Amplifier project(pics) - 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 15th December 2003, 02:41 PM   #1
Gunders is offline Gunders  Norway
diyAudio Member
 
Join Date: Nov 2002
Location: Norway
Default Amplifier project(pics)

Here's some pictures of an amplifierproject who use 2sc5200 and 2SA1943 as output transistors.
2SJ109 is used at the input.
it's a simple design.
Attached Images
File Type: jpg dscn5707a.jpg (68.0 KB, 915 views)
  Reply With Quote
Old 15th December 2003, 02:42 PM   #2
Gunders is offline Gunders  Norway
diyAudio Member
 
Join Date: Nov 2002
Location: Norway
another one
Attached Images
File Type: jpg dscn5711a.jpg (69.8 KB, 893 views)
  Reply With Quote
Old 15th December 2003, 02:44 PM   #3
Gunders is offline Gunders  Norway
diyAudio Member
 
Join Date: Nov 2002
Location: Norway
....
Attached Images
File Type: jpg dscn5716a.jpg (83.8 KB, 869 views)
  Reply With Quote
Old 15th December 2003, 04:55 PM   #4
Gunders is offline Gunders  Norway
diyAudio Member
 
Join Date: Nov 2002
Location: Norway
...
Attached Images
File Type: jpg dscn5729a.jpg (78.6 KB, 798 views)
  Reply With Quote
Old 15th December 2003, 05:00 PM   #5
Gunders is offline Gunders  Norway
diyAudio Member
 
Join Date: Nov 2002
Location: Norway
Schematic
Attached Images
File Type: jpg power.jpg (32.6 KB, 818 views)
  Reply With Quote
Old 15th December 2003, 06:09 PM   #6
nbcd is offline nbcd  Romania
diyAudio Member
 
Join Date: Apr 2003
Location: suceava
Default cool

great vork Gunderz
how does it sounds?
how about showing us the PCB?
do u have it?
i also want to ask which is the output power
Regards!
__________________
eugen
  Reply With Quote
Old 15th December 2003, 06:18 PM   #7
Gunders is offline Gunders  Norway
diyAudio Member
 
Join Date: Nov 2002
Location: Norway
well, there's no sound from the amplifier yet. We are not finished at this moment.
The amplifier does actually contain to amplifiers at the same PCB, it meant for bi-amping. One amp for bass and one amp for midrange and treble.

The power output is at leats 100W@8ohm, but could probably take more.

It's one of my friends who have made the PCB layout.
I can post the layout tomorrow.
  Reply With Quote
Old 15th December 2003, 07:50 PM   #8
Steven is offline Steven  Netherlands
diyAudio Member
 
Steven's Avatar
 
Join Date: Oct 2003
Location: The Netherlands
Hi Gunderz,

Looks good, but I think you should add some protection for Q7 and Q8. If you drive the amplifier hard into clipping Q8 will go into saturation and Q7 will blow because its Vce is quite high and suddenly also Ic will be high. You can solve this by incorporating a collector resistor for Q7.

Steven
  Reply With Quote
Old 16th December 2003, 12:29 AM   #9
MWP is offline MWP  Australia
diyAudio Member
 
Join Date: Oct 2002
Location: Adelaide, South Australia
You might have some problems cooling the beast.

Those haetsinks dont look very large, and they are also mounted the wrong way (=no convection air movement).
  Reply With Quote
Old 16th December 2003, 06:51 AM   #10
Gunders is offline Gunders  Norway
diyAudio Member
 
Join Date: Nov 2002
Location: Norway
We are aware of the size of the heatsinks.
We have measured the thermal resistance to be 0,7 with the heatsink mounted the same way as the pictures show.
The chassis seen on the pictures are taken from an old amplifier.

By the way.. at the front you could see a 4-order active linkwitz-riley filter.
  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
My new unique (i think) DIY project (pics!!) Shpoop Multi-Way 33 27th June 2007 05:01 AM
pics of latest project revisorn Multi-Way 3 5th September 2003 02:44 PM
Pics - 1st DIY Speaker Project omni1 Multi-Way 1 19th July 2003 01:59 PM
My p3a amplifier project, pics. Jean Solid State 13 8th December 2002 03:00 AM


New To Site? Need Help?

All times are GMT. The time now is 07:42 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