|4th December 2009, 01:09 PM||#1|
Tube-I-zator Professional PCB
Hi to all,
Because of the big success of the I/V SRPP Tube Stage in my finished 4x TDA1541A DAC,
i am planning a PCB Group Buy for those who want to have a optical and technical perfect solution (minimum pre-order 20 PCB´s).
This PCB is for "I-OUT" DAC´s with unbalanced output.
If you want to use it with a "V-OUT" DAC, you must insert a capacitor between the DAC and the PCB.
I have added my Heater-Switch Circuit to the PCB.
Now everyone is able to change between the Russian (6N1P, 6N2P ect.) and Western (12AX7, ECC83 ect.) pinout, without soldering.
The Anode and Heater PSU is included.
There will be the possibility to use an external Anode-PSU, e.g. for upgrading with a Tube rectifier.
Furthermore i made the Audio-Lines extra wide (1,5mm) and choose 70µm copper to get minimal loss.
It will be a 2-Layer Design to seaprate the Audio-Lines (Bottom Layer) from the Electrical-Lines (Top-Layer).
The new Tube-I-zator V3.1
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
New version 3
You will find the BOM in my blog HERE!
For orders please send me a PM or a mail to diyaudiopcb (at) gmx.com
Best regards to the community
Last edited by dvb projekt; 23rd July 2015 at 08:59 AM. Reason: Tube-I-zator V3.1 information added to 1st post
|6th December 2009, 03:17 PM||#4|
Join Date: Nov 2005
Location: McKinney, TX
|6th December 2009, 03:22 PM||#5|
|6th December 2009, 04:00 PM||#8|
If i should give a recommendation:
Rectifier Diodes: Fairchild Stelth ISL9R460PF2 (Mouser Part-No: 512-ISL9R460PF2)
Resistors: Texas Components TX2575 (Texas Components - Precision Resistor & Microelectronics)
Tubes: Russian 6N2P-ER or the brand new E813CC from TechTube (www.techtubevalves.com)
If you will have additional questions, feel free to send a PM.
I will try my best to share my experiences.
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