Plz Help i think iv'e just distroyed my amp - diyAudio
Go Back   Home > Forums > Amplifiers > Pass Labs

Pass Labs This forum is dedicated to Pass Labs discussion.

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 20th May 2004, 09:37 PM   #1
Rixsta is offline Rixsta  United Kingdom
diyAudio Member
 
Join Date: Feb 2004
Location: Barrow-In-Furness, Cumbria
Send a message via Skype™ to Rixsta
Angry Plz Help i think iv'e just distroyed my amp

My zen 4 has been running fine until i just turned it on and i get a very load buzzzzzz.
it sounds like 50hz and it slowly fades away when i turn the amp off...

well it was working ok or perfect even, the transformer was a bit warm but thats all. and im running it bias at 1.5 amp

It's a zen 4 penultimate and it effects both channels dam it id only just today got it working and was enjoying the qualty and realising how bad mp3 actualy sounds too..

I do have one theory and that is i might of had a bad rca/phono connector on the input maybe the earth is faulty on it and cause the input transistor to blow..
__________________
www.Rixsta.co.uk Free music recorded by me/DIY pics Currently Selling, amps=Zen V4, Zen-lightenment‎, Jean Hiraga 20w, F5, F5T
  Reply With Quote
Old 20th May 2004, 09:43 PM   #2
diyAudio Member
 
wuffwaff's Avatar
 
Join Date: Aug 2001
Location: Ingolstadt Germany
Rixsta,

do you use a shared power supply for the two channels? If so it sounds like a cap has gone.

William
__________________
een ooievaar is geen konijn want zijn oren zijn te klein!
  Reply With Quote
Old 20th May 2004, 09:45 PM   #3
Rixsta is offline Rixsta  United Kingdom
diyAudio Member
 
Join Date: Feb 2004
Location: Barrow-In-Furness, Cumbria
Send a message via Skype™ to Rixsta
theres two seperate windings on my toroidal transformer i have 1 rectifier on each and one cap on each rectifier

i think thats basicly a shared transformer

if i charge up a new good cap and put it onto the amp alone i will find out right?
__________________
www.Rixsta.co.uk Free music recorded by me/DIY pics Currently Selling, amps=Zen V4, Zen-lightenment‎, Jean Hiraga 20w, F5, F5T
  Reply With Quote
Old 20th May 2004, 09:48 PM   #4
diyAudio Member
 
wuffwaff's Avatar
 
Join Date: Aug 2001
Location: Ingolstadt Germany
but do you use this supply for both channels?

If so check the caps and the wiring to the caps, if you´ve got an scope you should see a large ripple on one of the two caps (or on both)

William
__________________
een ooievaar is geen konijn want zijn oren zijn te klein!
  Reply With Quote
Old 20th May 2004, 09:54 PM   #5
Rixsta is offline Rixsta  United Kingdom
diyAudio Member
 
Join Date: Feb 2004
Location: Barrow-In-Furness, Cumbria
Send a message via Skype™ to Rixsta
Quote:
but do you use this supply for both channels?
Yes

i have no scope but i will replace the cap's or one of them one channel at a time.
the cap's are different so i dont see why they would both go at the same time unlss the transformer killed them or too much power was drawn from the PS
__________________
www.Rixsta.co.uk Free music recorded by me/DIY pics Currently Selling, amps=Zen V4, Zen-lightenment‎, Jean Hiraga 20w, F5, F5T
  Reply With Quote
Old 20th May 2004, 10:04 PM   #6
Rixsta is offline Rixsta  United Kingdom
diyAudio Member
 
Join Date: Feb 2004
Location: Barrow-In-Furness, Cumbria
Send a message via Skype™ to Rixsta
Ok i know im only a ammiture at electronics but i just hocked up a 20v power supply to it and when i touch the ground of the speaker outs it buzzez. as if they were the inputs to the amp
__________________
www.Rixsta.co.uk Free music recorded by me/DIY pics Currently Selling, amps=Zen V4, Zen-lightenment‎, Jean Hiraga 20w, F5, F5T
  Reply With Quote
Old 21st May 2004, 11:30 AM   #7
diyAudio Member
 
Join Date: Dec 2002
Location: Houston
Quote:
Originally posted by Rixsta
Ok i know im only a ammiture at electronics but i just hocked up a 20v power supply to it and when i touch the ground of the speaker outs it buzzez. as if they were the inputs to the amp
Sounds like a grounding issue. Check all your solder joints and pull on wires to verify good connections.
If you used the Passdiy boards, check solder connections. It takes a 40 watt iron to make good connections on some of the ground plane pads.

George
  Reply With Quote
Old 22nd May 2004, 01:49 PM   #8
Rixsta is offline Rixsta  United Kingdom
diyAudio Member
 
Join Date: Feb 2004
Location: Barrow-In-Furness, Cumbria
Send a message via Skype™ to Rixsta
thanks

Iv'e just fond out my amp is ok it's my graphic eq thats gone wrong makinmg a badd hummm

cheers
__________________
www.Rixsta.co.uk Free music recorded by me/DIY pics Currently Selling, amps=Zen V4, Zen-lightenment‎, Jean Hiraga 20w, F5, F5T
  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
I distroyed my preamp: dc on imput wazzup Analogue Source 5 29th November 2004 08:47 PM
Penultimate zen all mosfets distroyed Rixsta Pass Labs 65 21st April 2004 01:57 PM


New To Site? Need Help?

All times are GMT. The time now is 04:18 PM.


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