About this PS Design and Ground Scheme - 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 1st December 2002, 02:35 AM   #1
aborza is offline aborza  United States
diyAudio Member
 
Join Date: Nov 2002
Location: Sunny Florida
Question About this PS Design and Ground Scheme

Hi,

I drew up this PS design and wonder if it looks ok. Everything on the design is stolen from somone. Thanks, Nelson (TOAO), Syl and others not named.

I am concerned with a few things:

Are all of those film caps on the electrolytics a waste?

Is the RC filter for the front end properly drawn?

How do I calculate the R and the C for that filter?

Is there a better design for the bridge diode snubbers?

Is the grounding scheme the right way to go?

The Schematic follows.

Thanks
Attached Images
File Type: jpg psujpg2.jpg (64.0 KB, 287 views)
  Reply With Quote
Old 1st December 2002, 02:47 AM   #2
halojoy is offline halojoy  Sweden
On Hiatus
 
Join Date: Nov 2002
I think Bridge B2 and B4 should be mirrored left to right
also B4 lacks one DC output

For the R in RC, you need to know how much voltage drop
you can accept. This drop depends on the current consumption.
After that you select the caps to acheive
the filter roll off frequency.

This frequency should of cause be somewhere below 100 Hz
to block hum from trafo, more or less.
A bridge rectifier produces 2x50Hz signals.
This cut off (f) can be as low as 1 Hz, with big Caps

RC=1/(2pi x f)
C=1/(2pi x f x R)
f=1/(2pi x RC)
  Reply With Quote
Old 1st December 2002, 02:57 AM   #3
aborza is offline aborza  United States
diyAudio Member
 
Join Date: Nov 2002
Location: Sunny Florida
Talking Ooops

Saw something myself!

The output from B3 Should read "+V Right Driver & Output"

And

F2 and F3 might be replaced with four fuses on the other side of the node to the right. That is, one fuse for + and - for each channel.

Thoughts?

Thanks,

ab
  Reply With Quote
Old 2nd December 2002, 01:11 AM   #4
aborza is offline aborza  United States
diyAudio Member
 
Join Date: Nov 2002
Location: Sunny Florida
Thumbs up Thanks

Thanks for the input halojoy.

The changes have been made.

ab
  Reply With Quote
Old 2nd December 2002, 01:29 AM   #5
jwb is offline jwb  United States
diyAudio Member
 
jwb's Avatar
 
Join Date: Mar 2002
Location: San Francisco, USA
Send a message via AIM to jwb
Quote:
Originally posted by halojoy
This frequency should of cause be somewhere below 100 Hz
to block hum from trafo, more or less.
A bridge rectifier produces 2x50Hz signals.
This cut off (f) can be as low as 1 Hz, with big Caps
In the USA, the frequency of concern will be 120Hz.
  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
Car amp design, differential input, ground Davide82 Car Audio 11 12th November 2008 07:41 PM
Active ground cmoy: Help me learn PCB design TheSeekerr Chip Amps 2 23rd July 2008 09:20 PM
Parallel LM3886, input ground, power ground, safety resistor and oscillations. markiemrboo Chip Amps 5 9th August 2007 03:50 PM
Ground scheme athos56 Tubes / Valves 27 12th April 2007 11:34 AM
does connecting mains ground with circuit ground create a ground loop? jarthel Everything Else 0 25th June 2003 12:55 PM


New To Site? Need Help?

All times are GMT. The time now is 02:23 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