Commercial Gainclone kit- building instructions - Page 122 - diyAudio
Go Back   Home > Forums > Commercial Sector > Vendor Forums > Audio Sector

Audio Sector Kits & PC boards from AudioSector

Reply
 
Thread Tools Search this Thread
Old 25th August 2010, 03:34 PM   #1211
diyAudio Member
 
pmchoong's Avatar
 
Join Date: Jan 2008
Location: Kuala Lumpur
this is how i hook up everything......at present i am using one transformer to test both mono block channel.....the other transformer is still wip
Attached Images
File Type: png gc diagram.png (104.6 KB, 332 views)
  Reply With Quote
Old 25th August 2010, 03:38 PM   #1212
diyAudio Member
 
pmchoong's Avatar
 
Join Date: Jan 2008
Location: Kuala Lumpur
should i resolder the chip again?
  Reply With Quote
Old 25th August 2010, 03:46 PM   #1213
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
If the buzzing can be detected with both channels connected separately, it's probably something else than bad soldering. It's quite unusual to get a hum with a single mono channel, unless the buzzing comes from your source?
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 25th August 2010, 03:46 PM   #1214
diyAudio Member
 
pmchoong's Avatar
 
Join Date: Jan 2008
Location: Kuala Lumpur
dc offset at 14.5mv with volume down but when volume turn up to 9 o'clock....dc offset is at 7.9mv....and when turn all the way up, dc offset at 300mv!
  Reply With Quote
Old 25th August 2010, 03:49 PM   #1215
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
Without input coupling cap it's normal for offset to change up to 80mV or so.
300mV high could indicate that your source produces some offset as well.
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 25th August 2010, 03:55 PM   #1216
diyAudio Member
 
pmchoong's Avatar
 
Join Date: Jan 2008
Location: Kuala Lumpur
it change to 7.9 (7 point 9)mv....not 79mv
  Reply With Quote
Old 25th August 2010, 04:18 PM   #1217
diyAudio Member
 
pmchoong's Avatar
 
Join Date: Jan 2008
Location: Kuala Lumpur
Quote:
Originally Posted by Peter Daniel View Post
.... It's quite unusual to get a hum with a single mono channel, unless the buzzing comes from your source?
Stupid me....i forgot to turn the preamp source selector to tuner.....sorry everybody.....i feel very bad making you guys putting on your thinking cap to discover something i did stupid......now i got sound coming out from the speaker except the buzzing sound still exist...errrrrg...how the heck can i get rid of this buzz sound..it is very low and audible on close up......on both mono....same issue....how come? When i switch off the preamp, i still can hear this buzz from the speaker

Last edited by pmchoong; 25th August 2010 at 04:20 PM.
  Reply With Quote
Old 25th August 2010, 04:21 PM   #1218
diyAudio Member
 
Peter Daniel's Avatar
 
Join Date: Jul 2002
Location: Toronto, Canada
Send a message via AIM to Peter Daniel
If your source is tuner it's quitepossible buzzing comes from it. Do you get hum with volume all way down?
__________________
www.audiosector.com
“Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC
  Reply With Quote
Old 25th August 2010, 04:24 PM   #1219
diyAudio Member
 
pmchoong's Avatar
 
Join Date: Jan 2008
Location: Kuala Lumpur
sounds good except for the buzzz...is it the transformer?
  Reply With Quote
Old 25th August 2010, 04:25 PM   #1220
diyAudio Member
 
pmchoong's Avatar
 
Join Date: Jan 2008
Location: Kuala Lumpur
Quote:
Originally Posted by Peter Daniel View Post
If your source is tuner it's quitepossible buzzing comes from it. Do you get hum with volume all way down?
yes....even if i turn off the preamp
  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
Commercial complete Gainclone kit for a beginner? gychang Chip Amps 365 4th October 2011 09:19 AM


New To Site? Need Help?

All times are GMT. The time now is 08:19 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