Symasym PCB - Page 5 - 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 8th December 2008, 12:22 PM   #41
Account disabled at member's request
 
MJL21193's Avatar
 
Join Date: Mar 2007
They don't hurt. They can increase stability and for this amp, that's a good thing
Another suggestion: There isn't a need for the ground plane you have there. You could run wide traces back to the star, especially from the 2 bigger caps on the output stage. Right now, the front end decoupling ground trace is wider than the output decoupling.

Also, look at making the output trace wider. This carried all of the current the amp provides.
  Reply With Quote
Old 8th December 2008, 12:54 PM   #42
Khron is offline Khron  Romania
diyAudio Member
 
Join Date: Jul 2005
Location: Finland
Send a message via AIM to Khron Send a message via MSN to Khron Send a message via Yahoo to Khron
Thanks again for the tips Here's revision whatever-it-is
Attached Images
File Type: gif symasym.gif (64.9 KB, 490 views)
  Reply With Quote
Old 9th December 2008, 11:39 AM   #43
Khron is offline Khron  Romania
diyAudio Member
 
Join Date: Jul 2005
Location: Finland
Send a message via AIM to Khron Send a message via MSN to Khron Send a message via Yahoo to Khron
So... is this last iteration good to go?
  Reply With Quote
Old 9th December 2008, 11:45 AM   #44
roender is offline roender  Romania
diyAudio Member
 
roender's Avatar
 
Join Date: Sep 2006
Move some components ...
Attached Images
File Type: gif symasym.gif (66.1 KB, 429 views)
  Reply With Quote
Old 9th December 2008, 11:57 AM   #45
lineup is offline lineup  Sweden
diyAudio Member
 
lineup's Avatar
 
Join Date: Dec 2005
Location: the north
My guess is that roender thinks about keep a distance
between hot power transistors and heatsink and the electrolyt capacitors.
Higher temperatures will shorten the life of lyt-caps.
__________________
lineup
  Reply With Quote
Old 9th December 2008, 12:01 PM   #46
Account disabled at member's request
 
MJL21193's Avatar
 
Join Date: Mar 2007
I think it has more to do with the shortest path to ground form the highest source of current on the board.
  Reply With Quote
Old 9th December 2008, 12:02 PM   #47
roender is offline roender  Romania
diyAudio Member
 
roender's Avatar
 
Join Date: Sep 2006
Quote:
Originally posted by lineup
My guess is that roender thinks about keep a distance
between hot power transistors and heatsink and the electrolyt capacitors.
Higher temperatures will shorten the life of lyt-caps.

Yes and no. The main reason is to keep as small as possible the ground line between decoupling capacitors, as that line is highly polluted with half waves rectified output signal
  Reply With Quote
Old 9th December 2008, 02:30 PM   #48
Khron is offline Khron  Romania
diyAudio Member
 
Join Date: Jul 2005
Location: Finland
Send a message via AIM to Khron Send a message via MSN to Khron Send a message via Yahoo to Khron
Well, this is about as close as i could get them to the middle (within practical limits)...
Attached Images
File Type: gif symasym.gif (63.7 KB, 375 views)
  Reply With Quote
Old 9th December 2008, 02:54 PM   #49
roender is offline roender  Romania
diyAudio Member
 
roender's Avatar
 
Join Date: Sep 2006
One more step ...
Attached Images
File Type: gif symasym.gif (64.8 KB, 375 views)
  Reply With Quote
Old 9th December 2008, 04:11 PM   #50
Khron is offline Khron  Romania
diyAudio Member
 
Join Date: Jul 2005
Location: Finland
Send a message via AIM to Khron Send a message via MSN to Khron Send a message via Yahoo to Khron
"One more step" accomplished, cap'n
Attached Images
File Type: gif symasym.gif (63.5 KB, 361 views)
  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
Troubleshooting your Symasym anatech Solid State 235 22nd September 2011 09:40 PM
FS 2* DIY Symasym boards Andypairo Swap Meet 11 1st February 2009 01:59 PM
symasym 5_3 boards traw Swap Meet 6 11th May 2007 09:41 AM


New To Site? Need Help?

All times are GMT. The time now is 02:58 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