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High Voltage schematic for the Reference DAC PSU

Posted 20th April 2011 at 09:21 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-Shunts,
one for each channel on the Tube-I-zator.



Click the image to open in full size.
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The PSU case

Posted 17th April 2011 at 12:45 PM by dvb projekt
Updated 30th November 2016 at 09:58 AM by dvb projekt

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

Click the image to open in full size.

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

...now here is the answer

Click the image to open in full size.

Ive got a perfect aluminum transformer housing and now it sits perfect without an air gap.


Now its time to assemble the parts.


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SSHV-Shunt Module

Posted 7th April 2011 at 02:19 PM by dvb projekt
Updated 30th November 2016 at 10:31 AM 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:

- 2mm
...
Attached Files
File Type: zip Tube-I-zator SSHV-Shunt BOM Final.zip (6.8 KB, 499 views)
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Tube-I-zator V2.0 Output Stage - Out of production

Posted 7th April 2011 at 02:14 PM by dvb projekt
Updated 30th November 2016 at 10:33 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: 70m
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, 1656 views)
File Type: zip Tube-I-zator SSHV-Shunt BOM Final.zip (6.8 KB, 871 views)
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Rating: 2 votes, 5.00 average.

Reference TDA1541A DAC Power Modules

Posted 7th April 2011 at 02:01 PM by dvb projekt
Updated 21st November 2016 at 10:08 AM by dvb projekt (Stock status updated)

+/- Power Supply Module

Click the image to open in full size.


- up to 15 caps per rail (16mm to 18mm diameter)
- place for decoupling foil cap in each rail
- place for bleeder resistor
- 105m copper weight
- 2mm pcb
- Immersion Gold
- green soldermask on both side
- Board size 195mm x 120mm

Sold out



Shunt regulator modules
circuit design by Salas



Click the image to open in full size.

- Shunt regulator module for TDA1541A (+5V, -5V, -15V)
- separate Shunt regulator module for additional parts (+5V)
- 70m copper weight
- 2mm pcb
- Immersion Gold
- green soldermask on both side
- Board size 147mm x 115mm (46mm x 115mm; single +5V)

TDA1541A shunt module 5pcs. left in stock
...
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