Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

I can't win this noise.
I can't win this noise.
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 28th January 2012, 02:35 AM   #1
jinkuchi is offline jinkuchi  Japan
diyAudio Member
 
Join Date: May 2004
Location: shinjuku
Default I can't win this noise.

LM 3886 typical circuit. plus optional components in datasheet.

some day the noise come from electric motors from AC line.
in 9.30 AM some day about 10 min and it gone.
There are many industries or wood crafting around here.

I try every thing.
not work.

Japanese AC line noise filter
small c input to ground
small c input+ , - of the ic.

event I turn volume to ground it still noise.
volume is ALPS made in Japan.

I attach the noise I record from speaker. up volume 300%.
Attached Files
File Type: zip noiselm3886.zip (495.8 KB, 20 views)
__________________
jinkuchi
  Reply With Quote
Old 28th January 2012, 03:03 AM   #2
djoffe is offline djoffe  United States
diyAudio Member
 
Join Date: Oct 2008
please post your schematic...everyone has a different idea of "typical".
  Reply With Quote
Old 30th January 2012, 04:49 AM   #3
gmphadte is offline gmphadte  India
diyAudio Member
 
Join Date: Jul 2003
Location: Dona paula, Goa
Is your assy inside a metal chassis or open.

Gajanan Phadte
  Reply With Quote
Old 30th January 2012, 07:33 AM   #4
madtecchy is offline madtecchy  England
diyAudio Member
 
Join Date: Dec 2010
Location: wigan
just start listening at 09:40. then no noise to filter.

Ian
  Reply With Quote

Reply


I can't win this noise.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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Ok SY...You Win valveitude Tubes / Valves 59 7th September 2006 05:54 PM
Looking for Clio Win fanta Swap Meet 0 24th August 2003 05:45 PM
Win ME to XP ? ashok Everything Else 25 1st August 2003 10:47 PM


New To Site? Need Help?

All times are GMT. The time now is 02:12 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki