diyAudio - dvb-projekt

First Watt F5 Amp finished

Posted 19th February 2012 at 11:42 AM by dvb-projekt
Updated 18th May 2012 at 07:07 AM by dvb-projekt (Hifi-Tuning Supreme 3 fuse photo added)

My F5 is ready to burn in

The postman delivered today the last small part for perfection...

The Hifi-Tuning Supreme 3 fuse

dvb-projekt

diyAudio Member

Posted in First Watt F5, Project builds

Views 788 Comments 8 dvb-projekt is offline

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

Views 538 Comments 4 dvb-projekt is offline

First Watt F5 Amp build

Posted 27th January 2012 at 01:53 PM by dvb-projekt
Updated 19th February 2012 at 09:01 AM by dvb-projekt (Project finished)

After reading so much over this amp, i will start a new project for my Hornspeaker

Let´s see if the F5 can play in the same league as my 300B mono´s

The parts

Schaffner FN 2070 - 3A multistage EMI Filter

Antek AS-4218 - 400VA transformer

SST03 Softstart module from Sjostrom Audio
Design without extra transformer

RFB03 rectifier bridge from Sjostrom Audio

with IXYS DPG 60 C 200 HB HiPerFRED diodes

...

dvb-projekt

diyAudio Member

Posted in First Watt F5, Project builds

Views 1524 Comments 2 dvb-projekt is offline

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

TDA1541A DAC Module V3.0

Posted 20th August 2011 at 08:32 AM by dvb-projekt
Updated 4th April 2012 at 07:13 AM by dvb-projekt (Stock status updated)

The Red Baron

aka TDA1541A DAC V3.0

The evolution brings the following changes

- Direct shunt voltage inputs with shortest onboard traces
- I2S In-/Outputs with shortest onboard traces
- Upgrades DEM Synchronizer
- Onboard Grounded-Gate MOSFET Current Buffer I/V Stage
(-ecdesigns- MK7 version)
- Compacter design

Still on the module

- Separate GND-Trace for DEM-Synchroinizer
- Master/Slave connectors for parallel DAC module usage
and external I/V Buffer stages e.g.
Tube-I-zator & DDNF Stage
- Groundplane
- no SMD Design

The PCB has the following data:

Material: FR4 - 2mm
Layers: 2
Board size: 125x73 mm

...

Attached Files

	TDA1541A Project - BOM - for The Red Baron.zip (9.0 KB, 367 views)
	The Red Baron DAC.pdf (28.9 KB, 748 views)

dvb-projekt

diyAudio Member

Posted in Offer

Views 1752 Comments 0 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

Views 922 Comments 0 dvb-projekt is offline

Transformer for Pedja Rogic´s DDNF I/V Stage

Posted 23rd May 2011 at 10:44 AM by dvb-projekt
Updated 23rd June 2011 at 04:12 PM by dvb-projekt

If you would build the DDNF I/V stage with my PSU & Salas Shunt modules,
you could order a custom made transformer at
AE-Europe.

It has the following data:

Primary:

115-0 / 115-0
(for 115V & 230V usage)

Secondary:

24V-0-24V / 2A
24V-0 / 2A
Magnetic Shield

You could order two versions:

- Standard: EI-core € 64,-

- High End: C-core (same size as 30317) € 112,-

Prices are excl. shipping and VAT
Delivery time around 6 weeks after order.

dvb-projekt

diyAudio Member

Posted in Offer

Views 975 Comments 5 dvb-projekt is offline

Pedja Rogic´s Discrete Diamond Non-Feedback I/V Stage

Posted 17th May 2011 at 04:15 PM by dvb-projekt
Updated 11th July 2011 at 12:49 PM by dvb-projekt (Stock status updated)

For all of you who want an alternative non-tube I/V stage,
Pedja Rogic was so kind and permit me to make a pcb with his circuit.

To get a smaller pcb, i made two connectors for the needed big 10µF caps.

The PCB will have the following data:

Material: FR4 - 2mm
Layers: 2
Board size: 110x95 mm
Surface finish: Immersion Gold
Copper weight: 70µm
Soldermask: Both sides - green
Silkscreen: Legend on top

in Stock

The price will be:

Pedja Rogic DDNF I/V Stage Module: $ 16

Worldwide shipping: $ 9
Europe shipping: $ 5
paypal fee: 3,9%

A donation of $3 USD to diyAudio will be done for every pcb sold.

---

DDNF I/V Stage PSU Module

...

Attached Files

	Pedja Rogic DDNF IV Stage.pdf (71.0 KB, 690 views)
	MLytic 4pin.pdf (13.4 KB, 302 views)
	Pedja Rogic´s DDNF IV Stage BOM.zip (4.9 KB, 206 views)

dvb-projekt

diyAudio Member

Posted in Offer

Views 1420 Comments 5 dvb-projekt is offline

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

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