Where do you return your load? - diyAudio
Go Back   Home > Forums > Amplifiers > Chip Amps

Chip Amps Amplifiers based on integrated circuits

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 18th October 2005, 11:17 AM   #1
diyAudio Member
 
Join Date: May 2003
Location: MA
Default Where do you return your load?

1. amp pcb ground plane?
2. star ground, before amp pcb?
3. star ground at ps?
  Reply With Quote
Old 18th October 2005, 11:25 AM   #2
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Default Re: Where do you return your load?

Quote:
Originally posted by rgrayton
1. amp pcb ground plane?
2. star ground, before amp pcb?
3. star ground at ps?
3, but that could also be on he AMP PCB.
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 18th October 2005, 11:50 AM   #3
diyAudio Member
 
Join Date: May 2003
Location: MA
Hi Russ, I used to live in Bristol, TN and there I learned NASCAR, Vols and Country Music.

I am using Brian's kit and there are both pg+ and pg- on the board. My inclination would be to go to a point equal each, off the board ("star").
But, here is a follow ? Would you return all the channels (eventually 6, for me, but that should really not be any different than 2) to a mutual ps star, or each load return to its own channel?
THX,
-BG
  Reply With Quote
Old 18th October 2005, 12:10 PM   #4
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
My guidance is to make all GNDs terminate at the star GND, so if you have 6 channels all with the same PS, then each channels GND should go to the star GND. The star GND is usually best placed bettween the final caps on the PS.

I hope you enjoyed TN. I love it here. Lots of music
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 18th October 2005, 12:19 PM   #5
diyAudio Member
 
Join Date: May 2003
Location: MA
Quote:
My guidance is to make all GNDs terminate at the star GND, so if you have 6 channels all with the same PS, then each channels GND should go to the star GND. The star GND is usually best placed bettween the final caps on the PS.
How does one define 'same PS'? I am using a single 800VA +/- 25V, 2 diode bridges per ch (one ea rail) on a single pcb, power gnd for each on the ps pcb. Still one star for all channels?
  Reply With Quote
Old 18th October 2005, 12:24 PM   #6
diyAudio Member
 
wes-ninja250's Avatar
 
Join Date: Feb 2005
Location: Kingston, ON
rgrayton -- I have a similar setup to you (twin 3886 boards, twin PS boards, one transformer). My current plan is to create two adjacent star grounds and to join them with a very short, thick wire.

Hopefully, I'll be done this weekend or sooner and can let you know how it works out.

If you beat me to getting done, let me know what you did and how it worked, eh?

Wes
__________________
Do daemons dream of electric sleep()?
  Reply With Quote
Old 18th October 2005, 12:26 PM   #7
diyAudio Member
 
Russ White's Avatar
 
Join Date: Jan 2005
Location: Nashville, TN, USA
Send a message via Yahoo to Russ White
Well in your case you would bring each channels PGND to it respective PS PCB. But just keep in mind, your PS are not isolated from eachother at all if they share a common trafo, and really it is the trafo that sources the GND reference. It should work just fine though. Just be very careful with your cable dressing.
__________________
Less pulp more juice Twisted Pear Audio.
  Reply With Quote
Old 18th October 2005, 01:17 PM   #8
diyAudio Member
 
Join Date: May 2003
Location: MA
not to beat a dead horse, but getting back to the load rtn - return them, ea ch, to the respective "stars" for each ch, then, and in the the words of our friends to the north, eh?
  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
TechTubes - The return of Blackburn awedio Tubes / Valves 23 1st March 2010 08:14 AM
Return of my differential VAS scott wurcer Solid State 85 28th October 2009 04:09 AM
Dynamic load line analysis using music and speaker load Michael Koster Tubes / Valves 0 7th March 2008 08:47 PM
Return to Aikido Hum issues cbutterworth Tubes / Valves 21 10th January 2007 12:59 AM


New To Site? Need Help?

All times are GMT. The time now is 09:42 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