100W Ultimate Fidelity Amplifier - Page 13 - 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 27th May 2010, 07:15 PM   #121
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by maouna View Post
this is the best i can get with my phone camera .its night here now.

i havent tested the psu yet.i will connect the 35A rectifier and put back the short circuit protection.

do you suggest 0.22ohm resistors for short circuit protection ? i am using a 24-0-24 volt /200VA transformer which is +-33 volt dc after rectification and smoothing capacitors.
Use 0.22ohm, with +/-33V DC no need for 35A rectifier you can use 10A.
66Vx10A=660W, and your amplifier will be 75W/4ohm with +/-33V rail voltage, 150W for both channels, with 70% eficiency of AB class you need 200W from PSU minimum, I recomended 300W, but 10A rectifier will be OK.
Regards
  Reply With Quote
Old 27th May 2010, 07:45 PM   #122
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
With 2x24v ac I use this amplifier:
TDA7294 Stereo/Bridge with PSU
  Reply With Quote
Old 28th May 2010, 08:44 AM   #123
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
AX14 also can work on +/-33V DC with same performanse and 75W/4R output power, I recomended TDA7294 just for begginers.

Last edited by apexaudio; 28th May 2010 at 09:04 AM.
  Reply With Quote
Old 28th May 2010, 02:24 PM   #124
maouna is offline maouna  Greece
diyAudio Member
 
Join Date: Oct 2008
i will put the 8A rectifier and test the psu.but im afraid it will get too hot even at 4 amperes.

do you have tone control circuits?i would like to have one.
  Reply With Quote
Old 28th May 2010, 03:58 PM   #125
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by maouna View Post
i will put the 8A rectifier and test the psu.but im afraid it will get too hot even at 4 amperes.

do you have tone control circuits?i would like to have one.
You can put heatsink on 8A rectifier, tone control will be shared in thread:
http://www.diyaudio.com/forums/solid...q-preamps.html
Regards
  Reply With Quote
Old 28th May 2010, 05:31 PM   #126
maouna is offline maouna  Greece
diyAudio Member
 
Join Date: Oct 2008
thank you.

by the way, do you have one pair output amplifier design with opamp at the input?

do those amps sound good or is it better to have discrete components at the input instead of opamps?
  Reply With Quote
Old 28th May 2010, 05:54 PM   #127
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by maouna View Post
thank you.

by the way, do you have one pair output amplifier design with opamp at the input?

do those amps sound good or is it better to have discrete components at the input instead of opamps?
My PA amps use OP-amp at the input on the best possible way. I can't tell you anything about is it better sound than discrete, it's up to you.
Here is schematics of B50 with single darllington pair outputs.
Attached Images
File Type: jpg APEX B50.jpg (203.1 KB, 3756 views)
  Reply With Quote
Old 29th May 2010, 01:43 AM   #128
diyAudio Member
 
Join Date: Oct 2005
apex,
does this nchannel design has pcb,or where thread this came?
Attached Images
File Type: jpg APEX%20NMOS%20AMP[2].jpg (343.6 KB, 3638 views)
  Reply With Quote
Old 29th May 2010, 01:55 AM   #129
diyAudio Member
 
apexaudio's Avatar
 
Join Date: Feb 2010
Location: Serbia
Quote:
Originally Posted by engel dela pena View Post
apex,
does this nchannel design has pcb,or where thread this came?
Yes, but this amp from thread: 150W MOSFET Amplifier with IRFP250x2 I recommended only for fun. If you want nmos amp I sugest to build an ARCAM clone.
Regards
  Reply With Quote
Old 30th May 2010, 02:52 AM   #130
diyAudio Member
 
Join Date: Oct 2005
apex,
do you have this arcam clone design
regards
  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
Good ~100W amplifier percy Solid State 16 3rd April 2013 05:16 PM
New desined 4*100W car amplifier Whortless Car Audio 13 21st July 2011 04:39 AM
Ultimate Amplifier DF Plummer Tubes / Valves 19 23rd March 2011 02:48 AM
Ultimate amplifier glen65 Car Audio 2 19th September 2007 02:15 PM
100W Amplifier Shematic and PCB viki Solid State 2 17th October 2004 11:54 AM


New To Site? Need Help?

All times are GMT. The time now is 09:36 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