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Old 23rd November 2006, 01:13 PM   #1
Tyimo is offline Tyimo  Hungary
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Location: Hungary
Default Power DAC for for SEWA 7 Watt ClassA MOSFET amp

Gritings Digital Gurus!

This Project is about build a Power DAC
to match the input of SEWA 7 Watt Class A MOSFET Power Amp.

Would it be possible to design a Power DAC for this SEWA amp?????
I mean a non oversampling DAC that has enough power to direct drive the SEWA. No preamp just a buffered (maybe tube....) DAC with ca.11V RMS output and the SEWA!

Requirements:

+/-20V voltage swing
Able to drive 47K-100K, 250pF
have a variable gain option: between 1-10 (for example) instead of Volume control.
Low noise

Wishlist:

-Uses available parts
-Easy to build
-very nice sound.....

Please help us to make this dream come true!

Tyimo
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Old 23rd November 2006, 02:53 PM   #2
lineup is offline lineup  Sweden
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Thumbs up non oversampling dac - Power DAC

hey!

hope the few good digital guys
that are left after some left this place
can give us some guidance

we need
- a chip that is very easy to use for non-oversampling
- or a link to such a DIY project
- if is current output from DAC we want some great I/V converter
- with the option of variable voltage gain (say 0 to x15) of output from this I/V
- output voltage 15-20 volt peak, 10-15 V RMS
- to be able to drive a output power follower with output ~10-20 Watt into 8/4 Ohm speakers
- this high voltage ouput Power DAC should be able to drive
- a normal line load impedance of like 22-47 kOhm

thanks digital gurus
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lineup
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Old 23rd November 2006, 03:22 PM   #3
Tyimo is offline Tyimo  Hungary
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Join Date: Nov 2002
Location: Hungary
Hi Lineup!

Nice to see here!

For the start:

Quote:
a chip that is very easy to use for non-oversampling
-TDA1543
-TDA1541

Quote:
or a link to such a DIY project
-RJM's DAC of the clones on
http://www.geocities.com/rjm003.geo/...o/diy_dac.html

-Galavotti's ZERO DIY "Kusunoki-style" DAC on
www.geocities.com/agalavotti/zerodac.htm

Greets:

Tyimo
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Old 28th November 2006, 12:34 PM   #4
Tyimo is offline Tyimo  Hungary
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Join Date: Nov 2002
Location: Hungary
Hey Lineup brother!

It seems nobody can answer to us. I am afraid the DAC gurus died out like the dynos or our question was too stupid

Now I reedit my first question to this:

What couod be the max. output voltage of a DAC chip???


Greets:

Tyimo
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Old 28th November 2006, 12:40 PM   #5
Tyimo is offline Tyimo  Hungary
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Join Date: Nov 2002
Location: Hungary
Here is something interesting info!


Tyimo
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File Type: zip sukhov1.zip (94.2 KB, 76 views)
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