please comment my pcb - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

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
Reply
 
Thread Tools Search this Thread
Old 5th November 2008, 11:16 AM   #1
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Default please comment my pcb

please comment my pcb Click the image to open in full size.
zobel network is to be located at outpout connector and return to star ground with a separate cable
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 5th November 2008, 11:26 AM   #2
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Hi Sakis,
The only problem I suspect is if you are making two of these to run off one PSU. If you are you need two ground returns to the PSU star from each PCB. Otherwise the two channels will interact.
If not it's OK
  Reply With Quote
Old 5th November 2008, 11:29 AM   #3
Account disabled at member's request
 
MJL21193's Avatar
 
Join Date: Mar 2007
Hi,
Looks good! Very nicely organized.
One thing:
You have the input ground direct to the power ground?
  Reply With Quote
Old 5th November 2008, 11:29 AM   #4
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Read all of this,
3 stage LIN topology - NFB tappings?
  Reply With Quote
Old 5th November 2008, 11:39 AM   #5
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Default strangelly yes

Quote:
Originally posted by MJL21193
Hi,
Looks good! Very nicely organized.
One thing:
You have the input ground direct to the power ground?

in fact most of times i did this i had less problems than running ground through 10R resistor
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 5th November 2008, 11:41 AM   #6
Account disabled at member's request
 
MJL21193's Avatar
 
Join Date: Mar 2007
Also you could change as I have shown below to avoid that jumper.
Attached Images
File Type: gif 114.gif (37.9 KB, 692 views)
  Reply With Quote
Old 5th November 2008, 11:50 AM   #7
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
 
Mooly's Avatar
 
Join Date: Sep 2007
Make sure you read that link. It's very relevant
  Reply With Quote
Old 5th November 2008, 12:37 PM   #8
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Default this the config

i have in mind

never tryied that exact config but will see when pcb is ready
Attached Images
File Type: jpg ground config 1.jpg (56.5 KB, 674 views)
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 5th November 2008, 12:53 PM   #9
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Hi Sakis,
I have tried various stereo layouts similar to your last post and I could never get them hum and buzz free.
A monobloc where the Audio Ground is on the PCB works OK, but not when you connect more than one channel.

I don't see your schematic but I wonder if the NFB route sends the inverting input from the correct end of the second (lower leg) resistor?
On the same NFB route, it appears to be tapped off the emitter resistor instead of from the speaker output.
__________________
regards Andrew T.
  Reply With Quote
Old 5th November 2008, 12:55 PM   #10
Account disabled at member's request
 
MJL21193's Avatar
 
Join Date: Mar 2007
Default Re: this the config

Quote:
Originally posted by sakis
i have in mind

never tryied that exact config but will see when pcb is ready



This is like polluting your drinking water by connecting the toilet to the water well.

Set up an input signal ground that is isolated from the main power ground.
Return the speaker ground to the main power ground, not on the amp board but on the power supply board. Return the Zobel here too.
  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
Please comment my pcb P3a roly3055 Solid State 53 8th June 2012 08:36 PM
Please comment my PCB! Mlaen Solid State 31 11th February 2009 09:35 AM
please comment my pcb east electronics Solid State 15 28th July 2008 08:24 AM
Please comment for my new CFB amp lukio Solid State 11 9th February 2004 03:59 AM


New To Site? Need Help?

All times are GMT. The time now is 12:38 AM.


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