Non-Oversampling TDA's - Page 2

Pedja · 23rd August 2004, 03:27 AM

Quote:

Originally posted by cmt42001
I agree with your comments that AD844 need a careful implementation for I have built three (…)

Who am I to judge who is serious...??

And what have you found to be important?

supra · 23rd August 2004, 03:31 AM

It's quite easy- I just cut the link to pin 3 of the opamp. There's some spare holes to connect a pair of 220uF Bi Polar Blackgates in Super E style from the output of the DAc (after the 270 ohm I/V resistor) direct to the output socket. Disconnect the wires from the opamp to the output socket, put a 100K resistor across output socket.
That's it. Email me if you need further help.

A tube buffer after the TDA1541 double dac is probably fine , but if your using a tube pre/power amp after that again ,I think you'll find the 844 buffer is much more neutral and ultimately natural.
Tubes are great! but too many is as bad as too much SS.

cmt42001 · 23rd August 2004, 05:03 AM

Pedja,

Quote:

And what have you found to be important?

What is important is what sound come out of it.

Pedja · 23rd August 2004, 06:04 AM

Brilliant!

OK, what do you mean when you say "AD844 need a careful implementation"?

cmt42001 · 23rd August 2004, 06:37 AM

May be this can help:

Quote:

use it the way it must be used or do not use it. At least, be aware of the way you use it.

Pedja · 23rd August 2004, 06:42 AM

Help what?

cmt42001 · 23rd August 2004, 06:50 AM

What is what??
Afterall, it is a matter of taste.

Pedja · 23rd August 2004, 06:58 AM

OK cmt42001,

We will do it easy when it comes to the taste.

The question for you is: after 3 common base stages you made with it, what matters in "AD844 need a careful implementation"? Do you have a slightest idea about it?

cmt42001 · 23rd August 2004, 07:29 AM

Pedja,
Glad that you have cool off. Personal taste is half the fun in DIY..
"use it the way it must be used...... At least, be aware of the way you use it." fits my idea of careful implementation.
BTW, can you design some sort of auto compensation circuit to cater for the frequent adjusment of the 2SK170/trimpot combo?

Bernhard · 23rd August 2004, 09:00 AM

Little calculation:

TDA1541A nonos ( strong even order harmonics )
+ tube output stage ( strong even order harmonics )
+ tube preamp ( strong even order harmonics )
_________________________________________

very musical, transparent & holographic sound

23rd August 2004, 09:00 AM	#20
Bernhard diyAudio Member Join Date: Apr 2002 Location: Munich	Huhu, funny thread ! Little calculation: TDA1541A nonos ( strong even order harmonics ) + tube output stage ( strong even order harmonics ) + tube preamp ( strong even order harmonics ) _________________________________________ very musical, transparent & holographic sound __________________ R2R nonos / analog filter = Diamond Multibit delta sigma / DF = Zirkonia Standard delta sigma / DF = Glass

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Non oversampling cd-94 MK1	D.A.R.R.Y.L.	Digital Source	5	1st December 2004 11:33 PM
TDA5141 oversampling or non-oversampling ?	Bernhard	Digital Source	4	1st September 2004 11:27 AM
Non-Oversampling DAC	lucpes	Digital Source	42	6th July 2004 04:06 AM

New To Site?	Need Help?
Register to Participate Search Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


<a rel='nofollow' href='http://www.diyaudio.com/openx/www/delivery/ck.php?n=aa5cb2e9&cb=288298' target='_blank'><img src='http://www.diyaudio.com/openx/www/delivery/avw.php?zoneid=3&cb=288298&n=aa5cb2e9' border='0' alt='' /></a>	We're saving for a new server - help us to serve you by Donating Today and become a friend with benefits! Ads on/off / Custom Title / 2009 Tshirt / More PMs / Bigger Images / Advanced printing

23rd August 2004, 03:31 AM	#12
supra diyAudio Member Join Date: Jul 2004 Location: Margaret River West Australia	It's quite easy- I just cut the link to pin 3 of the opamp. There's some spare holes to connect a pair of 220uF Bi Polar Blackgates in Super E style from the output of the DAc (after the 270 ohm I/V resistor) direct to the output socket. Disconnect the wires from the opamp to the output socket, put a 100K resistor across output socket. That's it. Email me if you need further help. A tube buffer after the TDA1541 double dac is probably fine , but if your using a tube pre/power amp after that again ,I think you'll find the 844 buffer is much more neutral and ultimately natural. Tubes are great! but too many is as bad as too much SS.

23rd August 2004, 06:04 AM	#14
Pedja diyAudio Member Join Date: Jun 2002 Location: Serbia	Brilliant! OK, what do you mean when you say "AD844 need a careful implementation"?

23rd August 2004, 06:42 AM	#16
Pedja diyAudio Member Join Date: Jun 2002 Location: Serbia	Help what?

23rd August 2004, 06:50 AM	#17
cmt42001 diyAudio Member Join Date: Mar 2004 Location: Kowloon	What is what?? Afterall, it is a matter of taste.

23rd August 2004, 06:58 AM	#18
Pedja diyAudio Member Join Date: Jun 2002 Location: Serbia	OK cmt42001, We will do it easy when it comes to the taste. The question for you is: after 3 common base stages you made with it, what matters in "AD844 need a careful implementation"? Do you have a slightest idea about it?

23rd August 2004, 07:29 AM	#19
cmt42001 diyAudio Member Join Date: Mar 2004 Location: Kowloon	Pedja, Glad that you have cool off. Personal taste is half the fun in DIY.. "use it the way it must be used...... At least, be aware of the way you use it." fits my idea of careful implementation. BTW, can you design some sort of auto compensation circuit to cater for the frequent adjusment of the 2SK170/trimpot combo?

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)