Connecting Two amp to a transformer

[badboy6120]

Hi there

I have made two of this amp and I want to connect them to a transformer

230W / 400W Mosfet Amplifier

Is there any way so I can just use 1 transformer for both of them??(Like Stereo) 😕
I heard that because of its symmetrical supply I should use each one with a separate transformer????🙁🙁🙁

 

[gmphadte]

Symmetrical supply is used in most of the stereo amps and are invariably powered by one transformer. There is no difference in stereo and two amplifiers. Stereo is a two channel amplification of stereo recorded material and is always two amps electrically but are never called so.

You should see that you have enough VA rating for the transformer.

If you have to place these two amps far apart, then the issue is little different.

Gajanan Phadte

 

[Kiriakos]

Basically two separate transformers offering benefits by assisting stereophonic sound.
An instant overload of channel R will not affect channel L and vice-versa.
Where is your schematic about the power supply ?

 

[badboy6120]

thanks for your responses

the current power supply schematic is two of these with separate transformers
But since one of these transformers is powerful enough to handle the two amp
I'm considering to just use one transformer for both amps

An externally hosted image should be here but it was not working when we last tested it.

 

[badboy6120]

By the way
Can you help me for building a switching power supply for these amps
do you have any schematic for this purpose???

 

[Kiriakos]

I would help you making any switching power supply if you spent first 5000$ for test and measurement equipment so to become able to troubleshoot this thing.

 

[badboy6120]

Could you tell me what sort of equipment do I need???
Beside oscilloscope

 

[Kiriakos]

I think that our conversation got a wrong turn possibly because I caused that, I am here to offer a quick tip, and not to offer knowledge coming from schools and long term education.
My suggestion would be to study for a year the theory of switching power supply, and in time you will understand what tools you do need by your self.

 

[29285]

I am in the smps biz since about 20 years, and looking back I can say, that delivering a circuit diagram will not help a newbie to build his own smps. There is much more around that to be considered, specially safety issues.

There are things I will never put my hands on, simply because I know I am incompetent in many fields of life. For instance repairing any gas driven equipment...

A noob building offline smps is another variety😉

 

[rayma]

By the way
Can you help me for building a switching power supply for these amps
do you have any schematic for this purpose???

Not a good idea, unless you just buy a ready made commercial unit. These are very complex to design.

 

[Kiriakos]

There are things I will never put my hands on, simply because I know I am incompetent in many fields of life. For instance repairing any gas driven equipment...

A noob building offline smps is another variety😉

To be honest I did sensed that our friend here needs dramatically to cut down cost by removing the Iron core transformer from his equation.
smps is a world of pulses, IC's and capacitors with specific properties, inrush current calculations, and more in depth knowledge of electronics engineering is required.

It is best for him to follow the simple steps of which he has their basic understanding today.
No all projects comes out perfect by the first attempt, but if learning is not what you seek? The buy a commercial amplifier and enjoy the music.

 

[badboy6120]

Thank you for all your answers

I think that our conversation got a wrong turn possibly because I caused that, I am here to offer a quick tip, and not to offer knowledge coming from schools and long term education.
My suggestion would be to study for a year the theory of switching power supply, and in time you will understand what tools you do need by your self.

You're right
I have to study more about this field
But I just want to know my required equipment for designing such circuits, so I can buy them gradually untill then

 

[gmphadte]

An SMPS is the last thing you will know to design after learning to design all the different circuits. One critical design flaw and eveything will go into smoke. It should also stand to the test of the application and when audio is concerned, just any design may not sound good.

Gajanan Phadte

Edit: any design will definitely need an oscilloscope. To begin with, for initial learning, an 100MHz dual channel will be fine.

 

[badboy6120]

An SMPS is the last thing you will know to design after learning to design all the different circuits. One critical design flaw and eveything will go into smoke. It should also stand to the test of the application and when audio is concerned, just any design may not sound good.

Gajanan Phadte

Edit: any design will definitely need an oscilloscope. To begin with, for initial learning, an 100MHz dual channel will be fine

Thanks for your tip
I won't make one unless I now exactly how it works
beside when I obtain the knowledge, I do not have to start designing a 220v power supply
I can start with low voltage converter like 12 to 24 or so
Right??
And after couple of circuit like that I will go for 220 circuits

 

[badboy6120]

Do you guys have any book's name in mind for learning such circuits?

 

[gmphadte]

Read and search for PWM ics on IC manufacturers' site. You will get the basics

e.g.
ti.com

Gajanan Phadte

 

[KatieandDad]

High Power SMPS design is indeed an art and experience in this field is vital, many attempts by newbies will undoubtedly end in failure.

However, do not let that stop you delving into SMPS experimentation.

A simple place to start is with the TL494 or SG3525 datasheets. If you keep to trying to illuminate say a 240V lamp from a 12V battery you will learn how the basic concept works.

 

[badboy6120]

thank you guys for your help