Does anybody made QSC amplifier

[vytas]

Hello everybody,

I would like to know, did anybody make the QSC amlifier, is it easy, or have some problems.

 

[Jan Dupont]

Hello again Vytas 🙂
I have plans to make a "QSC-clone" in the near future 😉

 

[vytas]

Hello Jan

I'm interesting in it because I find one very interesting thing - The colectors of power transistors are grounded.
By the way I make new Lynx amp 🙂 and M250
The first was sold as soon as it was made.

 

[Jan Dupont]

I'm glad to hear that you continues with the LYNX amp 😉
I was thinking of using the QSC output stage in one of my next amps to collect some more experience with this circuit 😀

 

[synd120]

http://www.xfaudio.net/bbs/list.asp?boardid=15&page=1

 

[Jan Dupont]

Sorry but my Chinese are not so got anymore 😀

 

[synd120]

clone qsc ex4000
i not english

 

[Jan Dupont]

Anyone having the schematic ???

 

[HighTec]

Ex 4000

Hi ACD.

I have the schematic.Send me the details where I could send it you.I can't post it here coz It could violate the forum rules.By the way,I have some latest schematics from QSC,if you are interested.
Cheers. 🙂

 

[Jan Dupont]

Thanks HighTec

I'm very interested in the schematics 😉
My email is: jd@audio-circuit.dk
Thanks in advance!

 

[synd120]

hi acd
The series of qsc ex ma amplifiers and jbl MPX mpa Amplifier Series circurt are same.jbl schemics can be loaded from
http://www.jblproservice.com/navigation/pdf_nav_tech.html
Ferthermore,you can get the schemics from (peavey qsc dbx
bbe dod crown toa .......)or other thousands of schemics.
After all,we are all engineers, Chinese is not the problem,the key is to understand the schemics.(by the way,the above is translated by one of by friends.)
http://www.xfaudio.net/bbs/list.asp?boardid=15

 

[vytas]

Hello Synd120

Did you do this schematic? If so, are the any possibility to buy the PCB.

 

[Jan Dupont]

synd120:
I do understand the schematics, however I see NO schematics
surfing the different threads audioworld.cn ....
I see some small icons reprecenting a image not shown

Vytas:
The PCB-layout will be published on my website some time when ready, and perhaps if the interest is big enough I will have some spare PCB's made 😉

 

[Eva]

synd120 :

Could you provide more info on this amplifier?

http://www.xfaudio.net/bbs/dispbbs.asp?boardID=15&ID=4845&page=1

Even some detailed photos would be very appreciated since I'm very interested in PFC, SMPS, class G/H and amplifiers with 'inteligent' or 'servo' power supplies

I've been taking a look to the forum of the link but I don't speak chinese at all and most files appear to be missing

 

[synd120]

vytas
Though we have the PCB circuit board now, we can not sent it to you because of the long distance between us and ferthermore the circuit board I designed is non-commercial.If you need it now,I can e-mail the software of the PCB circuit board to you.
Some of the QSC's technical fundamental is similar with an English C-audio amp I have seen. But the circuit of the C-audio is more simple and it's timbre is better than QSC,so it is more available for DIY.If you need it ,I can e-mail the circuit board diagram to you(should open it by PROTEL).

 

[Jan Dupont]

Thanks synd120
I'm interested (hope that I can open it with Easy-PC )😉
Do you have the Gerber-files ????

 

[vytas]

Good morning ACD

My interest in PCB is big enough 🙂. But any way it very depends on price. If it will not be too difficult for you please let me know the conditions. Than you very much.

 

[Jan Dupont]

Good morning vytas

I know, however the price is very much depending on the no. of PCB's made 😉
Best offers are usually around 10 pcs., however I have proberly got a new source for "prototype" PCB's in very low quantities 😀

 

[vytas]

Nice bords Synd120,

If it will not be too difficult for you, please send it for me.

vytas@balticmaster.lt

 

[Jan Dupont]

synd120

Yes. Very nice 😉