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First Watt F5 for sale

Posted 2nd February 2014 at 04:26 PM by dvb projekt
Updated 3rd February 2014 at 02:03 PM by dvb projekt (Photo added)

For Sale


I am selling my handmade

First Watt F5

Stereo Amplifier
for

1.490,- EURO


Click the image to open in full size.

The price includes worldwide insured shipping.


All photos of the building you could see

HERE and HERE


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Old

The new Tube-I-zator V3.1

Posted 16th September 2013 at 05:28 PM by dvb projekt
Updated 11th July 2014 at 03:21 PM by dvb projekt (Stock status update)

The new Tube-I-zator V3.1

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

- Design failures corrected

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
...
Attached Files
File Type: zip Tube-I-zator V3.1 - BOM.xls.zip (7.6 KB, 212 views)
File Type: pdf Tube-I-zator V3.1.pdf (835.7 KB, 443 views)
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Old

Digital input section completed!

Posted 12th August 2013 at 06:56 AM by dvb projekt

Now the digital input section is completed!


Click the image to open in full size.


Wave I/O for USB input --> SPDIF/AES input board --> FIFO --> Isolator board -->
Dual Clock board with Crystek CCHD-957 clocks (powerd exclusive from a A123 Systems LiFePo4 cell) -->
Ians I2S to PCM V2.0 Module --> Red Baron



Because i use two Red Barons parallel, i added two additional U-FL connectors for DR and DL.


Click the image to open in full size.


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Old

High resolution pictures of my projects

Posted 19th June 2013 at 10:54 AM by dvb projekt

From today you will find high resolution pictures

of all my projects at my

flickr

Webside




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Old

The new Red Baron DAC Module V5.0

Posted 19th June 2013 at 10:30 AM by dvb projekt
Updated 11th July 2014 at 03:22 PM by dvb projekt (Stock status updated)

The new Red Baron
V5.0


Click the image to open in full size.


The evolution brings the following changes

- Jumper for I2S / simultaneous mode
- latest 3.3V attenuator for I2S & simultaneous mode (by -ecdesigns-)
- free running DEM oscillator (by -ecdesigns-)
- additional U.FL pads for I2S & simultaneous mode
- Separate U.FL-GND route to Digital-GND


Still on the module

- 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
- Un-interrupted ground plane
- Direct shunt voltage inputs with shortest onboard traces
- I2S In-/Outputs with shortest onboard traces
- Onboard Grounded-Gate MOSFET Current Buffer I/V Stage
(-ecdesigns-
...
Attached Files
File Type: pdf Red Baron V5.0.pdf (29.7 KB, 687 views)
File Type: zip TDA1541A Project - BOM - for The Red Baron V5.xls.zip (9.2 KB, 396 views)
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Old

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
- 35m 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, 364 views)
File Type: zip TDA1541A Project-BOM-Final.xls.zip (8.0 KB, 143 views)
File Type: pdf Takamisawa NA-Type.pdf (153.3 KB, 414 views)
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Old

Ultra high-end amplifier for Stax Electrostatic Headphones

Posted 11th June 2013 at 06:15 PM by dvb projekt

Because my Stax SR-404 Limited is now one year in his box without using...


Click the image to open in full size.

...i start a new project, based on the fabulous circuit from Andreas Rauenbuehler on high-amp.de




The Transistoramp V4.0

Click the image to open in full size.

My pcbs are ready and now i am collecting the parts.

A set of wonderful teflon Stax Pro and Normal jacks, ive got from a group buy on Head Case.

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

So stay tuned...

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Old

Tube-I-zator Output Cap Upgrade

Posted 3rd May 2013 at 03:23 PM by dvb projekt
Updated 15th May 2013 at 07:56 AM by dvb projekt (Sound review added)

My last dream come true!

The output cap upgrade to the holy grail...

Click the image to open in full size.

DUELUNDs CAST PIO Copper Cap!






Therefore the Tube-I-zator must go to the 2nd floor

Click the image to open in full size.

Click the image to open in full size.


Sound review


Now after ~150 hrs. burn in time, i will share my impressions with these outstanding caps.

I had a dj vu after changing from my previous Mundorf Suprem silver/gold/oil caps to the Duelund CAST PIO Copper.
The same difference as in my 300B mono blocks.

This openness, clarity, three-dimensionality with so many more subtleties and micro informations, absolute breathtaking.
Only the Duelund CAST has the possibility to reproduce this 3D soundstage
...
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Old

Secure source for A123 Systems LiFePo4 cells

Posted 16th April 2013 at 04:53 PM by dvb projekt
Updated 25th May 2013 at 05:15 AM by dvb projekt (2nd source added)

All members who want to use LiFePo4 cells from the leading company A123 Systems
and want a secure source to get no fakes,
could order them at Lipopower Ltd. in Germany.

The original cells are from the German A123 Systems distributors Reva or BMZ.

You could order them with or without solder taps.

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


Also a Ri selection is possible.

International shipping and paypal payment is no problem!





P.S.: If you have any questions, send an e-mail to Mr. Karl-Heinz Hofmann with regards from me!

------------------------------------------------------------------------------------------------------



Ive got an email from A123 Systems with a 2nd source


Quote:
Dear Oliver,

Based
...
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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, 425 views)
File Type: zip Tube-I-zator V3.0 - BOM.xls.zip (7.6 KB, 178 views)
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