500W PA amplifier with Limiter - Page 39

apexaudio · 1st July 2010, 11:57 AM

Nice try, but for this power you need something like this,
Regards

mihailo · 1st July 2010, 12:02 PM

Found those pictures and schematics on net so I was curious does that work?
Regards

apexaudio · 1st July 2010, 12:11 PM

Quote:

Originally Posted by mihailo

Found those pictures and schematics on net so I was curious does that work?
Regards

Amplifier must be in use some time (years), and than you know is it good. Regards

kabanyag · 1st July 2010, 07:58 PM

Quote:

Originally Posted by mihailo

Schematics.
I resized this picture because it's to big,if you want better resolution I will send you by mail.
regards

Sir can you post pcb layout of this schematics?

mihailo · 1st July 2010, 10:12 PM

Here is link of site where I have find schematics:
Google Image Result for http://www.postimage.org/PqHZCES.jpg

engel dela pena · 2nd July 2010, 12:48 AM

apex,
your psu
behringer torroid x-former
does this have model as you order for your 100
500 & 900 module
or is it costumized?

electra_ina · 2nd July 2010, 01:43 AM

Quote:

Originally Posted by apexaudio

Dot is katode of LED inside NSL32, resistor is on oposite side,
Regards

Thanks Apex...I see it...so I think "dot/catode" on body NSL 32 must be same with "dot" code on PCB B500/H900. Catode NSL-32 connected with R 6K8/2W and negatif dioda zener 15V. Its OK?

Pozdrav.

mihailo · 8th July 2010, 11:13 AM

Hi Apex. I have 2 questions for you:
1.What voltage do you recommend me if there are two 2SC5200 and two 2SA1943 on pcb?
2.What power will I get with +/-56V?
Thanks
Regards

apexaudio · 8th July 2010, 01:29 PM

Quote:

Originally Posted by mihailo

Hi Apex. I have 2 questions for you:
1.What voltage do you recommend me if there are two 2SC5200 and two 2SA1943 on pcb?
2.What power will I get with +/-56V?
Thanks
Regards

1,2 - two pairs 2SA/2SC with +/-56V you will get about 120W/8R (resonable THD)
Regards

AndrewT · 8th July 2010, 01:56 PM

the 1943/5200 have a very poor SOAR at higher voltages.

Using +-56Vdc should give good 8ohm performance, but these devices can only manage 40 to 45degree phase angle when kept cool.

However, using +-50Vdc, an 8ohm load of 60degree phase angle can be driven to full power of ~110W. You still have to keep them cool to stay within the de-rated 100ms SOAR

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1st July 2010, 12:02 PM	#382
mihailo diyAudio Member Join Date: May 2010 Location: Serbia	Found those pictures and schematics on net so I was curious does that work? Regards

1st July 2010, 10:12 PM	#385
mihailo diyAudio Member Join Date: May 2010 Location: Serbia	Here is link of site where I have find schematics: Google Image Result for http://www.postimage.org/PqHZCES.jpg

2nd July 2010, 12:48 AM	#386
engel dela pena diyAudio Member Join Date: Oct 2005	apex, your psu behringer torroid x-former does this have model as you order for your 100 500 & 900 module or is it costumized?

8th July 2010, 11:13 AM	#388
mihailo diyAudio Member Join Date: May 2010 Location: Serbia	Hi Apex. I have 2 questions for you: 1.What voltage do you recommend me if there are two 2SC5200 and two 2SA1943 on pcb? 2.What power will I get with +/-56V? Thanks Regards

8th July 2010, 01:56 PM	#390
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	the 1943/5200 have a very poor SOAR at higher voltages. Using +-56Vdc should give good 8ohm performance, but these devices can only manage 40 to 45degree phase angle when kept cool. However, using +-50Vdc, an 8ohm load of 60degree phase angle can be driven to full power of ~110W. You still have to keep them cool to stay within the de-rated 100ms SOAR