Follow this excellent audio amplifier, designed by me based on the original layout so good and reputable Douglas Self.
The main changes and additions were based towards greater power, higher working voltage, adjustable gain, bootstrap option on and off, using more current components and some minor changes of values in order to work well with these changes.
Have a great gain, I suggest using a well-designed and well filtered power supply, especially if it is with common transformer.
follows:
Sorry, the images below are the guidelines in the Portuguese language, because they drew up especially for nosos national forum, but i guess you can understand:
IMPORTANT FACT ABOUT BIAS ADJUSTMENT:
BIAS ADJUSTMENT MUST BE PERFORMED AFTER THE CHOICE OF MODE OF OPERATION (BOOTSTRAP ON OR OFF), AND MUST BE redone AGAIN IF THE CHOICE OF OPERATION MODE IS CHANGED.
Below is a shield against the DC outputs, I used automotive relays because they are cheaper and bearing a larger chain:
Below is a rectifier plate with soft start built for those who want to make with conventional transformer. This system couples the capacitors until they've been previously loaded via load resistors:
Below are links to download the respective PCBs PFDs...
Complete amp:
https://mega.co.nz/#!mRZV0KhI!N2cQnUwLUK3nGqLudaFRfA5DaSBpAIVWrVvrBD6AFwY
Protector DC:
https://mega.co.nz/#!zUowlSCA!CZehRxETRFc7XJ4oCsXj1Q8n8CJXhmGjAx49uyZB6_I
Rectifying with softstart:
https://mega.co.nz/#!uZogmJaA!Aydvjy1sJKOIjma4PUscv1evev0DkARO0OCG1RQRRc0
Follows a video that demonstrates the immense sound quality of this amp here. I beg you not notice the mess on my desk, the power supply is improvised and inadequate:
Teste de médios / Agudos (Cindy Lauper) - Debunker - YouTube
Friends, please excuse my horrible English. Any questions, we are here ...
The main changes and additions were based towards greater power, higher working voltage, adjustable gain, bootstrap option on and off, using more current components and some minor changes of values in order to work well with these changes.
Have a great gain, I suggest using a well-designed and well filtered power supply, especially if it is with common transformer.
follows:
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.
Sorry, the images below are the guidelines in the Portuguese language, because they drew up especially for nosos national forum, but i guess you can understand:
An externally hosted image should be here but it was not working when we last tested it.
IMPORTANT FACT ABOUT BIAS ADJUSTMENT:
BIAS ADJUSTMENT MUST BE PERFORMED AFTER THE CHOICE OF MODE OF OPERATION (BOOTSTRAP ON OR OFF), AND MUST BE redone AGAIN IF THE CHOICE OF OPERATION MODE IS CHANGED.
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.
Below is a shield against the DC outputs, I used automotive relays because they are cheaper and bearing a larger chain:
An externally hosted image should be here but it was not working when we last tested it.
Below is a rectifier plate with soft start built for those who want to make with conventional transformer. This system couples the capacitors until they've been previously loaded via load resistors:
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.
Below are links to download the respective PCBs PFDs...
Complete amp:
https://mega.co.nz/#!mRZV0KhI!N2cQnUwLUK3nGqLudaFRfA5DaSBpAIVWrVvrBD6AFwY
Protector DC:
https://mega.co.nz/#!zUowlSCA!CZehRxETRFc7XJ4oCsXj1Q8n8CJXhmGjAx49uyZB6_I
Rectifying with softstart:
https://mega.co.nz/#!uZogmJaA!Aydvjy1sJKOIjma4PUscv1evev0DkARO0OCG1RQRRc0
Follows a video that demonstrates the immense sound quality of this amp here. I beg you not notice the mess on my desk, the power supply is improvised and inadequate:
Teste de médios / Agudos (Cindy Lauper) - Debunker - YouTube
Friends, please excuse my horrible English. Any questions, we are here ...
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Thanks for sharing.Nice and complete work!
Amplifiers based on common parts are in my interesting.
Best regards.
Thimios.
Amplifiers based on common parts are in my interesting.
Best regards.
Thimios.
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It looks like a great project but the alternative output transistors, 2SC5200/A1943, are nowhere near as capable on 70V rails as MJL21193/4.
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Take a look at the SOA graph in the datasheet, these do mean something - at just 50V the derated Ic is down to only 1 amp. Vce here it is up to around 120V.
So, what happens with 70V rails and a 4R load but no VI limiters? Phhtttttttt!!
AndrewT has shown on other threads that 4 pairs of 2SC5200/A1943 are only reliable for about 200W RMS 8R. It is normal in some forums to accept the claims of guys who seem to know what they are doing because few seem to understand engineering specifications but here, I think there are enough people who can calculate power limits from published data to realise what is possible and what is not. Even 4 pairs of MJL21193/4 is marginal at 500W 4R. 5 pairs with nominal 70V rails is proven reliable though.
Franky, I wouldn't suggest the Toshiba Hi-fi types for anything over 200W at any load impedance.
HTTP 301 This page has been moved
Take a look at the SOA graph in the datasheet, these do mean something - at just 50V the derated Ic is down to only 1 amp. Vce here it is up to around 120V.
So, what happens with 70V rails and a 4R load but no VI limiters? Phhtttttttt!!
AndrewT has shown on other threads that 4 pairs of 2SC5200/A1943 are only reliable for about 200W RMS 8R. It is normal in some forums to accept the claims of guys who seem to know what they are doing because few seem to understand engineering specifications but here, I think there are enough people who can calculate power limits from published data to realise what is possible and what is not. Even 4 pairs of MJL21193/4 is marginal at 500W 4R. 5 pairs with nominal 70V rails is proven reliable though.
Franky, I wouldn't suggest the Toshiba Hi-fi types for anything over 200W at any load impedance.
Good morning friends ...
In the video above test, the power supply is delivering about 72V simpetricos, and employees transistors are 2SC5200 / 2SA1943, however, ORIGINAL Toshiba.
Yes, I also recommend the MJL, no doubt, but the Toshiba endured physical tests for more than 2 continuous hours, they work in the limit of the manufacturer's safety with 70-70V supply.
What happens is that nowadays there are many fakes, a fact that hinders the complete reliability in own datasheets of components.
Who can ride with MJL, make, because you are ensuring that nothing will go wrong.
I am obliged to put the Toshiba as an option on the PCB that here in Brazil the MJL are hard to find and expensive, and as physically tested, and the video is out to prove who want to venture, do at your own risk .. .
Regards ...
If anyone wants to check the simulation before assembling follows (Multisim 13.0)
https://www.dropbox.com/s/bgu6f8j1n4qpn73/simula%C3%A7%C3%A3o4.ms13
Some components (capacitors of smaller value) with hidden values are close to the real, this is due to the fact that simulates the Multisim Component great, when in reality what encontrmos market requires minor changes, such as the miller capacitor.
https://www.dropbox.com/s/bgu6f8j1n4qpn73/simula%C3%A7%C3%A3o4.ms13
Some components (capacitors of smaller value) with hidden values are close to the real, this is due to the fact that simulates the Multisim Component great, when in reality what encontrmos market requires minor changes, such as the miller capacitor.
Why not improve upon this circuit ? Then you could truly call it your own.
As it is , it is just a copy of many DIYA projects that are years old.
Improvements could be .....
clipping behavior , higher current OPS , dual CCS (no "unbalanced current mirror" for offset) ... more refined compensation ( C'mon - 120pf for Cdom!).
TMC (2 cap)comp. is easy to implement and quite stable , as well.
OS
Good afternoon friend!
The circuit is there, is a modification of a released very old project, and also much modified by MANY ... All that is good and works well, certainly ends up being immortalized and adapted to the needs of each, to suit every taste ...
I'm just sharing a version they loved here in my region, but of course anyone can modify it to your liking, or, if not like, you can simply choose not to ride, or ignore ok ...
I shared why I like to share, my instinct is to help, transfer, do not keep me any kind of information, especially when it can be useful to someone.
The circuit works well pereitamente, and delivers plenty of power with great quality, just ask anyone who does not like that just ignore this topic, it is very simple to do, there are thousands of amps posted here, choose another and be happy!
Regards ...
Good afternoon friends!
This amp is not a copy of any other amp, but a design based on one of the best amps ever made, the blameless created by Dr. Douglas Self, which should be considered as a project reference and believe that any amp based on it will have good sound, and as a result should be similar, as is the case of amplifiers made by our friend Carlos, So it is not necessary charges or some sort of fight, we think that the more options there are good projects, the better for ourselves, each one should choose the design of your liking. We should be humble and respect other people also have the same capabilities or better than ours.
This amp is not a copy of any other amp, but a design based on one of the best amps ever made, the blameless created by Dr. Douglas Self, which should be considered as a project reference and believe that any amp based on it will have good sound, and as a result should be similar, as is the case of amplifiers made by our friend Carlos, So it is not necessary charges or some sort of fight, we think that the more options there are good projects, the better for ourselves, each one should choose the design of your liking. We should be humble and respect other people also have the same capabilities or better than ours.
1.)Just a hint or two .... using .1R Re will make for builders having to match
many outputs. .22R or .27R will make for a much easier build (thermally stable).
2.)The switch for bootstrap is a troublesome addition. With such a "generous"
output stage .. even a u/S of VAS interruption could make for trouble (smoke).
3.) flyback diodes on output , diodes on input ground lift will make for a
much safer amp.
And be honest about ratings .... this is at best- a 200W amp.
It will work , but not even close to D. Self's base design.
I would of helped you ... but - you know best. 🙄
OS
Who wants to venture to our humble and confusing language, are almost 50 pages of information, exchange of ideas:
http://www.eletronicasilveira.com/t4928-debunker-strong-x4-500wrms
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.
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.
As I said , the project is open ... Everyone can include changes they deem necessary , do not bother with it . I'm just sharing an amplifier that I personally enjoyed listening to many friends and loved assembled in our humble national forum were sold more than 50 PCBs in a short time , and none , so far caught fire or some type thing ...
As for his power is just a matter of MATH ... Using appropriate transistors , suitable sinks and correct power supply , but can 500W at 2 ohms , quietly and with low distortion , it was also tested .
I would emphasize that no one in this world can not be beat , everyone can make a good design , and many can improve even more! Your ideas are always welcome friend ... I especially will not apply them because of physical tests the final result was surprising, however , are open to anyone wishing to apply them !
We are all brothers , we live in constant learning , I do not know you , learn day by day ...
I know some have accused me , as happened up there , but that does not matter to me and does not bother me , so people do not accept others' intelligence, find themselves " magicians insurmountable ," but are unable to prepare their own PCBs .
Humility is essential for the coexistence between people , and should not , ever be replaced by arrogance ... I'm here to HELP , LEARN , collaborate and share .
Be at peace , I wish all the best to you !
Hugs !
ps:
Did you enjoy the space too much to say that I appreciate the work of APEX. I am a born admirer of amplifiers designed for him. This can indeed be considered a master in this art, it has an immense capacity to develop any type of amplifier, as well as their respective PCBs, which are beautiful and symmetrical!
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I will charge a fee for exposing photos of the plates I did rsrsrsrsr, u deserve it friend fought hard and really debunker is a quality amplifier, ess boostrap gave a brightened same layout and quality are even professional. Congratulations and success
I think the site is dedicated to audio projects should not take past heartbreak of things that happened and not criticize the person , but the project , we will talk bad about a project that tested because it is fair what good preaching justice if we do not live rightly . Money can send it to me because the author Renato project sedeu entire project for forum and I set out to make the plates with respect to the site and will not divulge contacts to whom you want to buy, I will know that yes cmeletronica2014@hotmail.com . glad we highly respect other countries and their projects think we all have the ability to do a good project, but really love Brazil and I'm not the cirticando own homeland .
Besides being a debunker otimo amplifier is a free project that everyone can ask questions and exchange ideas with us.
Debunker is 500W 2R with TDH 0.02 % and the plate for a low price .
Debunker is a pojeto which was tested by several people in Switching and Linear sources.
Friends would greatly criticized the project as well let Respetar the well-known site
Good morning friend Liliano !
Do not worry about this kind of comment ... I've been predicting this could happen , the success of some other troubles , has always been so and always will. Just find intriguing someone who does not even have the capacity to develop their own specific layouts criticize someone who does. The project is there, with video that proves the quality, layout made by me without the help of "third parties" with available simulation file photo mounts made , and over 50 plates sold by you , and until this time EVERYONE who purchased are happy with the result .
In short , no arguments against facts , the project is there, and is free for everyone to assemble, market, sell , profit , can do whatever they want ... Unlike some , I never mind with trifles of this kind .
I do not want to get profit. Electronics is a hobby for me , do not fight for it , do not argue with her, I do not accuse anyone for it.
Only an advice to those who criticize , they do better. But forming a complete, perform the entire project , without needing help from others ... Show a layout itself can be proud to do it from start to finish ...
Good mounts my friends !
Bootstrap ON:
Bootrstrap OFF:
Regards...
An externally hosted image should be here but it was not working when we last tested it.
Bootrstrap OFF:
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 evening friends!
Respect is something very beautiful in any language, for many people they think they know too, despise the work of others because they want all the attention to their own work, because his big ego needs it! Renato did a beautiful job with this amp and do not deserve to be treated with contempt and slander, ask the others a little more respect to my colleague and his work!
Hugs!
Naldo Santos.
Respect is something very beautiful in any language, for many people they think they know too, despise the work of others because they want all the attention to their own work, because his big ego needs it! Renato did a beautiful job with this amp and do not deserve to be treated with contempt and slander, ask the others a little more respect to my colleague and his work!
Hugs!
Naldo Santos.
If the friend Renato unfazed'm posting a video he did test Debunker.
This is a proof of its operation.
www.youtube.com/v/-SeJh9l_LUE
For those interested in Denunker card still did aminha first sale out of the country but already sold out 75 cards with him and his success not claim no surface occurred.
contact e-mail:
Cmeletronica2014@hotmail.com
This is a proof of its operation.
www.youtube.com/v/-SeJh9l_LUE
For those interested in Denunker card still did aminha first sale out of the country but already sold out 75 cards with him and his success not claim no surface occurred.
contact e-mail:
Cmeletronica2014@hotmail.com
Good morning friends ...
We are here for whatever you need ... If in my power will be glad to help!
Regards ...