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View Full Version : Group Buy 2KW Class-H Amplifier



meanman64
02-06-2011, 11:20 PM
PCB of a 2KW Clas H amp with turn on delay, clip indicator short circuit
price 23US$ ex shipping fully tested



465466468469470467

terminaterx300
02-07-2011, 09:35 AM
more information and part list of this pcb pls

slshellas
02-07-2011, 11:01 AM
Dimensions and part list for this PCB pls

khalsa
02-07-2011, 05:59 PM
very very good amp

meanman64
02-07-2011, 08:43 PM
Dimensions and part list for this PCB pls
PCB is 37CM x 13CM

irvynejay
02-07-2011, 11:29 PM
PCB of a 2KW Clas H amp with turn on delay, clip indicator short circuit
price 23US$ ex shipping fully tested






23US$ only for pcb?

PCB dimension on inch 5.11811024"x14.5669291"

meanman64
02-07-2011, 11:39 PM
it's a PCB groupsbuy and one board is one channel so u need 2 of them that's 46US$ ex. shipping

silverprl1
02-08-2011, 01:35 PM
Is this the same amp from ******** Patrick? I think it is designed by the the same guy as the 1.5K amp, but I am not sure? Maybe his name is workhorse? or maybe someone called kanwar? Did you receive my PM?

silverprl1
02-08-2011, 01:37 PM
Are these actual readings or are they SPICE outputs?


PCB of a 2KW Clas H amp with turn on delay, clip indicator short circuit
price 23US$ ex shipping fully tested

meanman64
02-09-2011, 06:05 AM
those are actual Oscilliscope waves from amplifier at 2 R load
sine wave fed.And yes I've read it.

ravpreet420
02-14-2011, 03:48 AM
Plz sir send circuit schematic and power supply

mkubawat
02-14-2011, 05:23 AM
What is the power (watt) at 8ohm load & class H response with sub-woofer.

ravpreet420
02-14-2011, 06:26 AM
Plz sir send full schematic

What is the power (watt) at 8ohm load & class H response with sub-woofer.

AutoclassA
02-14-2011, 08:57 AM
Hello


@ ravpreet420

I will submit schematics very soon.

@ mkubawat

Power at 8 Ohms is around 700W, 4 Ohms 1000W , 2 Ohms 1700W


This amplifier has a very strong Mids / Highs response, and a clean sound.

Any questions, I am here

AutoclassA
02-14-2011, 09:03 AM
Is this the same amp from ******** Patrick? I think it is designed by the the same guy as the 1.5K amp, but I am not sure? Maybe his name is workhorse? or maybe someone called kanwar? Did you receive my PM?

Hi Silverp1


These are actual oscilliscope waves from amplifier, VERY CLEAN waves at 2 Ohms Load.

If you need more details, please ask, when I have some time I will put more pictures soon .

Either Its same Design.




Regards

AutoclassA
02-14-2011, 08:37 PM
Plz sir send circuit schematic and power supply


Here you go with the refrence schematics!

ravpreet420
02-15-2011, 03:56 AM
Thanks AutoclassA
If don't mind plz send all parts no. and transformer voltage
Again Thanks For cooperation

Corvett
02-21-2011, 10:30 AM
Now whats the status of this Amplifier?

I cant see any new results, or the Group Buy Closed?

JAKUB_G
02-21-2011, 11:30 AM
Output transistors? How about Sq wave at 20kHz? Slew rate?

AutoclassA
02-22-2011, 04:50 PM
Hello


Today got the amplifier from the workbench at home :D , I will post more pictures with more oscilliscope waves as requested, Soon


Thanks

mkubawat
02-23-2011, 04:03 PM
how is possible o/p 2kw with only 6 pair of transistors with single pcb ? please explain If don't mind.
Thanks

mkubawat
02-23-2011, 04:04 PM
What is size of heat sink

AutoclassA
02-23-2011, 04:55 PM
how is possible o/p 2kw with only 6 pair of transistors with single pcb ? please explain If don't mind.
Thanks

Yes 2000W is not a Joke, But I got 1800W @ 2 Ohms since my transformer is 40-0-40 x2

If you rais voltage to 55-0-55 x2 you will get 2KW for sure.

Whats the relation between single sidded PCB and 2KW?

12 Transistors are good for 1800W amplifier but HEAT also is a lot at 1800W, Heat sink is 37CM x12 CM *in my application*

Thanks :UP:

JAKUB_G
02-23-2011, 05:58 PM
And What about output stage? Can you tell me which transistors are there?

AutoclassA
02-23-2011, 07:34 PM
And What about output stage? Can you tell me which transistors are there?


@ Jakub_G, transistors used is 2SA1943 and 2SC5200, Also you can use other transistors like MJL21196, MJL21194, but compensation is required when you change output devices :cool:

JAKUB_G
02-24-2011, 01:24 AM
Just six pairs of output transistors for 2kW? That must be some kind of joke. If you use efficient transistors like MJL21195/96 six pairs is not enough too. Can you calculate the current which flows over one transistor in full power into 2 ohms? Output devices are surely out of SOA....

mkubawat
02-25-2011, 03:04 AM
@ Jakub_G
I also agree with you..............

silverprl1
02-25-2011, 10:35 AM
The 1800 Watts is impossible with a 40-0-40 toroid or even 50-0-50. This amp is H class. it requires at least +120 +80 -0- -80 -120 .... +high +low grnd -low -high

This amp also requires a control board and a pre-amp with housekeeping circuits and ALSO a Input board and Power Supply board

Minimum power 85-50-0-50-85 per board.

WITH dual high-low power you get enough current to increase output to at least 1.5K - but nothing matters without a control pcb AND pre-amp pcb

silverprl1
02-25-2011, 10:37 AM
@ Jakub_G, transistors used is 2SA1943 and 2SC5200, Also you can use other transistors like MJL21196, MJL21194, but compensation is required when you change output devices :cool:

This is opposite of required I think.

AutoclassA
02-25-2011, 02:48 PM
The 1800 Watts is impossible with a 40-0-40 toroid or even 50-0-50. This amp is H class. it requires at least +120 +80 -0- -80 -120 .... +high +low grnd -low -high

This amp also requires a control board and a pre-amp with housekeeping circuits and ALSO a Input board and Power Supply board

Minimum power 85-50-0-50-85 per board.

WITH dual high-low power you get enough current to increase output to at least 1.5K - but nothing matters without a control pcb AND pre-amp pcb

ooops, I am sorry I was talking not rectified, AC!!

I had 53V RMS at 2 Ohms from that transformer witch is

+120 -0- -120 +60 -0- -60

Also you are free to buy a PCB or not!

This is an amplifier for audio

Thanks

AutoclassA
02-27-2011, 07:45 AM
This is opposite of required I think.

You can make other designs made by some one called workhorse at ********,

And you will be happy with them for sure


I told you the results I had, and I will show some pictures soon.

Talking about control board and a pre-amp with housekeeping circuits, is useless, because amplifier works perfectly without them. since you gave no info what those circuits are any way


Please dont copy from others

silverprl1
02-28-2011, 11:51 AM
I do know what I am talking about. There is even IN YOUR PICTURE a place for connection to a display/control PCB. Without that connection there is no way to control the volume, receive clipping feedback, etc. I have a PCB for this design but since you have never posted the schematics, listed the parts, or given any information to complete it, there is no way to finish the control PCB. Power PCB and I/O are done and easy. But the pre-amp PCB with housekeeping on it also connects to the control/display PCB LABELED on the AMP PICTURE.

Connection should go .... Pre - Control - Amp .... with the amp also providing feedback to the display/control PCB.

There is no way to control the volume without the display/control PCB LISTED on the AMPLIFIER PCB.

That is not a question. That is a fact.

silverprl1
02-28-2011, 12:03 PM
I am copying no one. I am looking at your pictures. I see the results of the SPICE files.

YOU said that it is not finished AFTER you posted the SPICE pictures, so all of the results MUST be from SPICE.... Then you said you are almost finished... Now you say I can buy or not buy... But you still say the PCB is not printed or tested.

If it works, post the schematic with the parts listed. I can draw a schematic in 10 different programs and make a picture with lines and no parts. A schematic with no parts listed is useless. If you are selling this, great, then sell it. And to build it we will need a BOM, a schematic with all of the parts listed, and gerber files for the control/display board. I think you should also post the gerber files for the Pre-Amp PCB, because that is VERY important too. What voltages does the amplifier accept for signal? what is the voltage gain? what is the housekeeping circuit for non-output stage transistors coming from?

I can also make the same picture you posted in Altium 3D. It looks exactly like the one you posted. The SPICE graphs look exactly the same too.

I do not care if you make money from selling the AMP, I just don't understand why you don't post the files and information if you are selling the amp?



You can make other designs made by some one called workhorse at ********,

And you will be happy with them for sure


I told you the results I had, and I will show some pictures soon.

Talking about control board and a pre-amp with housekeeping circuits, is useless, because amplifier works perfectly without them. since you gave no info what those circuits are any way


Please dont copy from others

AutoclassA
02-28-2011, 01:09 PM
I am copying no one. I am looking at your pictures. I see the results of the SPICE files.

YOU said that it is not finished AFTER you posted the SPICE pictures, so all of the results MUST be from SPICE.... Then you said you are almost finished... Now you say I can buy or not buy... But you still say the PCB is not printed or tested.

If it works, post the schematic with the parts listed. I can draw a schematic in 10 different programs and make a picture with lines and no parts. A schematic with no parts listed is useless. If you are selling this, great, then sell it. And to build it we will need a BOM, a schematic with all of the parts listed, and gerber files for the control/display board. I think you should also post the gerber files for the Pre-Amp PCB, because that is VERY important too. What voltages does the amplifier accept for signal? what is the voltage gain? what is the housekeeping circuit for non-output stage transistors coming from?

I can also make the same picture you posted in Altium 3D. It looks exactly like the one you posted. The SPICE graphs look exactly the same too.

I do not care if you make money from selling the AMP, I just don't understand why you don't post the files and information if you are selling the amp?


I dont know that you are talking about the Display board, I am sorry


Also Posting those files will not be helpful without the right PCB design, Please I am making some living from this project

silverprl1
02-28-2011, 03:34 PM
I have no desire to print PCBs, and it is getting harder and harder to get toroids big enough for a large amp. I don't want a "Total DIY" - I want a DIY kit that I get the PCB and then I buy the parts and assemble. That is all. But, because I am an EE, I like to read and understand the circuits.

My biggest problem is getting the toroid. That is why I am here at the SMPS forum. It seems like it is getting too expensive to DIY for High Power... although it is still good for Hi-Fi.

I am frustrated with this project. I wanted to do it back in december or January - but after finding too many toroids for at least $200, it seems like I should just buy a QSC from our OEM account... even though that is not the fun way.

AutoclassA
02-28-2011, 05:33 PM
I have no desire to print PCBs, and it is getting harder and harder to get toroids big enough for a large amp. I don't want a "Total DIY" - I want a DIY kit that I get the PCB and then I buy the parts and assemble. That is all. But, because I am an EE, I like to read and understand the circuits.

My biggest problem is getting the toroid. That is why I am here at the SMPS forum. It seems like it is getting too expensive to DIY for High Power... although it is still good for Hi-Fi.

I am frustrated with this project. I wanted to do it back in december or January - but after finding too many toroids for at least $200, it seems like I should just buy a QSC from our OEM account... even though that is not the fun way.


Dont give up

PCBs are in the process now, I am making a patch, delivery from manufacturer is 20 days.

You can Make SMPS 1500W for this amplifier, at an acceptable cost, check ludo SMPS at forums

I will supply you with PCBs as soon as they get finished

Thank you for intrest!

AutoclassA
03-03-2011, 04:46 PM
More Pictures of Amplifier

AutoclassA
03-03-2011, 05:04 PM
More Oscilliscope waves

AutoclassA
03-08-2011, 09:27 AM
Hello.


PCBs for this Class-H amplifier is in process.


About 14 Days to deliver, and start shipping.

If I see good feed back from users, we make a new Group Buy!

All those who buy the PCBs, will get the parts list delivered to there Emails, Since I am not looking to see this design copied, I will try my best!

AutoclassA
04-03-2011, 07:52 PM
Have some problems with PCB manufacturer

Here is a picture of PCBs


I am sorry for the delay, but it looks will take more time that expected


833

digitel
05-08-2011, 05:55 PM
This amp IS VERY STRONG POWER

A square
05-09-2011, 07:36 AM
hello sir
i think u dont want to sale ur PCB,s....???

digitel
05-09-2011, 06:24 PM
Hello everybody 2kw amp is very ....powerfull .. full protection clear sound and very hevey punch

mkubawat
06-01-2011, 04:05 AM
when are you post full schematic & PCB layout with pcb silk.......................waiting
thanks

ravpreet420
06-15-2011, 01:17 PM
Plz sir post full schematic for all ,thanx

AutoclassA
07-02-2011, 07:41 AM
Hello everybody 2kw amp is very ....powerfull .. full protection clear sound and very hevey punch


@digitl

Thanks for sharing some pictures of the Class-H amplifier.:UP:

digitel
07-02-2011, 10:21 AM
Thanks AutoclassA This amp is very high power and very good speaker protection system in this amp THANKS

meanman64
07-14-2011, 05:47 PM
are there people still wanting boards?

A square
07-16-2011, 08:22 AM
yes...

if u want to sale......

mariano
07-18-2011, 12:56 PM
I want a board too. it is late?

AutoclassA
07-18-2011, 01:00 PM
I want a board too. it is late?


Nothing is too late, 10 day will start shipping PCBs.

one board wont worth it for you, you need 2 at least for stereo set.

mariano
07-19-2011, 01:43 PM
then i will need 4 pcb.

michelle
07-19-2011, 02:40 PM
hi AutoclassA
greetings interested in your 2kw pcb what will be price of pcb and shipping to india need 2 pcb as all parts are available in my place please kindly send price and
details of payment procedure hoping you will oblige
warm regards
michelle

irvynejay
07-20-2011, 07:33 AM
i need some information too shipment and PCB cost ship to Philippines.

2 PCB =$ +shipment
4 PCB =$ +shipment

what are the content of the package
Pls add more information about this amp
parts are easy to get?
recommended psu for the amp,,volts lv hv ,amperes needed in full load
2 r load= 2kw
4r load =?
8r load =?
is it capable for bridges mode?

AutoclassA
07-20-2011, 08:34 AM
i need some information too shipment and PCB cost ship to Philippines.

2 PCB =$ +shipment
4 PCB =$ +shipment

what are the content of the package
Pls add more information about this amp
parts are easy to get?
recommended psu for the amp,,volts lv hv ,amperes needed in full load
2 r load= 2kw
4r load =?
8r load =?
is it capable for bridges mode?

I have 24 PCBs of class-H amplifier left.

amplifier is 1800W at 2OHMs, ask michel about parts, I gave it to him once.

They are easy, Hope digitel will show more results of his amplifier also

ionu7z1992
09-15-2011, 02:14 PM
I need a price (including shipment) for 2 pcb's to Romania...
If is another Romanian who want to buy pcb's....we can make a bigger order...
Thank a lot...
PS:What is the approximative price (including resistors/capacitors/transistors) for one power module?
Sorry for my english...

mj777
11-23-2011, 09:31 AM
I have 24 PCBs of class-H amplifier left.

amplifier is 1800W at 2OHMs, ask michel about parts, I gave it to him once.

They are easy, Hope digitel will show more results of his amplifier also
Dear Auto,

Is there any available pcb at this moment?

regards,
mj777

AutoclassA
11-23-2011, 01:25 PM
Dear Auto,

Is there any available pcb at this moment?

regards,
mj777


Yes there are

ionu7z1992
11-24-2011, 09:27 PM
I have started a group buy in my country(Romania)...if present interests for this project you will have a bigger order...
You have a pm with more informations...
Thx...
Here romanian forum: http://elforum.ro/viewtopic.php?f=180&t=98168

mkubawat
11-25-2011, 01:59 PM
what is the price for 4 pcb's including shipping to India

Junie
11-28-2011, 06:36 PM
let me know as well if PCB's are still available, going to Dubai. Many thanks.

AutoclassA
11-28-2011, 06:53 PM
let me know as well if PCB's are still available, going to Dubai. Many thanks.

Hello

To be clear to all, I have 24 PCBs left, I need some one to buy them and sell them to the group.

The one who buy them all will get lower price.

I can ship them as soon as some one confirms this

Thanks

johnyh
12-20-2011, 03:30 AM
Hello
Do you have any of this PCBs ?
Thanks

mj777
03-16-2012, 12:30 PM
Hello Guys, I have just received the pcb's for this powerful amplifier, I'm planning to build it as soon as possible. Just want to inform anyone who is interested to build this amp, I have 18 pcb's extra. the cost is 24 dollars each board plus shipping, a minimum of two boards per order(stereo amp).
I attached the pictures of the boards for proof.

regards,
mj777

meanman64
03-16-2012, 12:39 PM
mj777,
I'll get back to you I had organized a groupsbuy at a dutch forum and I gonna ask if they are still interested in the boards.Persanly I want to take an option fot two boards if it's OK by you

mj777
03-16-2012, 12:48 PM
No problem Sir meanman64, I will reserve for you two boards if you are really interested, since this is a first come first serve basis because of a limited numbers of boards.
regards,
mj777

AutoclassA
03-16-2012, 09:32 PM
Hi mj777


I would like to remind all, that

This is a DIY project to learn building class-H Amplifier, and its not designed for commercial use, and you may notice that some circuits needs improvements in the amplifier.
But, the amplifier is fully working, only issue I noticed that a Specific 4N25 chip MUST be used in the CLIP circuit.

Thats the only issue out there, and the TURN on delay circuit may need to adjust some resistor value depends on transistors you are using.

All notes of construction, help, support, will ONLY be discussed here at (www.diysmps.com)

We are not going to discuss, or post ANY information's at (www.diyaudio.com) its just that simple.

Any one buy the PCBs will get COMPLETE support here and at any other forums except (www.diyaudio.com)

Schematics will be sent ONLY to those who buy the PCBs.



Thanks for all

mj777
03-16-2012, 10:16 PM
Well noted Sir AutoclassA.
Regards,

mj777

AutoclassA
03-16-2012, 10:19 PM
Well noted Sir AutoclassA.
Regards,

mj777


Thanks ;)


we welcome all members from diyaudio here, but I think diyaudio is not going be a good place for discussion.

khalsa
03-17-2012, 04:02 AM
i have some experience in this amp with sir microsim i am very happy

mj777
03-21-2012, 11:36 AM
I have started to populate the pcb and it really looks good. pictures attached

Junie
03-23-2012, 06:56 PM
here's what i've made so far, it's a long way to go.

http://i67.photobucket.com/albums/h318/jiviking/SANY0204800x600.jpg
http://i67.photobucket.com/albums/h318/jiviking/ClassH2kw.jpg

mariano
03-24-2012, 04:06 PM
I will try next month to buy the pcb.

Malmir
03-25-2012, 10:16 PM
Hello AutoclassA.
In Your "reference" pdf i guess there is something missing ?
Between D1 and QN1 there are 2 resistors, shouldn't the mid point be connected to Q12 and equal for negative part ?
Sincerely
Klavs.

mj777
03-26-2012, 05:04 AM
Hello AutoclassA.
In Your "reference" pdf i guess there is something missing ?
Between D1 and QN1 there are 2 resistors, shouldn't the mid point be connected to Q12 and equal for negative part ?
Sincerely
Klavs.
Dear Klavs,

Those are connected as what you have describe, you just can not see it clearly because the reference is in a black n white copy, but in the colored schematic with values it is connected.

regards,
mj777

mj777
04-22-2012, 10:02 PM
this is my slow progress in building the amp because of busy work schedule, output transistors and heat sink afterwards....

mj777
05-01-2012, 05:22 AM
I am now making some test on my completed amplifier, see pictures attached. it is really a good amp, sound is really clear and loud, giving a punchy bass and clear treble.

regards,

mj777

mj777
05-01-2012, 06:45 AM
The video of my testing:


http://www.youtube.com/watch?v=5eN6pbfsNm0&feature=youtu.be



regards,

mj777

meanman64
05-01-2012, 08:31 AM
The video of my testing:


http://www.youtube.com/watch?v=5eN6pbfsNm0&feature=youtu.be



regards,

mj777
Hi mj777,
Very nice test but your speaker can't cope the power.Like te sound ,nice strong bass and treble.
One question do you still have a set of boards for me?

mj777
05-01-2012, 11:12 AM
Thanks for the comment Sir Meanman64, definitely my speaker won't stand the power of this amplifier, a PA amplifier with a clear and detailed sound it's best for big speakers. Yes Sir I still have a pair of board for you if you want.

regards,
Marjohn

meanman64
05-01-2012, 04:09 PM
How much is it for 2 boards?How many boards do you've left?

mj777
05-02-2012, 02:16 PM
Dear Sir Meanman64 For two boards in your location it will be 24x2= 48 dollars plus 17 dollars for the shipment via registered mail, two boards weigh around 320 grams. I have still 14 boards available.

regards,
mj777

norazmi
05-27-2012, 01:52 PM
MJ777 can u give me part name for DCOM1 and DCOM2 diode, i`ve the board and almost complete the component, few part i need is VTL5C4 and those diode.

mj777
05-27-2012, 05:03 PM
MJ777 can u give me part name for DCOM1 and DCOM2 diode, i`ve the board and almost complete the component, few part i need is VTL5C4 and those diode.

Dear Sir Norazmi, you can use any to220 ultrafast diode rated 16 to 20 amperes ex. MUR1620CT/MUR1640CT, on my board I used BYV410-600 from NXP semiconductors.

regards,
mj777

norazmi
05-27-2012, 06:05 PM
ohh, Thanks for the replay MJ777. I`ll post the progress here until this amp finish.

one more can u take high quality picture with large size so i can refer to it, since this amp have many components so i need carefully mount it for the first time.

regards

mj777
05-27-2012, 06:57 PM
ohh, Thanks for the replay MJ777. I`ll post the progress here until this amp finish.

one more can u take high quality picture with large size so i can refer to it, since this amp have many components so i need carefully mount it for the first time.

regards

Sir send to me your email address to help you much better.

regards,
mj777

norazmi
05-27-2012, 08:34 PM
pm sent. check it out :D

mj777
05-28-2012, 06:49 PM
pm sent. check it out :D

Sir Norazmi did you received my emails? and please post progress here in our forum.

regards,
mj777

norazmi
05-28-2012, 09:37 PM
yup received, thanks. i`ll post progress here no problem :D

norazmi
06-11-2012, 05:11 PM
here is the photo progress for class-H amp, almost finish, maybe this week i can power it up, testing voltage will be dual +/-35 vdc. MJ777 please check your email and since i dont have 2SC3503 and 2SA1381 so i`ve change with MJE340 and MJE350, also MPSA13 i change with 2N5551. If u have any suggestion please tell me :D .

best regards,
Azmi.

MicrosiM
06-11-2012, 06:15 PM
Azmi

Those two transistors MUST be mounted on main heat sink, they heat alot, around 70C


Take that into account

norazmi
06-11-2012, 11:38 PM
Noted that, Thanks Microsim. Ill put seperate heatsink at top for it, its for testing :D .

michelle
06-11-2012, 11:48 PM
Hi Norazmi
greetings MPSA 13 is darlington transistor 2n5551 IS NOT check voltage ratings of both trs
warm regards
michelle

norazmi
06-12-2012, 06:14 AM
Hi Michelle, yep i know, the original schema use BC546 actually, and MPSA13 has been modified by MJ777. But as owner said this amp should work as schema, so i`ll give it a try and see. I`ll only test with small trafo about 50va +/-35 vdc for safety. So changing BC546 with 2N5551 should not have a problem there.

regards.

norazmi
06-13-2012, 05:39 AM
i`ve got dc offset 0.002vdc. testing voltage +68 / +34 / 0 / -34 / -68 VDC (Using ir2153 smps) with dual trafo configuration. All run smooth, no component overheat. I`ll test the sound today hmmm... wanna listen to class H amp how deep it can run. Later i`ll do with increase the supply voltage up to double +/- 45 so it will be +90 / +45 / 0 / -45 / -90. What do you think MJ777 and Microsim ? :D .

best regards,
Azmi.

norazmi
06-13-2012, 05:42 AM
I dont use MPSA13 and i use 2N5551 (originally BC546, so i do rotate 180 degree for 2N5551 pin exchange) but i believe BC546 will do, no trace cut it work like Microsim state at schematic.

norazmi
06-13-2012, 05:45 AM
For +/- 15 vdc i use shunt regulator using tip142 and tip147 with resistor and zener diode taken from +/- 34 supply at same PSU and it work nicely. Relay delay at start up about 4-5 secs. :D

MicrosiM
06-13-2012, 07:52 AM
i`ve got dc offset 0.002vdc. testing voltage +68 / +34 / 0 / -34 / -68 VDC (Using ir2153 smps) with dual trafo configuration. All run smooth, no component overheat. I`ll test the sound today hmmm... wanna listen to class H amp how deep it can run. Later i`ll do with increase the supply voltage up to double +/- 45 so it will be +90 / +45 / 0 / -45 / -90. What do you think MJ777 and Microsim ? :D .

best regards,
Azmi.

I am glad to hear that!

This is very powerful amplifier for live audio use. Hope you enjoy it

Thanks

mj777
06-13-2012, 10:51 AM
Its is very nice to hear that Sir Norazmi, you will enjoy this amp, currently i'm in the philippines for vacation that's why I'm really busy and haven't open my e-mail, but Sir microsim is there to help if you have encountered any problem.

regards,
mj777

norazmi
06-13-2012, 03:29 PM
Crystal clear sound, all work, protection, clipping, power on, thermal. This amp is really loud :D

norazmi
07-08-2012, 09:39 PM
i`have done mounting this amp into CPU casing. Second module i didnt make any pre-test upon finish all component because i`m very confident with this amp. First power up i just make little mistake by connecting +/- HV to +/- LV, hahahahaha, and i`ve protection power up signal when i see led power for +/- HV does not turn on. So i`ve check many time with component all is correct. After few power on and off, there is no fuse blown, at each power rail and at main supply. then few mins later i just check power supply connection and i found wrong connection between +/- HV and +/- LV. i just made error when connecting +/- LV with +/- 130 vdc and +/- HV with +/-65 vdc.

But there is no component burn or blown, even fuse all is fine. Then i correct it back for the power supply connection, and YEY!! amp is up and come with clear music and powefull, i`ll post the picture later here with full setup. I use 2.5 KVA trafo wind by myself which i keep it long time ago. I didnt use it before i dont have high power amp for it. Now i have 2kw class H amp which i think match for this 2.5 kva trafo :D .

To anyone who want high-end and powerfull amp should get this amp for stereo and its hard to burn this amp with fully working protection :D . Thanks to Microsim for the design and help from MJ777 for helping me. Full volume and play with hard bass almost no distortion at all :D

best regards,
Azmi.

MicrosiM
07-09-2012, 07:26 AM
Thanks Azmi.


This Amplifier is power full, I have some schematics for commercial class-T, but no time to test or build any

Junie
07-09-2012, 02:53 PM
Hi Azmi,

Big Grats to you.
I have this amp too but trafo is my problem. Can you help me wind my own trafo?
I have EI core lying around with the below measurement:

Center leg: 42mm
height: 126mm
Width: 84

I'm planning to make two trafo with 10A each but i don't know the following:

Primary turns
Secondary turns
Primary wire size
Secondary wire size

Any help will be highly appeciated. Thanks in advance.

BR,
Junie

norazmi
07-12-2012, 09:43 AM
Thanks Junie, I dont actually know how to wind linear trafo from zero, what i did is i have this trafo which already have 220-240 primary winding, i just need to wound myself for secondary. this trafo actually use for the step down 220 to 120. and for the primary it use awg17 for winding. so i use 8 x 2 17 awg for secondary and i spend almost 2kg of coil at secondary. When i push very high volume the main switch at my home will turn off and i think this trafo suck very big current which i need 3 phase for it :D .

norazmi
07-12-2012, 06:16 PM
Measured today output at full volume 62.0 vac. This amp has been powered at +130 +65 0 -65 -130 from 2.5kva linear trafo, caps bank 71v 6800 x 12, but i think caps bank still not enough... i`ll post full amp picture here soon. damn... i should get 1 more pair for this amp... hahahaha :D .

mj777
07-12-2012, 07:36 PM
Sir Azmi, It is really nice to hear that your are happy with this amp, right now even me is excited to finish my amp, I will use a 140-70-0-70-140 volts dc from 20 amperes secondary EI core transformer, the transformer itself weighs 27 kg thats why I think I will gonna use a rack mount cpu server case to put this amp all together. Congrats to your build,
best regards,
mj777

norazmi
07-12-2012, 08:02 PM
Thanks MJ, yeah big case for big amp is good. Its worth of build, i use cpu case cooler master its suitable for this amp and weight. I might think maybe need separate within power supply and amp. Maybe 2u rack?

bahattin01
07-24-2012, 11:52 PM
Would you please send a list of materials and PCB thank you. (2 KW.AMP.)

mj777
07-25-2012, 06:16 PM
Would you please send a list of materials and PCB thank you. (2 KW.AMP.)

Sir bahattin01, please enlighten me do you want to buy pcb's for the 2KW amp?

regards,
mj777

bahattin01
07-27-2012, 02:41 PM
Bu anfinin malzeme listesi ve pcb sini gönderir misiniz.Saygılar...

vorezky04
07-27-2012, 05:55 PM
Wah, Ternyata saya ketinggalan.

mj777
07-27-2012, 07:50 PM
Bu anfinin malzeme listesi ve pcb sini gönderir misiniz.Saygılar...

reply in english please so everybody can understand...

mj777
08-06-2012, 04:47 PM
the set up of my amp will look like this when I get my case, powered by a 20 amperes 100-50-0-50-100 transformer.:)

regards to all,
mj777

lavindoo
08-15-2012, 08:20 AM
for how many speakers? how to play ohm? :UP:

lavindoo
08-15-2012, 08:26 AM
ask permission .. What can I get the pcb layout in pdf format ....

mj777
08-16-2012, 06:13 AM
Sorry lavindoo there is no pdf format lay out for this amp, we have only pcb boards for sale if you want to build this amp

dudaindc
11-30-2012, 06:55 PM
the set up of my amp will look like this when I get my case, powered by a 20 amperes 100-50-0-50-100 transformer.:)

regards to all,
mj777

Wow - that is a big mamma! Nice amp mj777!

lavindoo
12-12-2012, 02:59 AM
information is able to power thanks in what ohm load? and how many inches? ...

mj777
12-13-2012, 02:59 PM
Hi lavindoo the information you need is in post # 14 by autoclassA.
regards,
mj777

evette
12-19-2012, 11:10 PM
Can I have that transformer for christmas. Evette

CobraNet
12-23-2012, 03:31 PM
Shipping cost?

who to contact?

mj777
12-27-2012, 07:20 PM
Hi cobranet, tell me your location so I can check shipping cost. The pcb is with me.

regards,
mj777

khalsa
01-01-2013, 05:01 AM
Happy new year to all

cynikalX
01-30-2013, 06:49 AM
are these still available? Any idea what a list of parts would cost (so one has an idea of total amount that would need to be spent).. even better if there's a recommended power supply (or a link to building a recommended one)

MicrosiM
01-31-2013, 05:17 AM
are these still available? Any idea what a list of parts would cost (so one has an idea of total amount that would need to be spent).. even better if there's a recommended power supply (or a link to building a recommended one)


will give u special price, 30US$ for 1 set ( 2 PCBs)

regards

mj777
01-31-2013, 02:11 PM
Yes Sir pcb's are available, cost of the parts depends on how you want to build the amp( normal parts or high end parts). parts list and schem will be given upon purchase of the boards.

regards,
mj777

cynikalX
02-02-2013, 07:57 PM
could you provide a ballpark figure of both end of the ranges.. e.g. what's the lowest likely cost and what's the high end likely cost please? How easy are the parts to find also? Didn't see mention on a recommended power supply (or is that part of the kit as well?)

I'm not new to electronics/soldering but far from an expert, so also wondering what the difficulty in assembling this kit would be.. thanks for making it available!

mj777
02-14-2013, 09:55 AM
Hi Sir cynikalX,

Here are the list of the parts u need, this will help you decide on the parts that you will use either high end or regular parts.

Regards,
mj777

P.S. Sorry for late reply really busy on my work.

lavindoo
03-28-2013, 04:26 PM
Mr ... how to know ir2117 work well ... I am building a class H amp volt dc step-up using ir2117 ... on the negative rail can not walk ...

khalsa
03-28-2013, 04:35 PM
pls show some photos

CobraNet
03-28-2013, 06:39 PM
Mr ... how to know ir2117 work well ... I am building a class H amp volt dc step-up using ir2117 ... on the negative rail can not walk ...

Buy the PCBs, and and the amplifier its cheaper :D

norazmi
03-31-2013, 12:12 PM
my power on switch at main supply melt with 2kva trafo, lol i think its draw huge current, also my friend horn tweeter dead :D

mj777
03-31-2013, 02:42 PM
after some time i manage to test my amp again, this time it is near to finish im going to fix it in a wooden case.:)

mj777
03-31-2013, 09:43 PM
some more pictures:)

MicrosiM
03-31-2013, 09:43 PM
Very nice build mj777 :UP::UP:

Corvett
03-31-2013, 10:50 PM
WOOOOW :afro:

VERY GOOD FRIENDO.

khalsa
04-01-2013, 04:16 AM
very nice work

martha78
04-03-2013, 07:47 AM
Nice n cool...

mj777
04-06-2013, 05:40 PM
very powerful amplifier, detailed clear sound, strong bass. I really like how it sounds.:adoration:
you will be happy how it sounds. Thanks to Microsim and Workhorse for a well design class H Amp.:w)
regards,
mj777

MicrosiM
04-06-2013, 07:54 PM
@mj777

very nice work indeed, I really like it

thanks for posting your hard work :UP:

mkubawat
04-07-2013, 07:36 AM
Any one sales this pcb in india.i need 4 PCB

mj777
04-07-2013, 10:59 AM
@mkubawat, i have PCBs for sale if you want, I can send it to you from Dubai.
regards,
mj777

mkubawat
04-08-2013, 08:24 AM
@mkubawat, i have PCBs for sale if you want, I can send it to you from Dubai.
regards,
mj777
Let me know price & shiping cost for 4 PCB

mj777
04-11-2013, 09:45 PM
Let me know price & shiping cost for 4 PCB

Hi mkubawat,

4 pcbs = 60U$ dollars plus 18 U$ dollars shipping(registered mail) = 78U$ dollars total.

let me know if your interested.

regards,
mj777

lavindoo
05-06-2013, 04:04 AM
3996 I build a step-up using ir2117 ... on the rail - can not work ... in corrections please thanks

meanman64
05-22-2013, 05:29 AM
MJ777,
What toroid could i use best for this amp? I mean voltage and VA

mj777
05-22-2013, 05:36 PM
MJ777,
What toroid could i use best for this amp? I mean voltage and VA

You can use 4 X 50 AC secondaries with 2000VA in total current toroid.
me I'm using in my amplifier 4000VA EI core.:D

ultra
05-22-2013, 06:41 PM
what if we want to load the amp with 1Ω load?
Do you think +/-50VDC and +/-100VDC is ok?

meanman64
05-23-2013, 05:24 AM
You can use 4 X 50 AC secondaries with 2000VA in total current toroid.
me I'm using in my amplifier 4000VA EI core.:D

Is this for one channel or two.

mj777
05-23-2013, 06:08 AM
Is this for one channel or two.

yes Sir minimum for two channel.

mj777
05-23-2013, 06:16 AM
what if we want to load the amp with 1Ω load?
Do you think +/-50VDC and +/-100VDC is ok?

Regarding your question Sir, I think we better ask microsim and kanwar since they are the designer of the circuit. but as what I read on this thread it was tested on a 2Ω load but not with 1Ω load.

regards,
mj777

MicrosiM
05-23-2013, 10:28 PM
what if we want to load the amp with 1Ω load?
Do you think +/-50VDC and +/-100VDC is ok?


Amplifier will not handle 1Ω Load.


Regards

ultra
05-25-2013, 03:23 PM
not even if i lower the supply rails?

MicrosiM
05-25-2013, 03:28 PM
not even if i lower the supply rails?

the amplifier will enter protection @ 1R, I don't know why you plan to use 1R load!

Regards

Sierra
05-29-2013, 04:11 PM
whats the point of not using it under 1 ohm load?

khalsa
06-05-2013, 05:13 PM
my endless amp ultra i use 2year at 2ohm load with mjl 21193 .94

ultra
06-05-2013, 05:44 PM
the amplifier will enter protection @ 1R, I don't know why you plan to use 1R load!

Regards

If you use four 4 ohm speakers in parallel, you get 1 ohm. This way each speaker gets around 500W.

I think of using MJL4302A and MJL4281A.

AndrewT
08-08-2013, 06:24 PM
An amplifier that can drive a 4ohms speaker should be able to drive a 2r0 test load and preferably drive a 1r3 test load without entering IV limiting, nor should the output voltage collapse into the test load resistances.

If this amplifier cannot drive less than 2r0 then it should be classed at >= 4ohms capable, not as 2ohms capable.

Malmir
01-26-2014, 02:58 AM
Ultra: You could do a multihannel 1kw or 500w instead of setting 4 speakers in parallel. I would never like more than 2 in parallel, as if that amp channel goes down, all speaker goes down, and i prefere some sound though lower powered to nothing at all.

ultra
01-28-2014, 11:38 PM
I dont support this wiring either.
I was interested in the capabilities of the amp.

ga_zander
02-06-2014, 07:09 PM
i would also like to build this amp. Any more pcb available?
i have 2pcs 700va 39-0-39 toroids. Would i be able to power it? if yes how much rms @ 4ohms. thanks

mj777
02-07-2014, 11:55 AM
Yes PCBs are available if your interested?

regards,

mj777

ga_zander
02-08-2014, 12:43 AM
How much plus shipping to toronto canada?

ga_zander
02-15-2014, 11:00 PM
Thanks mj777 for the email instructions. I am starting to put together the power supplies. What is the 2x18 vac for, also can you send the schematic?

mj777
02-17-2014, 01:16 PM
Hi Sir information for the 2X18 vac sent to your email.


Thanks mj777 for the email instructions. I am starting to put together the power supplies. What is the 2x18 vac for, also can you send the schematic?

ga_zander
02-17-2014, 01:46 PM
thanks got it

joseph r
08-04-2014, 09:53 AM
Hi I want to buy 2 pcb with shipping to switzerland. Let me know thanks

joseph r
09-16-2014, 10:23 AM
Hi finally got PCB from other member who didnt had time to build this amp.
Now buying components and did read that opto for clip must be of certain manufacturer. Wich one work in this design?
He also sent me all info he got trough email from MJ777 like pics of transistor orientation, BOM, display board schem, psu schem and mods like R43 , R39, Q14, Q16.
But is there any actual schematic with values?
And about QMOS1 and 2 on schematic is FDH3632 but on BOM is IRFP260 wich one is good? Why the change?
Also Q17 is BTL169 on schematic and MCR100-8 on BOM ? Why the change?

I would like to learn how this work so any info i aprecilove.
Thanks

MicrosiM
09-16-2014, 04:40 PM
Hi finally got PCB from other member who didnt had time to build this amp.
Now buying components and did read that opto for clip must be of certain manufacturer. Wich one work in this design?
He also sent me all info he got trough email from MJ777 like pics of transistor orientation, BOM, display board schem, psu schem and mods like R43 , R39, Q14, Q16.
But is there any actual schematic with values?
And about QMOS1 and 2 on schematic is FDH3632 but on BOM is IRFP260 wich one is good? Why the change?
Also Q17 is BTL169 on schematic and MCR100-8 on BOM ? Why the change?

I would like to learn how this work so any info i aprecilove.
Thanks


Hello


Answers:-


1- that opto for clip must be of certain manufacturer , YES, I cannot remember witch manufacturer, but that chip used to be WHITE plastic package.

2- There is no actual schematics with values printed on them, Sorry.

3- QMOS1, QMOS2 use IRFP260, they will work just perfect.

4- Q17 is a thyristor, so use any one and do some testings.

FYI, that project came as is, and MJ777 had full success into it, please send him PM, and he will replay.

But if you need anything, also I am here, so dont worry


Regards

Kanwar
09-17-2014, 05:10 AM
Hi Joseph,

I am the designer of that amp and friend of Microsim who owns the rights for this amp.

The opto coupler used should from Fairchild only.


Cheers,
Kanwar

For thyristor you can user MCR-100, 2N6565 or BT169

joseph r
09-17-2014, 06:19 AM
Hi Microsim, Hi Kanwar,

Thanks for prompt reply much apreciloved.
I will keep you updated as I go along with it.

mj777
09-17-2014, 01:37 PM
Hi Joseph, I'm sure you will like the sound of this amp and it is very powerful, just be sure about the orientation of the transistors and build the protection circuit first before anything else as per Microsim recommendation.

br,

mj777

joseph r
10-09-2014, 06:34 AM
This is what I have so far

I need to put drivers, heatsink, some chips and PSU.

I have a +-55/+-110V psu and +-15V aux supply . What would be a safe procedure to test this amp? What is the steady state current of output transistors ?
I have a big auto transformer so I could start at low voltage for HV and LV like how much?



4950

khalsa
10-11-2014, 03:52 PM
joseph r. very nice look .

MicrosiM
10-11-2014, 04:25 PM
This is what I have so far

I need to put drivers, heatsink, some chips and PSU.

I have a +-55/+-110V psu and +-15V aux supply . What would be a safe procedure to test this amp? What is the steady state current of output transistors ?
I have a big auto transformer so I could start at low voltage for HV and LV like how much?



4950


You could use +-30VDC connected to LV, forget about the HV for the testing stage, you should be able to hear clean sound.

Regards

joseph r
10-13-2014, 09:21 AM
Thanks will do that.

cyriltoledo
01-09-2015, 03:37 PM
hello to the owner of this amp .is this is still available? i love reading this thread..and the amplifier u have presented.. i like it..

cyriltoledo
01-09-2015, 03:38 PM
high quality power amps!!

mj777
01-10-2015, 06:10 AM
Yup boards still available

BR,
mj777

mrperform
01-12-2015, 12:06 AM
Yup boards still available

BR,
mj777

Hy, which is the price for one pcb?

mj777
01-12-2015, 04:04 PM
Hy, which is the price for one pcb?

Hi Sir, 15 U$ dollars each PCB plus shipping

Regards,
mj777

cyriltoledo
02-03-2015, 12:44 AM
hello mj777 may i ask if u can ship me ur pcb here in phillippines? and pcb plus the component of this amp because im doubt that some or the components are not available here in our place.thank you!!

mahesh776
03-08-2015, 12:59 PM
hello mj777 i am also interested to build this amp.i have read discussion.
how much for complete components and 2 pcbs. i am from india.

josshhua
05-01-2015, 11:26 PM
Hello,
Hereby my progress of the building of this monster amp !, it was quiet a challenge in the beginning but now it is going very well i must say.

josshhua
05-02-2015, 11:51 AM
Unfortunally, i can't post the image...the picture is uploaded but i cant attach it to my post..:|

MicrosiM
05-02-2015, 01:13 PM
Unfortunally, i can't post the image...the picture is uploaded but i cant attach it to my post..:|


Maybe you are attaching a file with the wrong extention?

While uploading, check the allowed extentions.

bigvalveman
08-15-2015, 08:57 PM
Hi,

Are pcb's for this amp still available ?

Thanks.....

sooraj
10-07-2015, 09:59 AM
Hello,
I would like to build this amp. Any more PCB available? How much for complete components and 2 PCBs (Without Heat sink). Do you have the assembled and tested PCBs ?

Rookiex
10-08-2015, 03:16 AM
Without Hclass heat sink hard to build this amp

sooraj
10-08-2015, 04:12 AM
OK................... How much it will cost ? (Stereo - Two assembled PCBs)

sooraj
10-09-2015, 06:44 AM
Anybody have two assembled PCBs ? Please let me know. My mail ID "soorajmangalakkal@gmail.com".

MicrosiM
10-09-2015, 08:58 AM
Anybody have two assembled PCBs ? Please let me know. My mail ID "soorajmangalakkal@gmail.com".

Try to contact _mj777_ here, and see if he have some PCBs

mj777
10-10-2015, 11:25 AM
Hi guys sorry for not responding to your queries for a long time I'm busy settling to a new environment here in Australia but I think I have still 2 or 3 pairs left of this PCBs if anyone needs it.
regards,
mj777

bigvalveman
10-11-2015, 09:51 PM
Could you please advise re availability and shipping of 2 off 2Kw pcbs to Queensland, Australia.

Thanks.....

sooraj
10-12-2015, 05:12 AM
Hello mj777 ............,
I am not so good in troubleshooting of electronic circuits. So I am requesting you the assembled and tested PCBs (Two nos). Do you have the same to give to me ?

mj777
10-14-2015, 12:46 PM
Sorry sooraj I dont have assembled one, and i have only 3 pairs left.

sooraj
10-15-2015, 06:56 AM
OK.......... I will try myself to assemble it. One more request, most of the components are not available in my location, can you give components along with the PCB ?

mj777
10-16-2015, 09:57 AM
Hi sooraj, where is your location?

OK.......... I will try myself to assemble it. One more request, most of the components are not available in my location, can you give components along with the PCB ?

sooraj
10-19-2015, 05:40 AM
Hello mj777,
I am from India (State : Kerala, City : Trivandrum) & One of my brothers living in US (Benton, Arkansas)

ravpreet420
06-23-2018, 01:49 AM
please anybody help me I am wanted to know what value of D13 in schematic print