SOAP EVOLUTION - Simple OpAmp Pre - 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 2nd February 2010, 09:27 AM   #1
zei is offline zei  Sweden
diyAudio Member
 
Join Date: Feb 2005
Location: Gothenburg, Sweden
Default SOAP EVOLUTION - Simple OpAmp Pre

This aint no revolution, however it is the SOAP Evolution ..

After some time of silence i now have tuned the SOAP preamp to a more complete version.

There was some request to have it even more simpel then the MKIII but i decided that it already was very simple (and cheap).

This version contains a full onboard PSU. Onboard trafo, Dual discrete rectifier, room for more smooting caps.
The in/out caps has switched placed for placement reason. (Out caps are generelly bigger)

Grounding has been optimized even further.

This version will make installation a piece of cake with less cabling.

Testing will follow shortly.

A first glance on how it looks..

Click the image to open in full size.

/JZ
__________________
Tala är tiga, silver är guld
  Reply With Quote
Old 2nd February 2010, 06:55 PM   #2
zei is offline zei  Sweden
diyAudio Member
 
Join Date: Feb 2005
Location: Gothenburg, Sweden
Default Something more..

Schematics and layout..

Sorry for the terrible slow loading of the pics. pic server seems worse then ever..
__________________
Tala är tiga, silver är guld

Last edited by zei; 2nd February 2010 at 06:56 PM. Reason: Bad pic.. new coming up
  Reply With Quote
Old 2nd February 2010, 07:00 PM   #3
zei is offline zei  Sweden
diyAudio Member
 
Join Date: Feb 2005
Location: Gothenburg, Sweden
Click the image to open in full size.


Click the image to open in full size.


/JZ
__________________
Tala är tiga, silver är guld
  Reply With Quote
Old 10th March 2010, 10:27 AM   #4
AndrewT is offline AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
can you insert a separate ground track for C5+C6?
The opamp decoupling shares the signal in your present layout.
__________________
regards Andrew T.
  Reply With Quote
Old 10th March 2010, 06:14 PM   #5
zei is offline zei  Sweden
diyAudio Member
 
Join Date: Feb 2005
Location: Gothenburg, Sweden
Hi AndrewT

Thanx for the tip and heads up..

Proberly not without going 2layer..
Even if it looks like a 2 layer design i only made the groundtrace red to be able to "see" it easier. It is made with one copper layer so that anyone can make there own. Keep it simple

However, Even without AndrewT,s nanooptimized grounding.. It has a pitchblack deadsilent background.. No groundnoise, hum or whatever..

If anyone want to give it a try, PM me for a PDF of the layers..

I maaaaybe maybe will have a bunch of these promade.. maybe.

/JZ
__________________
Tala är tiga, silver är guld
  Reply With Quote
Old 10th March 2010, 10:36 PM   #6
tomchr is offline tomchr  United States
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Greater Seattle Area
I would route the ground for the 100k R12, R13 separately and not share it with the decoupling ground for the op-amp. You should be able to weave it through on the bottom (blue) layer. Same for R1, R6.

If you stay with the board as-is, I suggest dropping the top (red) traces to the bottom (blue) layer and having the board made with only one layer. I don't see any reason to go through the expense of a 2-layer board unless you have to. I think even with my mods above, you might be able to make it with one layer.

~Tom
  Reply With Quote
Old 11th March 2010, 07:22 AM   #7
zei is offline zei  Sweden
diyAudio Member
 
Join Date: Feb 2005
Location: Gothenburg, Sweden
Hi Tom.

Thanx for the ground routing tip. i,ll see if i think it is worth it

And excuse my english, Maybe i explain to poor but in the Answer to AndrewT,s post i stated that this is in fact a one layer design.
I have only the groundlayer i "red" (top layer)so that it is easier to see

If/when sent to a PCB factory i,ll change so that all is on the same layer.

/JZ
__________________
Tala är tiga, silver är guld
  Reply With Quote
Old 12th March 2010, 08:09 AM   #8
jaste is offline jaste  Sweden
diyAudio Member
 
Join Date: Dec 2005
Location: Stockholm
What´s the size of the board?
  Reply With Quote
Old 14th March 2010, 02:18 PM   #9
zei is offline zei  Sweden
diyAudio Member
 
Join Date: Feb 2005
Location: Gothenburg, Sweden
I,ll messure it tomorrow..

Thanx

/JZ
__________________
Tala är tiga, silver är guld
  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
SOAP MKIII (Simple OpAmp Pre) With onboard PSU zei Chip Amps 206 4th August 2009 12:55 PM
A Simple opamp question? Dxvideo Chip Amps 29 3rd April 2009 01:42 PM
help me with this opamp pre-amp fastvideo Solid State 9 20th July 2008 10:55 PM
SOAP - Simple OpAmp Pre zei Chip Amps 14 12th December 2007 02:15 AM


New To Site? Need Help?

All times are GMT. The time now is 09:24 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