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

Amp pick up interference
Amp pick up interference
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 13th October 2018, 07:15 PM   #11
tomchr is offline tomchr  Canada
diyAudio Member
tomchr's Avatar
Join Date: Feb 2009
Location: Calgary
Originally Posted by Hicoco View Post
Click the image to open in full size.49 views but nobody answer.....!!!!!!
May be no one have been this trouble before!!!!!! or this thread does not have any interest...thanks anyway for the click on the link
Could also be that your question is a bit vague to start. Or that the first 49 viewers weren't able or available to help.

As others have asked: What kind of interference are we talking about? How's it getting into your circuit? Do you know for sure that the interference is getting in through the cabling?

If the interference does get in through the cabling, an RC or LC filter at the input often helps. You'll want a cutoff frequency of 200 kHz or higher to prevent any impact within the audio band and you want as much attenuation at RF as you can get.
The common 100 Ω + 100 pF RC filter has a cutoff of 15 MHz, which is generally not enough to provide meaningful attenuation of interference sources. Something like 100 uH + 100 pF would probably work. Depending on the ESR of the two components (mainly the inductor) you might have to add a little series resistance to tame the resonant peak of the circuit.

If, on the other hand, your RF interference is radiated into the circuit, shielding is your friend.

Hope this helps.

MOD686: Up to 240W/8Ω, <0.00025% THD. MOD86: 40W/8Ω, 0.000054% THD. HP-1: 3W/20Ω, -130dBc THD, 128dB DNR.
Neurochrome : : Audio - www.neurochrome.com - Engineering : : Done : : Right
  Reply With Quote
Old 13th October 2018, 07:57 PM   #12
Hicoco is offline Hicoco  France
diyAudio Member
Join Date: Feb 2018
Location: Provence
Originally Posted by MAAC0 View Post

First of all .. What kind of Interference are we talking about ??
PSU Hum, Radio, TV, Cellphone, Buzz ??
Cellphone cable, i followed FauxFrench recommendations and no more interferences...Thank to all, helped a lot
  Reply With Quote


Amp pick up interferenceHide 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
Interference anco111 Multi-Way 11 12th March 2018 08:59 AM
Really bad interference... how to fix? dxg Everything Else 11 14th November 2005 01:48 PM
FM interference with AR sub mashaffer Subwoofers 0 21st July 2005 12:31 PM
Interference Prune Everything Else 1 22nd September 2003 04:37 PM

New To Site? Need Help?

All times are GMT. The time now is 01:56 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio