Amplifier HiFi NS450 - 200W - diyAudio
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Old 5th July 2013, 10:04 PM   #1
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Default Amplifier HiFi NS450 - 200W

Regards!

Here I am providing some information about this great amp, designed by friend Naldo Santos, which surprised me for its sound quality compared to other amplifiers bipolar gender, and also for its simplicity of construction!

It is a simple scheme, with parts already known to many here, but the big hit in the final quality occurred due to several days of tests, adjustments and changes made by friend Naldo Santos, to arrive at a level of sound spectacular both in average, bass and treble. The circuit is very calibrated, and below I'm posting a video I made of assemblies.

The source used was also designed by friend Naldo Santos, based on already established a circuit with IR2153, using a transformer EI33 EI35 or salvaged sources ATX PC.

The music used is a Portuguese version of the famous "Knockin 'On Heaven's Door" by Guns, voice Zé Ramalho. I chose this song because it has a range of excellent mids and treble, so he could show that a mosfet is rather able to reproduce those frequencies with the same intensity as bipolar, or even with advantage over them.


follows:

Click the image to open in full size.

Click the image to open in full size.


Video test:

http://www.youtube.com/v/mHCxRu7NKbQ

Demonstration of adjusting operating frequency of the switching power supply:

http://www.youtube.com/v/rcrKdByaG5I

If you are interested in assembling, warn that I post here the PDFs of printed circuit boards.

ps. Sorry for my horrible english.

Greetings,
Renato
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Old 5th July 2013, 10:45 PM   #2
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Default X-ray PCBs

X-ray PCBs:
Attached Files
File Type: pdf amp.pdf (48.3 KB, 443 views)
File Type: pdf supply.pdf (36.3 KB, 336 views)
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Old 5th July 2013, 10:59 PM   #3
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Very good amp, I had the pleasure of riding one of these and recommend.
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Old 6th July 2013, 01:17 AM   #4
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hello friends!
this amp is very simple and efficient and left you guys surprised at the quality he can play, just ride and enjoy!

Hugs!

Naldo Santos.
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Old 27th January 2014, 06:14 PM   #5
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hi all
brother can you upload the pcb please
thanks
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Old 27th January 2014, 06:40 PM   #6
Mihkus is offline Mihkus  Estonia
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Why theres output GND on that PCB?...
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Old 27th January 2014, 09:32 PM   #7
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Quote:
Originally Posted by samanflyer View Post
hi all
brother can you upload the pcb please
thanks




Sorry for failure ... In the first post I added just basic PDFs and forgot me of complete files, but now follows:




https://www.dropbox.com/s/vxpq9cbiatbop6h/NS450_AMP.rar

Do not be fooled by the simplicity of this project ... Was simply one of the best amps I have ever ridden, has a great sound ...
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Old 27th January 2014, 10:13 PM   #8
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Quote:
Originally Posted by Mihkus View Post
Why theres output GND on that PCB?...
The GND in output is only for the connection to the speaker could be performed with proper twin conductor, if you do not use this type of connector GND conductor this can simply be ignored.
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Old 28th January 2014, 01:34 AM   #9
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Default Power Supply PCB?

Hello Sir Renato,

This is an interesting amp to make. Just want to ask if you have the complete files or the PCB layout for the Power Supply. I hope you can share that too.

Thanks,
Neil
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Old 28th January 2014, 08:27 AM   #10
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Quote:
Originally Posted by blueice23 View Post
Hello Sir Renato,

This is an interesting amp to make. Just want to ask if you have the complete files or the PCB layout for the Power Supply. I hope you can share that too.

Thanks,
Neil
Yes friend, follows:

https://www.dropbox.com/s/js89jiwf6u...S450_FONTE.rar


If you have questions regarding the transformer, then I put the details ok ...
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