Super Ultra Hi Power Amplifier

[PicancoNet]

Can anyone see my amplifier schema ????

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



Thanks

[Tube_Dude]

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!

[Upupa Epops]

Will be, but only a few about 1 microsecond .

[millwood]

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.

[john curl]

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.

[Christer]

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.

[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...

[Christer]

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.

[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.)

[Cybergent]

I´m really not sure, whether this should just be a nice joke.

When ist April Fool´s Day in Brazil..... ? :lol: