winged "C" 5U3C (5U4-G) Black Plate rectifier,

...someone lift a invisible curtain...

Much more precision in the mids and highs and the soundstage open up in all directions.
Jesus, in comparison the Bendix sounds much to soft!

The Mullard GZ37/CV378 Coke Bottle has also the qualities of the 5UC3 Black Plate,
but is a bit softer sounding.

The only disadvantage

...

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 881 Comments 2 dvb-projekt is offline

Best source for TX2575 Naked Z-Foil Resistor

Posted 28th August 2011 at 07:52 AM by dvb-projekt

All members who want to use the "holy grail" audio resistor,

the TX2575 Naked Z-Foil,

could order it direct from Arbie Lopez at Texas Components.

alopez@texascomponents.com

That´s the cheapest way to get it IMO.

They have also great Trimpots with Bulk Metal Foil Technologie.

P.S.: If you send a mail to Arbie, send her regards from me!

Attached Files

5 Reasons to Specify Bulk Metal Foil Pots.pdf (800.9 KB, 389 views)

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 1098 Comments 1 dvb-projekt is offline

The complete DDNF I/V Output Stage

Posted 19th June 2011 at 02:14 PM by dvb-projekt

Transformer input voltage: 3* 24VAC
Shunt input voltages: 3* 32VDC
Shunt pot value: 3* 5k0
Heatsink Rth: 3,7 K/W or better

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

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Digital Input Modules Power & Signal Schematic

Posted 8th May 2011 at 04:48 PM by dvb-projekt

On request the section of my digital input modules

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 885 Comments 3 dvb-projekt is offline

External PSU finished

Posted 2nd May 2011 at 07:02 PM by dvb-projekt

After a long weekend , i have finished the external PSU!

Here are some internal view pictures.

On the upper side the two +/- Power Supply Modules,
in the lower left corner the 10H choke on amorphous cores from AE-Europe,
in the middle the 1st cap (3,9µF Mundorf supreme silver in oil) of the HV-PSU line,
in the lower right corner the Power Switch Module with onboard solid state relays.

And some close-up pictures

...

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

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The final parts for the Reference DAC Case

Posted 25th April 2011 at 10:26 AM by dvb-projekt

On the left side

USB-Isolator from Circuits@Home

Teralink X2 USB to I2S converter (with my modification)

TDA1541A Salas shunt reg. module

+5V Salas shunt reg. module
(downlink side of USB isolator incl. +5V line of Teralink X2/ Twisted Pear WM8804 / Ultra highspeed buffer module / I2S switch)

+3,3V Salas shunt reg. module (+3,3V line of Terlink X2)

In the middle

Twisted Pear WM8804 SPDIF to I2S converter

On top the Ultra High Speed Buffer module

I2S switch

2* TDA1541A DAC module with direct input shunt mod.

On the right side

2* SSHV-Shunt module (one for each channel)

Tube-I-zator V2.0
(the remaining parts of the onboard HV-PSU are not necessary,
because of the Tube-Rectifier

...

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 878 Comments 0 dvb-projekt is offline

High Voltage schematic for the Reference DAC PSU

Posted 20th April 2011 at 08:21 AM by dvb-projekt

Here you could see the final schematic for the HV lines.

The two 40mA current taps are the SSHV-Shunt´s,
one for each channel on the Tube-I-zator.

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 677 Comments 0 dvb-projekt is offline

The PSU case

Posted 17th April 2011 at 11:45 AM by dvb-projekt
Updated 4th May 2011 at 01:01 PM by dvb-projekt

Finally the engraved top-, front- & backplate arrived.

Surely you are asking yourself, why i made a 1mm deep square around the place for the transformer...

...now here is the answer

I´ve got a perfect aluminum transformer housing and now it sits perfect without an air gap.

Now it´s time to assemble the parts.

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 584 Comments 2 dvb-projekt is offline

Salas Shunt Module direct input modification

Posted 7th April 2011 at 02:50 PM by dvb-projekt

What can i say...

STRONGLY RECOMMENDED

Quote:

Originally Posted by Malka07

Soooooo enough of how i did it, how does it sound?
is it better then with the tl431 shunts on board?
well the answer is a
BIG YESSSSSSSSSSSSSSS

From the first 3 notes coming out of the speakers i knew it was much much better sounding then with the tl431's
(this also confirmed by people i played music to, saying 'WOW' out loud within the first 3 notes being played!!!)
the soundstage is deeper, wider higher, very 3d sounding, lots of air inbetween instruments, there location is now easily identifiable,
detail amazingly has also improved (i thought it was already very detailed) now i hear things i never did before.
Even the bass

...

dvb-projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 862 Comments 0 dvb-projekt is offline

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