Simple I/V for TDA1541 - Page 10 - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 6th April 2010, 04:19 PM   #91
diyAudio Member
 
Join Date: Apr 2008
i've built the circuit, and when the volume on the cd is low, it sounds fine. but as soon as samples come above a certain level, they transform to a harsh 'click' or 'pop'. all initial adjustments have been done, but even when seriously offset (try and error-method), the behaviour doesn't change. both channels have the same problem

is hfe very important?
  Reply With Quote
Old 14th April 2010, 05:05 PM   #92
diyAudio Member
 
robertor's Avatar
 
Join Date: Nov 2007
Send a message via Skype™ to robertor
hi everybody.

i just bought the last lampucera DAC:

2010 NEW VERSION 24bit/192khz DAC Kit su eBay.it CD Players Recorders, Home Audio, Electronics

who use the opamp, in this case the NE5532, as the I/V conversion stage.

the schematic appear on the first post of this 3D can be used also to replace this type of opamps?

the third opamp you see is for the output and will be replaced by opa627 or audio-gd MOON.

thanks everyone.

rob
__________________
rob
  Reply With Quote
Old 17th April 2010, 12:10 AM   #93
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
You need DUAL OpAmps to replace those - 2xOPA627 need to be mounted on a brown-dog adaptor.
Personally I didn't want to complicate thinks. I liked the best the sound of LM4562.
Attached Images
File Type: jpg OpAmp_2.JPG (73.5 KB, 1029 views)
  Reply With Quote
Old 19th April 2010, 10:34 AM   #94
diyAudio Member
 
robertor's Avatar
 
Join Date: Nov 2007
Send a message via Skype™ to robertor
ok, then nothing "discrete stage" replacing the opamp.
that will be a big problem.
will come back the opamp rolling.
__________________
rob
  Reply With Quote
Old 22nd April 2010, 07:58 PM   #95
diyAudio Member
 
Join Date: Mar 2008
Quote:
Originally Posted by SoNic_real_one View Post
You need DUAL OpAmps to replace those - 2xOPA627 need to be mounted on a brown-dog adaptor.
Personally I didn't want to complicate thinks. I liked the best the sound of LM4562.
fyi, we were just discussing this DAC's opamps a few topics up on the forum:

New Small DIY Gigawork Dac? - diyAudio

I'm burning-in a Burson module in the output now, the other guy recommends LM4562's in the I/V. Those OPA Sun, Moon and Earth modules pique my interest as well...
  Reply With Quote
Old 4th May 2010, 07:39 AM   #96
regal is offline regal  United States
diyAudio Member
 
Join Date: Jan 2004
Location: MD
Quote:
Originally Posted by robertor View Post
ok, then nothing "discrete stage" replacing the opamp.
that will be a big problem.
will come back the opamp rolling.
See the Pass D1 for Sabre thread, thats the only discrete I/V stage I have seen that handles differential output DAC's.
  Reply With Quote
Old 22nd November 2010, 03:18 PM   #97
diyAudio Member
 
Join Date: Feb 2010
hi, i want to know what part to choose for the CCS i-dac?
  Reply With Quote
Old 2nd November 2012, 02:58 AM   #98
diyAudio Member
 
Join Date: Jun 2003
Default how to increase the output level

Quote:
Originally Posted by powerflux View Post
i've built the circuit, and when the volume on the cd is low, it sounds fine. but as soon as samples come above a certain level, they transform to a harsh 'click' or 'pop'. all initial adjustments have been done, but even when seriously offset (try and error-method), the behaviour doesn't change. both channels have the same problem

is hfe very important?
Hi powerflux, and anyone who can help

I built the original circuit from rbroer too, but I didn't encounter the problem of click and pop, but I did find out that the output level is low., only 1.1V or so.
Does any one can help me to increase the output level to 2.5~ 3 V??
Any resistors or setup to increase the gain??
I know this is an old thread but since I built so I would like to know how to do further, hope someone can help!!
THX
  Reply With Quote
Old 13th October 2013, 08:32 PM   #99
diyAudio Member
 
Join Date: Oct 2004
Hi Tubee,

I've built a couple of these recently, and I get the same low output.
As a stopgap, I'm using a simple opamp circuit afterwards, with a gain of about 10.
Seems to bring it up to a more usable level (not that I'm actually measuring anything).
Unless I'm doing anything wrong (I'm using rbroer's first Jocko's IV stage, but doubled the output resistance), I shall begin on a discrete gain stage and buffer.

Phil
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Less simple I/V for TDA1541 rbroer Digital Line Level 59 5th December 2007 05:56 AM
Simple, SIMPLE Digital volume control -_nando-_ Digital Source 5 21st December 2006 01:20 PM
Simple answer required for a simple question... rabbitz Multi-Way 4 31st August 2003 10:05 AM


New To Site? Need Help?

All times are GMT. The time now is 02:42 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2