|25th March 2013, 08:28 AM||#781|
for the corner frequency between 300-400 kHz you have to calculate the capacitor value for one chip (56R, 8,2pF). Then place this value on each chip for each channel.
Same for the I/V resistor, simply calculate I/V resistor value for one DAC chip (=56R) and place two of these resistors in parallel (=28R).
In short, total capacitance is doubled, total I/V resistor value is halved, turnover frequency remains unchanged.
When using two Red Baron parallel, you need 4x 8,2nF caps and a R I/V of 28R.
|26th March 2013, 05:22 PM||#782|
Well my friends it is time again to say thanks to all of you, who like and ordered my pcb´s.
Because i am no developer of electronic circuits but have the knowledge to design pcb´s,
i wanted to give something back to the community.
Since i started with my 1st pcb, the Optical-Volume-Control on 15th October 2009,
a small donation from every sold pcb goes to diyaudio.com
Today i am proud to say that your cumulated donation achieve
Keep on having fun with my pcb´s and best regards
Last edited by dvb projekt; 26th March 2013 at 05:27 PM.
|1st April 2013, 12:46 PM||#783|
Here you could order my ready build Tube-I-zator test module
(excl. Tubes, Rk & R I/V)
- Nichicon KX Series caps (HV-PSU)
- Panasonic FM Series caps (Heater PSU)
- Mundorf MCap EVO aluminium/oil 2.2µF output caps
- Fairchild ISL9R460PF2 Stealth rectifier diodes
for the special price of
Worldwide shipping and paypal fee
If you are interested, please send me a PM.
Last edited by dvb projekt; 1st April 2013 at 12:57 PM.
|5th April 2013, 03:29 PM||#784|
The new Tube-I-zator V3.0
The new Tube-I-zator V3.0
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
Board size: 193x157 mm
Surface finish: Immersion Gold
Copper weight: 70µm
Soldermask: Both sides - green
Silkscreen: Legend on top
The price will be as followed:
Professional 2-Layer PCB: $30
Worldwide shipping: $ 9
Europe shipping: $ 5
paypal fee: 3,9%
Shipping insurance on buyers request!
A donation of $3 USD to diyAudio will be done for every pcb sold.
A 2nd small failure in my design program needs to expand one of every heatsink mounting holes a bit (1mm).
These two small design failures will be corrected in one of the next batches.
Thank´s in advance for your understanding!
You will find the BOM and Schematic in my blog.
|6th April 2013, 09:47 AM||#789|
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