Ground Wiring Advice Needed - 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 21st July 2012, 03:22 PM   #1
Vostro is offline Vostro  South Africa
diyAudio Member
 
Vostro's Avatar
 
Join Date: May 2012
Location: Other side of the fence
Default Ground Wiring Advice Needed

After building my monoblock amplifiers, it's now time to put them in an enclosure.

Ive added a rough lauout, but I'm abit confuced about the ground wiring.

Can someone pls advice on how to connect the grounds in this type of layout.

Time to show those Paint skills .

Thanks
Attached Images
File Type: jpg LayoutPower.jpg (66.1 KB, 209 views)

Last edited by Vostro; 21st July 2012 at 03:25 PM.
  Reply With Quote
Old 21st July 2012, 03:58 PM   #2
diyAudio Member
 
Join Date: Oct 2011
Quick guide on Grounding
  Reply With Quote
Old 21st July 2012, 04:14 PM   #3
diyAudio Member
 
KatieandDad's Avatar
 
Join Date: Nov 2011
Location: UK
Sorry but your Protection Board doesn't make any sense. Where does it get itws power from ?

Your diagram shows a relay across L and N which implies that it is switching the mains. It cannot switch the mains if it is getting its power from the Vcc of the amps.
  Reply With Quote
Old 21st July 2012, 06:25 PM   #4
Vostro is offline Vostro  South Africa
diyAudio Member
 
Vostro's Avatar
 
Join Date: May 2012
Location: Other side of the fence
Ive only started on drawing out the protection board circuit,
Not really decided on what it will do, just been thinking of what I would like it to do,
Originally I liked the idea of pulling power from the amp supply, but thats undecided at the moment, might use a secondary transformer, and features would be taken into consideration.
  Reply With Quote
Old 21st July 2012, 06:53 PM   #5
Vostro is offline Vostro  South Africa
diyAudio Member
 
Vostro's Avatar
 
Join Date: May 2012
Location: Other side of the fence
Thanks for the link OnAudio, but each amp has its own Filtering,
thats what confuses me.

Or should the idea of each module having its own capacitor filtering be changed to
-local decoupling, with modules fed from singular big capacitor bank.

None of the boards to be used in final project have been etched yet, just some prototypes,
If I need to make changes and re-etch boards that ok,
using this as a hoby and learning experience,
so taking it slowly and redoing things untill Im happy with the result

Regards

Last edited by Vostro; 21st July 2012 at 07:02 PM.
  Reply With Quote
Old 21st July 2012, 07:08 PM   #6
diyAudio Member
 
Join Date: Feb 2009
you can do it like this.
Attached Images
File Type: png earth.png (25.3 KB, 177 views)
  Reply With Quote
Old 21st July 2012, 07:08 PM   #7
diyAudio Member
 
Join Date: Feb 2005
Location: S.England
ummm, if Naim, big fat capacitor local to the transformer / rectifier then feeding power to boards with smaller local decoupling. Think of the big fat cap as a (+) and (-) star point if taking this approach.

But for me I like the idea of big local decoupling fed from stars at the rectifier, (+) rectified feed possibly via a small valued power resistor (or choke) to somewhat separate the PSUs of each channel.

A
  Reply With Quote
Old 22nd July 2012, 06:06 PM   #8
Vostro is offline Vostro  South Africa
diyAudio Member
 
Vostro's Avatar
 
Join Date: May 2012
Location: Other side of the fence
Sill confused,
I am leaning toward removing the 10 000uf s from the boards and having the amps share a capacitor bank.

But if I didn't, would this be correct wiring,
If not please tell me what to change.

Regards
Attached Images
File Type: jpg lay2b.jpg (287.4 KB, 146 views)
  Reply With Quote
Old 23rd July 2012, 04:13 PM   #9
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
You seem to be connecting dirty grounds (e.g. transformer secondary CT) to clean grounds (e.g. star point). Everyone does this, but I don't know why because it guarantees buzz.

First make sure you amp PCBs have a dirty ground connection for the smoothing caps and a clean ground connection for signals. These two grounds can be/must be connected on the PCB. Each dirty ground should go to the CT. The existing thick lead from CT to star ground must be removed. The clean grounds from the amp PCBs should go to star ground.

Doing this will keep charging pulses away from the star ground but you will have ground loops. Unavoidable if you have one secondary/bridge feeding two separate cap banks and amps on two separate PCBs. The whole amp architecture, including PCB design, must take account of grounding.
  Reply With Quote
Old 23rd July 2012, 04:39 PM   #10
jitter is offline jitter  Netherlands
diyAudio Member
 
jitter's Avatar
 
Join Date: Aug 2004
Location: Eindhoven, The Netherlands
Quote:
Originally Posted by Vostro View Post
Sill confused,
I am leaning toward removing the 10 000uf s from the boards and having the amps share a capacitor bank.

But if I didn't, would this be correct wiring,
If not please tell me what to change.

Regards
I would advise you read this article:
Audio Component Grounding and Interconnection
  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
Ground Wiring and Electrical Noise Reduction. spindre17 Construction Tips 8 6th July 2010 10:03 PM
signal and chassis ground wiring with RCA and XLR mr.duck Solid State 11 6th December 2009 12:50 PM
Ground isolation network / power switch wiring DcibeL Power Supplies 2 5th April 2006 12:43 AM
wiring ground question eelai Everything Else 2 22nd December 2005 01:09 PM
amp wiring, ground problem (wierd) Shift_vigoroso Car Audio 3 3rd December 2003 10:11 PM


New To Site? Need Help?

All times are GMT. The time now is 06:21 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