Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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 1st February 2013, 11:40 AM   #1
diyAudio Member
 
Join Date: Apr 2007
Default Noise pattern

HI has anyone recoginze the noise pattern shown in the attached image? Is 100 Hz (arount 10 mV in output) as shown in oscilloscope and is superimposed in practical any voltage trace of my amp. In power suply and in input - output. Because i control the amp using micro, is there a possibility that this pattern comes from a faulty misbehaving crystal-resonator?
Attached Images
File Type: jpg noise.jpg (7.6 KB, 39 views)
  Reply With Quote
Old 1st February 2013, 12:12 PM   #2
DUG is offline DUG  Canada
diyAudio Member
 
Join Date: Jan 2003
Location: mississauga ontario canada
As soon as I saw the 100Hz reference I said to myself...This person must be living in an area that uses 50Hz as a power frequency.


If this appears everywhere then the possibility exists that there is a ground loop with the hookup for your measurement or that the "ground" connection for your scope probe is not connected to a good ground reference.

"faulty misbehaving crystal-resonator"...probably not.

One has to be careful in setting up a noise measurement...the setup itself can show signals that are not really there.

__________________
Doug We are all learning...we can all help
"You can't stop the signal, Mal. Everything goes somewhere..."
  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
Magneplanar magnet pattern? Few Planars & Exotics 9 24th February 2013 10:39 PM
which if any FR have the same bolt pattern as FE206EN? freddi Full Range 2 15th October 2010 05:53 PM
Pattern around tweeter... Godzilla Full Range 6 9th December 2008 12:17 PM
PCB pattern for 100W Amp r_s_dhar Solid State 49 20th August 2004 12:05 PM


New To Site? Need Help?

All times are GMT. The time now is 12:58 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