No sound from reboxed t-amp - diyAudio
Go Back   Home > Forums > Amplifiers > Class D

Class D Switching Power Amplifiers and Power D/A conversion

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 17th April 2009, 12:18 PM   #1
diyAudio Member
 
Join Date: Jun 2006
Default No sound from reboxed t-amp

Hello all,

I have reboxed my original t-amp according to the instructions on the tnt website. No new caps or anything like that, just new terminals.

I could not get a 50k pot so using 100k from maplin. Also still using 3.5mm input on board for phono input.

However, I am not getting any sound from either channel. Just some rapid clicking noises...

I initially had some problems powering up - it seems the metal case was to blame... I have taken everything out of the chassis I made to test and it powers up fine.

Is there some tests I can do to track down the problem?

Regards,

Paul Ross, Devon UK
  Reply With Quote
Old 17th April 2009, 06:18 PM   #2
DcibeL is offline DcibeL  Canada
diyAudio Member
 
DcibeL's Avatar
 
Join Date: May 2003
Location: Saskatchewan
Default Re: No sound from reboxed t-amp

Quote:
Originally posted by brentkrew
I initially had some problems powering up - it seems the metal case was to blame... I have taken everything out of the chassis I made to test and it powers up fine.
What's connected to the chassis? Photos of your wiring / connection in the chassis would help a lot.
__________________
The power of Science compels you!
  Reply With Quote
Old 17th April 2009, 08:50 PM   #3
diyAudio Member
 
Join Date: Apr 2003
Location: Portland,Oregon
Blog Entries: 4
Send a message via AIM to DigitalJunkie
Are the new terminals insulated from the chassis? Perhaps the speaker outputs are shorted to the case?
  Reply With Quote
Old 17th April 2009, 11:14 PM   #4
diyAudio Member
 
Join Date: Jun 2006
Default No output from reboxed t-amp

Hi all,

(Been pointed here after posting in the chip amps section - sorry)

I have been reboxing my original t-amp. Like on the TNT website, just new terminals - no new caps etc.

I am not getting any output from the amp on either channel. I initially had some problems powering up. I was getting clicking noises from the amp. It seems the metal case was causing the problem because I have now taken everything out of the case and it powers up fine.

Here is some photos to give a rough idea of how it looked before i removed everything. I tried the 3.5mm input and the phono using croc clips. Pot is 100k from maplin.

Pics here

Here

and here
  Reply With Quote
Old 17th April 2009, 11:18 PM   #5
Speakerholic
diyAudio Moderator
 
Cal Weldon's Avatar
 
Join Date: Jan 2004
Location: Near Vancouver
Hi,

I merged the two threads and got rid of the duplicate photos and the redirect post from pacificblue so if it seems like something is out of place, that's why.
__________________
Next stop: Margaritaville
Some of Cal's stuff | Cal Weldon Consulting
  Reply With Quote
Old 17th April 2009, 11:21 PM   #6
diyAudio Member
 
Join Date: Jan 2007
Location: Minnesota
Perhaps take it out of the chassis and try to see if it still works. If it does you probably should look into how you are installing it in the chassis.
  Reply With Quote
Old 17th April 2009, 11:26 PM   #7
diyAudio Member
 
Join Date: Jun 2006
Have been testing everything free of the case and it powers up ok but no sound.

Think i'll mount everything on a plastic back panel if i get it working.

Worried somthing got fried when powering up in the case.
  Reply With Quote
Old 18th April 2009, 04:17 AM   #8
slam is offline slam  United States
diyAudio Member
 
Join Date: Jan 2005
Location: CA
I got those click sound from T-amp before when I accidentally grouded of the "ground" of the speaker output by hooking it up the to a scoop. The speaker -ve output of T-map is not grounded. Maybe you grounded the -ve output to the case?
  Reply With Quote
Old 19th April 2009, 04:29 PM   #9
diyAudio Member
 
Join Date: Jun 2006
I could not get any joy from this amp. I think maybe it got wrecked by speaker terminals touching metal case?

I dug out my spare t-amp board --- i had trouble bridging the caps with my old soldering iron. Did the bass improvement mod as per audio1st diagram... powered up first time and sounds excellent.

thanks for your suggestions anyway guys. now to refine the case i made with plastic back panel...
  Reply With Quote
Old 13th October 2011, 11:03 AM   #10
masood is offline masood  India
diyAudio Member
 
Join Date: Dec 2010
Location: fatehpur
hi all,
i have just assembeled 50w maplin amplifier i am cofused to wiring of psu and speaker can anybody help me.thanking you all.
  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
SE sound vs Ultra Linear sound flysig Tubes / Valves 1 9th May 2009 10:21 PM
Eighteen Sound (18 Sound) NSD 1095N Compression Drivers and XT1086 Horns opc Swap Meet 6 1st May 2009 03:48 AM
Roland VS-1 Sound Module - No Sound! jazzbee Instruments and Amps 1 3rd March 2006 08:39 PM


New To Site? Need Help?

All times are GMT. The time now is 04:39 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