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Old 10th January 2013, 10:15 PM   #491
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Quote:
Originally Posted by Joshua_G View Post
Can you please post a schematic of it?
You will find schematics in the threads posted by regal some days ago.

For more info, john broskie has analyzed the gomes stage on tubecad.com as well.
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Old 10th January 2013, 10:58 PM   #492
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Quote:
Originally Posted by studiostevus View Post
You will find schematics in the threads posted by regal some days ago.

For more info, john broskie has analyzed the gomes stage on tubecad.com as well.
Few schematics were referenced. Can you please link to the schematic you used?
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Old 10th January 2013, 11:50 PM   #493
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Schematics as in post #13, with Rk as in the last posts of the thread...

Would suggest strongly to use other tubes as 6072 is unobtanium And very expensive....! You can make this stage with many tubes, including some of the russian ones. Of course, you need to vary the operating point a bit.
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Old 11th January 2013, 03:10 PM   #494
regal is offline regal  United States
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Quote:
Originally Posted by studiostevus View Post
I am using the Gomes stage in my dac, and it sounds excellent. One thing about the 2ma offset: i am using the negative offset as fixed bias to be able to bias the tubes very near to their 0v line (while surely maintaining a negative bias). So not in all cases it's useful to compensate the offset.
The voltage compliance spec for the tda 1541A is 25mv, I understand what you are doing using the offset for negative bias but Oleg had a great tests showing that for passive I/V there was significantly less distortion with a tube stage by injecting the 2mA to the top of the I/V resistor. I wish I could find Oleg's webpage 'cause it was full of some real measurements about passive I/V + tube TDA1541 design. His tube stage was measuring better than most SS I/V stages.
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Old 14th January 2013, 10:54 AM   #495
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@studiostevus
Sorry for OT, I want to send you a pm but your box is full.
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Old 15th January 2013, 06:03 PM   #496
Aronier is offline Aronier  Germany
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Hello,

any good TDA1541A DAC kit`s found at this time?

regards
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Old 18th January 2013, 06:55 PM   #497
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Hello,
what do you think about this kit - TDA1541 Decoder OP/S8MA CS8412+SAA7220+TDA1541+OP LPF
TDA1541 Decoder Op S8MA CS8412 SAA7220 TDA1541 Op LPF DAC DIY Kit | eBay
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Old 30th January 2013, 10:07 AM   #498
Aronier is offline Aronier  Germany
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I`m looking for a good dual TDA1541A diy DAC.

Any suggestions?

Thank you
Aronier
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Old 30th January 2013, 11:17 AM   #499
erin is offline erin  Australia
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Quote:
Originally Posted by Aronier View Post
I`m looking for a good dual TDA1541A diy DAC.

Any suggestions?
Yes. there are no kits available. You will have to build your own.
You will probably need the board in this thread to make your life easier:

Drive NOS AD1865/62,PCM1704/02/63,TDA1541 from FIFO: Universal I2S-PCM driver board
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Old 1st February 2013, 09:52 AM   #500
Aronier is offline Aronier  Germany
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Looks like so erin, thank`s.

I thought so i take the Amanero USB to I2S USB to I2S 384Khz - DSD Converter

And the "Amanero Isolator/Reclocker" Amanero Isolator/Reclocker GB

Should i take the board too? Drive NOS AD1865/62,PCM1704/02/63,TDA1541 from FIFO: Universal I2S-PCM driver board
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