Go Back   Home > Forums > >

Solid State Talk all about solid state amplification.

a very very weird problem
a very very weird 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
Old 20th March 2016, 06:03 AM   #1
Albrerta is offline Albrerta  Canada
diyAudio Member
 
Join Date: Jun 2007
Default a very very weird problem (please move this to Class D, thanks)

The problem is one channel output lower than another, I know it's something with the preamp, because I just added a LDR attenuator on it.

I tested with another preamp, everything was fine, switching speaker cable from output of power amp, then the weak channel also switched, so safe to say it's not power amp

Now no matter how I switch interconnect cables, the input on power amp, the output on preamp, and the input on preamp, the weak channel always on the same side. It just doesn't make sense, for any issue with the preamp, I would expect the strong/weak channel swapping when I switch the interconnect cable, but why it didn't?

Last edited by Albrerta; 21st March 2016 at 08:47 PM.
  Reply With Quote
Old 20th March 2016, 06:55 AM   #2
analog_sa is offline analog_sa  Europe
diyAudio Member
 
analog_sa's Avatar
 
Join Date: Aug 2002
Location: Cascais
a very very weird problem
A test tone and a voltmeter will discard all weirdness bar the one in your ears
  Reply With Quote
Old 20th March 2016, 08:52 AM   #3
Jay is offline Jay  Indonesia
Banned
 
Join Date: Feb 2003
Location: Jakarta
Quote:
Originally Posted by Albrerta View Post
I tested with another preamp, everything was fine,
Full stop? Meaning: no weak channel with another preamp?

Quote:
Originally Posted by Albrerta View Post
switching speaker cable from output of power amp, then the weak channel also switched, so safe to say it's not power amp
You mean: it is not the speaker? (Which part is the speaker test?)

Strange indeed. Have you got enough sleep lately?
  Reply With Quote
Old 20th March 2016, 09:44 AM   #4
JonSnell Electronic is offline JonSnell Electronic  United Kingdom
diyAudio Member
 
JonSnell Electronic's Avatar
 
Join Date: Dec 2012
Location: The Jurassic Coast, England. GB
I think you have answered your own question; "I know it's something with the preamp, because I just added a LDR attenuator on it".
I would remove it or at least balance the light sources.
Swapping the speakers over and the problem stays the same side? If so, the speaker is at fault.
__________________
Support for Fender, Marshall and all Valve Equipment; Audio Innovations, Audiorama FU29, Quad and Leak. www.jonsnell.co.uk
  Reply With Quote
Old 20th March 2016, 09:56 AM   #5
epicyclic is offline epicyclic  United Kingdom
diyAudio Member
 
Join Date: Jan 2012
Deleted previous message....my bad.
  Reply to this post

Reply


a very very weird problemHide this!Advertise here!
Thread Tools

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
Weird loudspeaker problem Caleb Chia Multi-Way 3 10th September 2010 10:43 AM
weird 1875 problem jarcher12 Chip Amps 7 22nd July 2009 03:05 PM
Weird EH12AY7 Problem Trout Tubes / Valves 7 26th February 2009 01:36 PM
weird problem sberube Solid State 15 22nd October 2008 06:27 PM
Weird Humming problem diegot Chip Amps 18 2nd November 2006 09:42 PM


New To Site? Need Help?

All times are GMT. The time now is 01:51 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki