Hi renatoscp
I'll be following to see the progress of the switch mode supply.
This is something I have not made yet for my amplifiers.
But the price of 800-1000VA toroid are becoming insane prices in my country.
Regards
I'll be following to see the progress of the switch mode supply.
This is something I have not made yet for my amplifiers.
But the price of 800-1000VA toroid are becoming insane prices in my country.
Regards
You could try a switching PSU.. I do not have any experience with them in audio, yet. And I recently decided to have a go with that concept. Unfortunately it's still in shipping, so I have to wait. But I'm curious what Renato thinks of that subject...
Good afternoon Vostro ...
Conventional transformers also are expensive here, not counting the final weight depending on power ... sometimes use housing scrapped transformers and rewind sent at specific stores, but are the transformers blade "E" and "I" ...
Once the project is completed SMPS I post here with the greatest pleasure! I'm sure his friend Leandro also help in issues that may arise by chance ...
Thankful, a hug!
I love SMPS. Since I built my first definitely abandoned conventional transformers. The power of a SMPS is immense compared to transformers, and its lightness and low cost is really worth it. Some say that they produce transients that hinder the sound, but completely disagree. A SMPS requires less elaborate filter capacitors that one transformer can not produce a transient, and even produce some small transient, it would be in the range of 70kHz (audible to the ear homano), while the transients of conventional transformers amplify the range of 50Hz (or 60Hz here in Brazil), and are difficult to eradicate ...
Who ever set up a SMPS, suggest assemble this one:
https://www.dropbox.com/s/js89jiwf6u9o8ci/NS450_FONTE.rar
NS450 - FONTE CHAVEADA PARTE 1
NS450 - FONTE CHAVEADA PARTE 2
An externally hosted image should be here but it was not working when we last tested it.
It's simple, strong, able to deliver about 450W (10A branch of power at a voltage of 45V).
The circuit was designed and tested by a great friend of mine (Naldo Santos). I did the final layout of it, with the addition of the protection circuit for the IR2153 formed by the power transistor zener + + 100K resistor. This circuit can be discarded just not riding these components, and placing a jumper where are the collector and emitter MJE13007.
The ferrite transformer used is the EI33 or EI35, can be found inside burning sources ATX computer (scrap) and reused.
The primary consists of 40 turns of 22 AWG wire (only 1 wire), and the secondary consists of 12 + 12 turns of 19AWG wire (2 wires together in parallel).
This is a slightly more "sophisticated" version I prepared to meet my personal needs, it is more complete, has stabilized output for powering peripherals:
An externally hosted image should be here but it was not working when we last tested it.
If you want I can make the files available too, but I advise to mount the simplest version to those who have never set up a SMPS.
Enough ! OT posts, insulting posts, copyright images and accusations have been removed.
Anymore will see penalties handed out and possible closure of the thread.
Thanks Renato...
Sure 70khz is inaudible to our ears. But this frequency (70khz + harmonics) requires other capabilities of smoothing-caps, or am I wrong? Would it be a good idea to let the SMPS be followed by a LC filter to get rid of HF remainders in the supply?
Being used to the metric system, I usually have no clue when the AWG standard is used. Could you give me an indication of how many mm2 22AWG or 19AWG is?
PS: Mooly, thanks for your intervention...
Yes, but the need to use these RCs or not directly depends on the duty cycle of the switching. when using the IR2153 (and prefer precisely this reason), the duty cycle is caught in 50-50%, and the transients generated with this configuration are virtually nil, so CRs are unnecessary, contrary to what is observed when using switching to the other 494 or 3525, which have cycle settings depending on the desired tension ...
Below is a conversion table x AWG MM2:
An externally hosted image should be here but it was not working when we last tested it.
Mooly, thanks for intervention.
Regards...
hello.....where have you been?, smps are used in millions of cars around the world to power audio amplifiers....😱
I am talking about high end audio amplifiers AJT
the ones have wide bandwidth..not limited bandwidth amplifiers to use inside an anutomobile.
I perceive you are a moderator...so.... you have the power.... otherwise i would say something more to you.
Best regards,
Carlos
the ones have wide bandwidth..not limited bandwidth amplifiers to use inside an anutomobile.
I perceive you are a moderator...so.... you have the power.... otherwise i would say something more to you.
Best regards,
Carlos
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now you talk about high end amps, why did you not say so in the beginning?...
are amps that go to make boom, boom, boom against the rules? what if people like them?
i listen to your youtube clips and your amp also go boom boom, boom, is that bad?
what's between you and renatoscp anyway that you have to follow him around?
are amps that go to make boom, boom, boom against the rules? what if people like them?
i listen to your youtube clips and your amp also go boom boom, boom, is that bad?
what's between you and renatoscp anyway that you have to follow him around?
I see you love me a lot
Your comment about my comment show a lot of respect on me.
I do not deserve..but thank you by your offer.
regards,
Carlos
Your comment about my comment show a lot of respect on me.
I do not deserve..but thank you by your offer.
regards,
Carlos
As long as RFI is well shielded and the high frequency and its higher harmonics filtered well enough, I guess there is no problem in using SMPS in audio and HiFi..
I know... a lot of commercial products using smps are crap from a Hi-End point of view and not even reaching the level of the average DIY product.
Besides, I think it's a bit unfair judging Renato's test setup (putting out some 570Watts) as if it were a finished product.. it is clearly still in a development phase and the objective of the test was to explore the limits while not cliping..
I know... a lot of commercial products using smps are crap from a Hi-End point of view and not even reaching the level of the average DIY product.
Besides, I think it's a bit unfair judging Renato's test setup (putting out some 570Watts) as if it were a finished product.. it is clearly still in a development phase and the objective of the test was to explore the limits while not cliping..
Vostro, good afternoon!
I found these images illustrate where you can find the EI33 transformer used in SMPS I posted the links:
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
In scrap supply ATX 400W PC real up you can easily find , and are free ... Remove the transformer plate and leave it for about 2 days immersed in strong thinner or benzine, and the glue will discard thus you can reuse the spool and ferrites with ease !
If there is any doubt in making the new transformer can humbly help any way I am able ok ...
Ps. - To try to maintain order , not here with me I will link the user Destroyer X or any other user to his service with provocative questions without any need to answer.
Who wants to ride the SMPS and want help in their assembly , count me and the friend Naldo who designed based on the datasheet itself in 2153 and made the necessary adjustments , we will be glad to help!
If you want to gather more information about the project , please access the links of the forum I mentioned above, all are very welcome , in any language , are more than 100 pages of information and exchange of ideas related to this project . The content is in Portuguese , but can be post in any language that respond with pleasure.
Greetings to all !
Well, I speak Portugese so don't need it, but google translator (or Bing, Promt, etc.) work reasonably well for technical stuff.
Some "Tarzan like" awkward gramatics but since schematics are universal, text accompanying or explaining them is easy to guess.
Some "Tarzan like" awkward gramatics but since schematics are universal, text accompanying or explaining them is easy to guess.
Good afternoon friends!
I would leave all the important information:
Any project that I post in this forum, including this amplifier design is free. You can do what ever they want it, they can enjoy at home or even sell, make a profit, I do not care. Can change, they can do whatever they want it! The internet is a free (for now lol) environment. My designs and layouts not copyrighted, are open! Do not depend on electronics to survive, I have to machine only as a diversion, which I always found good friends and good reasons to continue!
A great week to all!
Soon I'll be posting a very cool layout, a stereo module for use with MP3 player Chinese:
It is a compact PCB with embedded SMPS using 2 TDA7294 with independent stabilized for feeding the MP3 module and cooler outputs of ICs output ... missing yet make some adjustments, after all tested the files I post .
I'm still finishing the layout of the source of debunker (tests in the video posted above) ... Once finished I provide also ok!
Regards!
I would leave all the important information:
Any project that I post in this forum, including this amplifier design is free. You can do what ever they want it, they can enjoy at home or even sell, make a profit, I do not care. Can change, they can do whatever they want it! The internet is a free (for now lol) environment. My designs and layouts not copyrighted, are open! Do not depend on electronics to survive, I have to machine only as a diversion, which I always found good friends and good reasons to continue!
A great week to all!
Soon I'll be posting a very cool layout, a stereo module for use with MP3 player Chinese:
It is a compact PCB with embedded SMPS using 2 TDA7294 with independent stabilized for feeding the MP3 module and cooler outputs of ICs output ... missing yet make some adjustments, after all tested the files I post .
I'm still finishing the layout of the source of debunker (tests in the video posted above) ... Once finished I provide also ok!
Regards!
Hi, hello
I read your force this TDA7294 integrated circuit board version, appreciate and look forward to more of your test circuit, and it is a very good improvement, so thank you for the good circuit board layout, very good!
Thank&Regards!
SengChuayr
Form china
Some photos of Mount Isaias friend:
Regards!!
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Regards!!
Good morning friends ...
Once the tests are made, I'll post more details and complete files on final cut ok ... I'm still waiting for some components ...
regards