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

LME49810/11/30, LM3886 hum issues & grounding
LME49810/11/30, LM3886 hum issues & grounding
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
Thread Tools Search this Thread
Old 22nd February 2010, 10:18 PM   #11
tomchr is offline tomchr  Canada
diyAudio Member
tomchr's Avatar
Join Date: Feb 2009
Location: Calgary
I got the hum issues sorted out. The 60 Hz I was seeing was due to EMI pick-up. When I shielded the amp in grounded aluminum foil, the last bit of 60 Hz went away.

Another potential source of 60 Hz hum is a defective rectifier.

120 Hz on the other hand is always ripple. Of course, those in countries where 50 Hz mains are used, substitute 50/100 Hz for 60/120 Hz above.

  Reply With Quote


LME49810/11/30, LM3886 hum issues & groundingHide 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
Grounding hum on lm3886 kit encode Chip Amps 7 5th May 2008 12:36 AM
Grounding Issues Bonce Chip Amps 18 9th June 2006 05:00 PM
Grounding issues miguel2 Chip Amps 5 24th May 2004 06:55 PM
Grounding Issues PaulHilgeman Parts 5 26th June 2003 09:36 AM

New To Site? Need Help?

All times are GMT. The time now is 03:15 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