diyAudio - Reference TDA1541A DAC

Reference TDA1541A DAC

Tube Rectifier Comparison with SSHV in between

Posted 16th September 2011 at 12:14 PM by dvb projekt
Updated 30th November 2016 at 09:25 AM 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 of

...

dvb projekt

diyAudio Member

Posted in Reference TDA1541A DAC, Project builds

Views 3122 Comments 6 dvb projekt is offline

Best source for TX2575 Naked Z-Foil Resistor

Posted 28th August 2011 at 07:52 AM by dvb projekt
Updated 28th July 2014 at 10:12 AM by dvb projekt

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

the TX2575 Naked Z-Foil,

could order it direct at Texas Components.

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, 1174 views)

dvb projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 5613 Comments 2 dvb projekt is offline

Digital Input Modules Power & Signal Schematic

Posted 8th May 2011 at 04:48 PM by dvb projekt
Updated 30th November 2016 at 09:28 AM by dvb projekt

On request the section of my digital input modules

dvb projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 2210 Comments 3 dvb projekt is offline

External PSU finished

Posted 2nd May 2011 at 07:02 PM by dvb projekt
Updated 30th November 2016 at 09:46 AM 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

Views 1913 Comments 4 dvb projekt is offline

The final parts for the Reference DAC Case

Posted 25th April 2011 at 10:26 AM by dvb projekt
Updated 30th November 2016 at 09:54 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

...

dvb projekt

diyAudio Member

Posted in Project builds, Reference TDA1541A DAC

Views 2081 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
Updated 30th November 2016 at 09:56 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 1443 Comments 0 dvb projekt is offline

The PSU case

Posted 17th April 2011 at 11:45 AM by dvb projekt
Updated 30th November 2016 at 09:58 AM 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 1877 Comments 5 dvb projekt is offline

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