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Discontinued Modules
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Reference TDA1541A DAC Modules

Posted 14th June 2013 at 10:51 AM by dvb projekt
Updated 27th September 2013 at 01:27 PM by dvb projekt

TDA1541A DAC Module

Click the image to open in full size.
Click the image to open in full size.

- separate TL431 Shunt regulators for each voltage line
- independent voltage rail for the DEM reclock circuit
- I2S attenuator circuit
- shortest possible position for decoupling caps
- separate ground line for decoupling caps
- Ground plane
- 2mm pcb
- Immersion Gold
- green soldermask on both side
- 35µm copper weight
- Board size 125mm x 125mm

in Stock

The price is:

TDA1541A DAC Module: $9

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

Shipping insurance on buyers request!


----------

The Ultra High Speed Buffer Module will be shipped "ready to use",
with three NC7SZ125 chips
...
Attached Files
File Type: pdf Reference TDA1541A DAC V2.3.pdf (559.7 KB, 528 views)
File Type: zip TDA1541A Project-BOM-Final.xls.zip (8.0 KB, 174 views)
File Type: pdf Takamisawa NA-Type.pdf (153.3 KB, 654 views)
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Old

Tube-I-zator V3.0 - Out of production

Posted 5th April 2013 at 03:28 PM by dvb projekt
Updated 16th September 2013 at 05:16 PM by dvb projekt

Tube-I-zator V3.0

Click the image to open in full size.

The evolution brings the following changes:

- Anode PSU with Salas SSHV Shunt Reg. onboard
- External B+ Input for usage with other Anode PSU
- Heater PSU with C-R-C filtering
- Heater PSU with Softstart circuit
- Heater PSU Power LED

Thanks to John (-ecdesigns-) for the following suggestions!

- Grid stoppers to prevent unwanted oscillations
- Bias current injection for TDA1541A usage
- Pull-down resistors to keep the coupling cap output at GND-potential

Still on the Module:

- Heater switch for 6N2P or 12AX7 usage



An example for a balanced use (e.g. Bufalo II), you could see HERE.



The PCB has the following data:

Material: FR4 - 2mm
Layers: 2
Board size: 193x157 mm
Surface
...
Attached Files
File Type: pdf Tube-I-zator V3.0.pdf (30.2 KB, 492 views)
File Type: zip Tube-I-zator V3.0 - BOM.xls.zip (7.6 KB, 203 views)
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Old

The Red Baron DAC Module V4.0 - Out of production

Posted 8th February 2013 at 08:34 AM by dvb projekt
Updated 19th June 2013 at 10:26 AM by dvb projekt

The Red Baron
V4.0



Click the image to open in full size.


The evolution brings the following changes

- Separate I2S-GND route to Digital-GND
- Separate Analog Output GND route
- Separate GND route for active divider decoupling caps to Analog-GND
- Modified active divider decoupling pads for better SMD 1210 caps soldering
- Onboard SOT353 footprint for fastest DEM-Synchronizer IC´s
- Un-interrupted ground plane
- MOSFET Source/Drain failure corrected


Still on the module

- Direct shunt voltage inputs with shortest onboard traces
- I2S In-/Outputs with shortest onboard traces
- I2S Attenuator and DEM Synchronizer
(by -ecdesigns-)
- Onboard Grounded-Gate MOSFET Current Buffer I/V Stage
(-ecdesigns- MK7 version)
- Separate GND-Trace for DEM-Synchroinizer
- Master/Slave
...
Attached Files
File Type: pdf Red Baron V4.0.pdf (593.7 KB, 475 views)
File Type: zip TDA1541A Project - BOM - for The Red Baron V4.zip (9.3 KB, 179 views)
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Rating: 2 votes, 4.00 average.

TDA1541A DAC Module V3.0 - Out of production

Posted 20th August 2011 at 08:32 AM by dvb projekt
Updated 19th June 2013 at 10:27 AM by dvb projekt

The Red Baron

aka TDA1541A DAC V3.0


Click the image to open in full size.


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


Click the image to open in full size.


The PCB has the following data:

Material: FR4 - 2mm
Layers: 2
Board size: 125x73 mm
...
Attached Files
File Type: zip TDA1541A Project - BOM - for The Red Baron.zip (9.0 KB, 796 views)
File Type: pdf The Red Baron DAC.pdf (28.9 KB, 1745 views)
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Old

Transformer for Pedja Rogic´s DDNF I/V Stage

Posted 23rd May 2011 at 10:44 AM by dvb projekt
Updated 14th June 2013 at 09:47 AM 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.


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

Posted 17th May 2011 at 04:15 PM by dvb projekt
Updated 14th June 2013 at 09:46 AM by dvb projekt

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.


Click the image to open in full size.


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

Out of production

Attached Files
File Type: pdf Pedja Rogic DDNF IV Stage.pdf (71.0 KB, 3250 views)
File Type: zip Pedja Rogic´s DDNF IV Stage BOM.zip (4.9 KB, 485 views)
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Old

SSHV-Shunt Module

Posted 7th April 2011 at 01:19 PM by dvb projekt
Updated 17th December 2014 at 01:33 PM by dvb projekt (Stock status updated)

My last thoughts to optimize the Tube-I-zator goes to the B+ High Voltage lines.
To get the maximum flexibility, i have made splitting points in the lines.
The splitting of the anode psu lines brings upgrades possibilities.

You could use e.g. a tube rectifier with C-R-C filter instead of the onboard andoe psu or
switch to a regulated shunt psu, witch in my mind brings the greater sound quality upgrade.

With the experiences from Salas low voltage shunt on my DAC project in mind,
i have made an upgrade module for the Tube-I-zator based on his HV shunt circuit design.

Here it is


Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.


The specifications are:

-
...
Attached Files
File Type: zip Tube-I-zator SSHV-Shunt BOM Final.zip (6.8 KB, 441 views)
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Old

Tube-I-zator V2.0 Output Stage - Out of production

Posted 7th April 2011 at 01:14 PM by dvb projekt
Updated 14th June 2013 at 09:47 AM by dvb projekt

The Tube-I-zator V2.0

Click the image to open in full size.

The evolution brings the following changes:

- Heater Switch without any relays
- Low ESR Heater PSU (e.g. Panasonic FM)
- Star Grounding
- Mounting holes for the HV-Salas Shunt Module
- Compacter design





The PCB has the following data:

Material: FR4 - 2mm
Layers: 2
Board size: 193x157 mm
Surface finish: Immersion Gold
Copper weight: 70µm
Soldermask: Both sides - green
Silkscreen: Legend on top

Out of production
Attached Files
File Type: pdf Tube-I-zator V2.0.pdf (19.4 KB, 1175 views)
File Type: zip Tube-I-zator SSHV-Shunt BOM Final.zip (6.8 KB, 526 views)
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