n00b PA problem question - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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
Thread Tools Search this Thread
Old 9th October 2007, 07:27 PM   #1
diyAudio Member
Join Date: Oct 2007
Default n00b PA problem question

I apologize in advance for being ignorant about these things, but i have a lantek (citronic) PPX 900 and after years of working fine it's having trouble that i can't explain properly to technicians.

when first powered on, the amp works fine. but after a few minutes it starts making sounds (through the speakers) that almost sound like wind blowing on a microphone. sometimes, when these sounds increase in intensity, the sound cuts out and distorts for as long as a minute. i've tried it on different speakers with the same result.

can someone tell me what the likely issue is?
  Reply With Quote
Old 9th October 2007, 07:52 PM   #2
Netlist is offline Netlist  Belgium
diyAudio Moderator Emeritus
Netlist's Avatar
Join Date: Jan 2003
I happen to have a PPX1200 on the bench these days and must say they are well build.
Mine has a different problem however.
As a rule of thumb I would check for bad solderings and tighten the TO3 cans as well as the screws of the big power supply capacitors. Check if all op-amps are well seated, too.

  Reply With Quote
Old 10th October 2007, 03:33 PM   #3
diyAudio Member
Join Date: Oct 2007
thanks for the help!

also, if anybody has schematics for the ppx 900, i could really use them...
  Reply With Quote
Old 16th December 2008, 02:56 PM   #4
diyAudio Member
Join Date: Nov 2006
did you get the schematics you required? Sure I have them somewhere if you need them. Regards
  Reply With Quote
Old 16th December 2008, 04:50 PM   #5
diyAudio Moderator
Cal Weldon's Avatar
Join Date: Jan 2004
Location: Near Vancouver
Hello William, as of today it's 424 days since the original poster was last here.
planet10 needs your help:
Let's help Ruth and Dave
  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
n00b problem! Different impedance subwoofer and amp?? will it work?? NeMeSiS_singh Subwoofers 3 4th June 2006 07:58 AM
Yet another n00b matjolic Introductions 2 27th March 2006 02:11 PM
N00B Question c4sper Car Audio 7 20th October 2005 11:24 PM
Stupid n00b RCA question GhettoSQ Car Audio 20 20th September 2005 10:59 PM

New To Site? Need Help?

All times are GMT. The time now is 07:57 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