Op amp fault? - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

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 27th April 2012, 10:08 PM   #1
fap is offline fap  Australia
diyAudio Member
Join Date: Sep 2010
Location: North Queensland.
Default Op amp fault?

G'day all, yesterday evening one of my beloved ESP P06 DIY phono stages developed a strange fault (although it may have been there longer, but I never noticed it!

A loud 'whoosing' noise only on the right channel. I immediately suspected a faulty op amp and yes it proved to be that. The first op amp in the circuit (an OPA2134). It worked normally but had become very noisy.

Has anybody ever struck an OPA2134 with that kind of partial fault, or have I just been unlucky? Regards, Felix.
  Reply With Quote
Old 28th April 2012, 12:28 AM   #2
kevinkr is offline kevinkr  United States
diyAudio Moderator
kevinkr's Avatar
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Could be ESD induced damage... I have had this experience with other fet op-amps and have deliberately zapped TL072 (another op-amp with jfet inputs) with a Keytek ESD gun and had them fail with similar symptoms.
"To argue with a person who has renounced the use of reason is like administering medicine to the dead." - Thomas Paine
  Reply With Quote
Old 28th April 2012, 01:35 AM   #3
fap is offline fap  Australia
diyAudio Member
Join Date: Sep 2010
Location: North Queensland.
G'day mate, thanks for that. I had heard of this happening, but it was a first time for me. Regards, Felix.
  Reply With Quote
Old 6th December 2013, 06:43 PM   #4
diyAudio Member
Join Date: Dec 2013
Hi I wonder if you are still on the scene to give me some help to identify the sound fault you had to see if its the same as mine.
I have an audio file that might help, is it the same as your noise?
Would greatly appreciate it.
  Reply With Quote
Old 6th December 2013, 07:48 PM   #5
diyAudio Member
Join Date: Dec 2013
Attached is a zipped audio file of the noise from my digital piano, could you let me know if it sounds the same.
Attached Files
File Type: zip audiofile.zip (334.4 KB, 6 views)
  Reply With Quote


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
Old amp, power out and fault? Riddles Solid State 1 23rd September 2011 10:12 PM
op-amp + op-amp buffer combinations eccdbb Chip Amps 2 22nd July 2011 04:13 AM
What is the fault with this amp? analogadikt Tubes / Valves 3 6th April 2011 02:27 AM
Pre amp fault Addolff Parts 4 6th January 2008 01:55 PM
sorted out amp fault leander Solid State 0 22nd September 2005 06:00 AM

New To Site? Need Help?

All times are GMT. The time now is 08:06 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2