Bypassing the LM6171 - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 14th March 2005, 09:14 PM   #1
diyAudio Member
 
Join Date: Aug 2004
Location: Calgary, Canada
Default Bypassing the LM6171

Just looking for some user experience on bypassing the power pins on the LM6171

I believe the CarlosFM method is 22-100uF electrolytic with 0.1uF ceramic as close as possible (which I've used happily with other opamps - thanks Carlos!). Datasheet shows a configuration with a 2.2uF tantalum with 0.01uF for the LM6171.

What has worked well for you with this chip?
  Reply With Quote
Old 14th March 2005, 09:25 PM   #2
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
4.7 BG N without any other aditional bypasses.
__________________
www.audiosector.com
Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it. - JC
  Reply With Quote
Old 14th March 2005, 10:27 PM   #3
mikelm is offline mikelm  England
diyAudio Member
 
Join Date: May 2003
Location: England
Send a message via Yahoo to mikelm
1uF low inductance film like cap "ERO" MKT 1822 soldered onto the pins also works and sounds good. This arrangement and a battery works well with no further aditions needed.

best avoid using sockets - they could well cause oscillation.

I did it dead bug style.

mike
  Reply With Quote
Old 14th March 2005, 11:23 PM   #4
Banned
 
Join Date: Mar 2003
Location: Lisbon, Portugal
Default Re: Bypassing the LM6171

Quote:
Originally posted by Fat Dave
Just looking for some user experience on bypassing the power pins on the LM6171

I believe the CarlosFM method is 22-100uF electrolytic with 0.1uF ceramic as close as possible (which I've used happily with other opamps - thanks Carlos!).
That and also a 100~330nf directly across V+ and V- pins works wonders.
No problem with sockets and the LM6171 if you use the small ML ceramics right on the socket's pins to ground.
And btw no need for ultra-fancy caps to have excellent results.
  Reply With Quote
Old 15th March 2005, 04:09 PM   #5
diyAudio Member
 
Join Date: Aug 2004
Location: Calgary, Canada
Thanks all! Good to know it's not hypersensitive - you just need to treat it properly.

I'll probably start with the method I know, and experiment from there.

I was going to go without socket (which I don't like to do, but wanted to avoid the extra capacitance). Maybe I'll give it a try with some good machined sockets first, keep the caps as tight as possible, and see if I can keep it out of oscillation.

And I definitely won't forget the 100-330nF from V+ to V-
  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
LM6171 input stage design capslock Solid State 18 10th March 2014 08:53 PM
Headphone Amplifier used LM6171 op-amp franky2005 Vendor's Bazaar 1 10th March 2010 11:26 PM
Bypassing B+ in PP amp oshifis Tubes / Valves 6 5th May 2008 08:28 PM
Wtd : Lm6171 poynton Swap Meet 0 6th May 2006 03:39 PM
what's the output impedance of a LM6171? deskmate88 Digital Source 2 5th January 2003 03:38 AM


New To Site? Need Help?

All times are GMT. The time now is 10:34 PM.


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