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

Class D Switching Power Amplifiers and Power D/A conversion

Bad Trimmer or Bigger Problem?
Bad Trimmer or Bigger Problem?
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 9th July 2008, 02:15 PM   #1
daggerlee is offline daggerlee  United States
diyAudio Member
 
Join Date: May 2007
Default Bad Trimmer or Bigger Problem?

Modded a Trends Audio T-Amp yesterday; changed tank caps, input caps, RCAs and speaker outs. Nothing too wild.

Turned it on and measured DC offset at the output. On the Left output it was a little high (4 mV) so I tried adjusting it using the trimmer. When I did, the offset fluctuated wildly, going as high as 70 mV. When I got it to around +10 mV, I noticed that the slightest touch would send it fluctuating anywhere between +15 mV and -15 mV.

Is this a bad trimmer, or a symptom of a larger problem? Should I start by switching out the trimmer, or does anybody have suggestions for another area to start troubleshooting? Thanks very much.
  Reply With Quote

Reply


Bad Trimmer or Bigger Problem?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
Trimmer pot source? RobWilJr Parts 7 31st May 2009 01:13 AM
Recommend a Trimmer Pot kptseng Solid State 8 21st March 2008 12:32 PM
without trimmer or bias. norstar815 Solid State 3 22nd May 2007 03:59 AM
digital potentiometer/trimmer ? ZERS Parts 3 31st January 2005 04:37 PM
Characters getting bigger and bigger Elso Kwak Everything Else 11 31st May 2003 11:43 PM


New To Site? Need Help?

All times are GMT. The time now is 04:14 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki