Super Ultra Hi Power 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 14th January 2004, 06:48 PM   #1
diyAudio Member
 
Join Date: Jan 2004
Location: Rio de Janeiro, RJ
Send a message via ICQ to PicancoNet Send a message via MSN to PicancoNet
Question Super Ultra Hi Power Amplifier

Can anyone see my amplifier schema ????

http://www.picanconet.hpg.ig.com.br/MeuAmp.gif



Thanks
__________________
Sounds Goods
  Reply With Quote
Old 14th January 2004, 08:47 PM   #2
diyAudio Member
 
Tube_Dude's Avatar
 
Join Date: Mar 2002
Location: Aveiro-Portugal
Default Re: Super Ultra Hi Power Amplifier

Quote:
Originally posted by PicancoNet
Can anyone see my amplifier schema ????

http://www.picanconet.hpg.ig.com.br/MeuAmp.gif



Thanks

Hi Picanco Net!!

Sorry !!!....but someone must tell you....your Super Ultra High Power Amp as it is in your schematic doesn't work!
Um abraço!
Continua a tentar!
__________________
Jorge
  Reply With Quote
Old 14th January 2004, 08:56 PM   #3
diyAudio Member
 
Join Date: Aug 2003
Location: Prague,Czech Republic
Will be, but only a few about 1 microsecond .
  Reply With Quote
Old 14th January 2004, 08:59 PM   #4
Account Disabled
 
Join Date: Apr 2003
Location: US
a few things to think about:

1) the last two pairs of transistors aren't working. you may need to rewire them;
2) you may want to think about how to add some feedback to the circuitry: the 741 is working in open loop, like a comparator.
3) cross-over distortion, anyone?
4) you are blowing the 741. It cannot take +/- 50v supply rails.
5) find something a little bit better to use than the 741?
............

It needs a lot of work before it can sound good.
  Reply With Quote
Old 14th January 2004, 10:56 PM   #5
diyAudio Member
 
john curl's Avatar
 
Join Date: Jul 2003
Location: berkeley ca
This design will not work. Too many mistakes. Please learn more. First, the 741 is 35 years old, and not good for audio. Second, it can ONLY take +/- 22V at best, not +/- 50V. Third, there is no bias resistor on the input. Four, the output cap is unnecessary. Five, there is no feedback loop, so the amp will latch to one power supply. Six, it 'might' put out 250 W max.
Don't be discouraged, but try more to understand the circuit.
  Reply With Quote
Old 14th January 2004, 11:41 PM   #6
diyAudio Member
 
Join Date: Sep 2002
Location: Sweden
I think the others have already pointed out all the serious
errors at least. Well, I think you need to bias also the first
transistor pair since you AC couple from the op amp.

There is no shortcut around learning the basic theory of
transistors and amplifiers I am afraid. Getting a good textbook
on electronics is indispensible, but depending on your background
knowledge may still be difficult to understand. There are also
many good introductory texts on the internet if you search
around.

In addition to this,
try to study a few schematics of working amps and ask yourself
why they look so different from yours. I am sure a lot of people
will be helpful trying to answer your question about these
schematics and how they work.

Just don't try to build your design, at least no without wearing
protective glasses and having a fire extinguisher handy.
  Reply With Quote
Old 14th January 2004, 11:48 PM   #7
Duo is offline Duo  Canada
diyAudio Member
 
Duo's Avatar
 
Join Date: Jun 2002
Location: Victoria, BC, Canada
Send a message via ICQ to Duo
Well, this circuit is functional, just not as an amplifier.

We could say in the design specifications that it is a high speed, high current, single use latch. It will always remember its first state, and to reset the state, you simply replace the 741 opamp.


Sorry...
__________________
-- Duo, W1ngs, VA7MON, and lesser known handles. --
-- http://www.w1ngselectronics.com -- My Work and Projects --
  Reply With Quote
Old 14th January 2004, 11:58 PM   #8
diyAudio Member
 
Join Date: Sep 2002
Location: Sweden
Quote:
Originally posted by Duo
Well, this circuit is functional, just not as an amplifier.

We could say in the design specifications that it is a high speed, high current, single use latch. It will always remember its first state, and to reset the state, you simply replace the 741 opamp.


Sorry...
Not even that, I am afraid, since it is AC coupled. I may be wrong
though. I am a bit too tired to think clearly right now. It will
produce a pulse, though, depending on the polarity the initial
polarity of the input signal, ie. if the 741 will survive long enough
to do even that.
  Reply With Quote
Old 15th January 2004, 01:16 AM   #9
Duo is offline Duo  Canada
diyAudio Member
 
Duo's Avatar
 
Join Date: Jun 2002
Location: Victoria, BC, Canada
Send a message via ICQ to Duo
Yes, I wasn't paying attention to the cap output. It would just give you a nice big pulse as you apply power (same polarity each time as long as the op amp shorts out to the rail on it's output.)

__________________
-- Duo, W1ngs, VA7MON, and lesser known handles. --
-- http://www.w1ngselectronics.com -- My Work and Projects --
  Reply With Quote
Old 15th January 2004, 03:37 AM   #10
diyAudio Member
 
Join Date: Jan 2004
Location: Germany / Bavaria / Augsburg
I´m really not sure, whether this should just be a nice joke.

When ist April Fool´s Day in Brazil..... ? :lol:
  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
Invisus ultra super regulator peranders Power Supplies 69 22nd February 2011 11:40 AM
Super Leach power amplifier for sale supernet Swap Meet 0 4th February 2006 12:51 PM
Amplifier super smooth power sply ldanto Power Supplies 3 20th June 2005 03:28 PM
SSM2220, SSM2210 Ultra super low noise matched monolithic transistors pairs peranders Swap Meet 0 18th April 2002 07:58 AM


New To Site? Need Help?

All times are GMT. The time now is 02:55 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