HOW TO MAKE A PROPER AMPLIFIER - 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 12th June 2012, 02:22 PM   #1
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Default HOW TO MAKE A PROPER AMPLIFIER

Here is an example of an amplifier that eventhough made almost 15 years ago preserve some rules that a lot of people scream about in our forum for many years ( for people that manufacture and construct ) and the amp it shelf sets a level of perfection in amplifier construction .

To my understanding what makes the construction perfect is that the designer had a perfect relation with the pcb and production engineers and set up rules that in no chance should be overlooked .

In the audio history is a common secret that things that designed from grate designers like NP for example when ended up in the production line results was seriously altered and final product was actually compromised by the production engineers or the accountant's office . Adcom i think is one of them but it should be a lot more ...

Important thing is to notice that amplifier achieves superior performance with use of simple material that can be found anywhere without the use of any exotic parts .


down under i will post a few pictures and a few comments on this superior amplifier

Click the image to open in full size.

here is the general picture , middle 60.000 bank of caps , clever pcb even distribution , less wiring , very clean work with detail and order .

Click the image to open in full size.

Here is the front board , switcable balanced inputs, ground lift switch , LTP placed a few cm from input RCA , on board you have the first stages of the amp up to the pro drivers area ( very clever since that area is the most clean and most far away from dirty stuff like the psu and output combo zobel /inductor/dumper ) loads of decoupling/bypass for this input stage 100mf +3.3mf+100nf per rail per channel , thermal junction on the LTP , arrays of input capacitors 2.2 mfd X3 times +100nf instead of any exotic capacitor of 6-10mfd less microphonic and much faster ( i think )

Notice also that the manufacturer had the balls to do what is proper IE add decoupling caps down under the board on the input IC hardwired standing on the air to benefit from them as close to IC is possible eventhough this doesn't look in order and neat .


Click the image to open in full size.

Here is output detail while 8 mosfets form the output while the arrangement is 4 N and 4 P the implementation is N-P-N-P N-P-N-P resulting absolutely even distribution of power among the mosfets but also combined with a vbe multiplier in the middle an amplifier without any chance for any thermal run away

Click the image to open in full size.

Enjoy the output board with all the dirty stuff on it zobel inductor dumper that of course features separated return to 0Volts in order to keep the amplifier's ground as clean is possible

notice also that all protections of the amp ( deferential overload , dc , thermal , and short circuit) are mostly around optocouplers .


ladies and gents you have enjoyed an audio masterpiece from PERREAUX
THE PERREAUX 350 proudly made in nuclear free New Zealand !!!!

kind regards
sakis
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

Last edited by east electronics; 12th June 2012 at 02:27 PM.
  Reply With Quote
Old 12th June 2012, 02:25 PM   #2
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
Click the image to open in full size.
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 12th June 2012, 02:29 PM   #3
Banned
 
Join Date: Apr 2012
..but where to the tubes go?
  Reply With Quote
Old 12th June 2012, 02:34 PM   #4
diyAudio Member
 
east electronics's Avatar
 
Join Date: Jan 2006
Location: Athens GREECE
ha ha ha that was a good one !!!!

Dear Alvis sorry to disappoint you but my goal is to work with amplifiers and after i am finished the expectancy will be 100 years of domestic use so tubes are out of the question from default .

( this is not a joke i have the means to justify it )

happy regards sakis
__________________
SERVICE ΕΝΙΣΧΥΤΩΝ ΚΑΙ ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr
  Reply With Quote
Old 12th June 2012, 02:38 PM   #5
Bonsai is offline Bonsai  Taiwan
diyAudio Member
 
Bonsai's Avatar
 
Join Date: Jul 2003
Location: Taipei, Taiwan
Nicely built amplifier and I have read a lot of good things about them also.
__________________
bonsai
Amplifier Design and Construction for MUSIC! http://hifisonix.com/
  Reply With Quote
Old 12th June 2012, 02:39 PM   #6
Banned
 
Join Date: Apr 2012
I am just teasing, seriously, how many gig of RAM does it have?
  Reply With Quote
Old 12th June 2012, 02:51 PM   #7
Bonsai is offline Bonsai  Taiwan
diyAudio Member
 
Bonsai's Avatar
 
Join Date: Jul 2003
Location: Taipei, Taiwan
??

No digits here. This is power analog.
__________________
bonsai
Amplifier Design and Construction for MUSIC! http://hifisonix.com/
  Reply With Quote
Old 12th June 2012, 04:02 PM   #8
a.wayne is offline a.wayne  United States
Sin Bin
 
Join Date: May 2008
Location: Front Row Center
Nicely built amplifier , had one for about two weeks ( quickly sold on) , to say it was weak sounding would be an understatement ..
  Reply With Quote
Old 12th June 2012, 04:16 PM   #9
a.wayne is offline a.wayne  United States
Sin Bin
 
Join Date: May 2008
Location: Front Row Center
To Clarify it was an pmf3150 , many moons ago ....
  Reply With Quote
Old 12th June 2012, 04:49 PM   #10
Banned
 
Join Date: Jan 2005
This is how amplifiers should be made, big, heavy and needing a engine hoist/fork lift to lift/move them.

None of that plastic featherweight class d crap you see in the stores nowdays.
  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
Make a car amplifier HeadHunter Car Audio 20 20th October 2013 04:43 PM
Do you want to submitted make an amplifier? adorn751 Solid State 0 4th April 2012 05:35 PM
i want to make a sub woofer amplifier smartguysforeve Subwoofers 3 22nd March 2006 01:07 PM
proper soundcard to amplifier cables Myren Everything Else 0 21st December 2001 06:48 AM


New To Site? Need Help?

All times are GMT. The time now is 04:36 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