500W PA amplifier with Limiter - Page 2

apexaudio · 1st April 2010, 10:24 PM

Apex b500 pcb

apexaudio · 2nd April 2010, 10:01 AM

I am suprise there is no any comment of use OP amp in amplifier

sekhar · 2nd April 2010, 10:08 AM

sir i very much interested in making this amp looking at its apparent simple design can u plz forward the construction details my email address ardhendu.san@gmail.com ........... if u have any pics of the amp it would be very helpfull and how r the sonics??

regards
sekhar

powerflux · 2nd April 2010, 10:09 AM

Quote:

Originally Posted by apexaudio

I am suprise there is no any comment of use OP amp in amplifier

why? i can't see anything wrong with it.. 5532 is pretty standard in PA.
i just wonder what the 2n5401 at the output is for

audiomachines · 2nd April 2010, 10:17 AM

well it is a pro p.a amp. simple, working, lots of power, you provided all the details even the pcb layout, what more can we ask

but to thank you for sharing us your amp

apexaudio · 2nd April 2010, 10:18 AM

2N5401 is for VI cut-out protect.
Feedback circuit is important NE5532 can be replaced with another OP amp.

powerflux · 2nd April 2010, 10:26 AM

Quote:

Originally Posted by audiomachines

well it is a pro p.a amp. simple, working, lots of power, you provided all the details even the pcb layout, what more can we ask

but to thank you for sharing us your amp

well, the PSU and protection/turn on circuit?

apexaudio · 2nd April 2010, 10:26 AM

Quote:

Originally Posted by sekhar

sir i very much interested in making this amp looking at its apparent simple design can u plz forward the construction details my email address ardhendu.san@gmail.com ........... if u have any pics of the amp it would be very helpfull and how r the sonics??

regards
sekhar

My design can give you idea for your own project, I think that I give you to much information already.

apexaudio · 2nd April 2010, 10:33 AM

Quote:

Originally Posted by powerflux

well, the PSU and protection/turn on circuit?

PSU and Protect can find in my other threads.
Regards

powerflux · 2nd April 2010, 10:39 AM

Quote:

Originally Posted by apexaudio

PSU and Protect can find in my other threads.
Regards

i thought the H900 protection was suitable, but thanks for the confirmation

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2nd April 2010, 10:01 AM	#12
apexaudio diyAudio Member Join Date: Feb 2010 Location: Serbia	I am suprise there is no any comment of use OP amp in amplifier

2nd April 2010, 10:08 AM	#13
sekhar diyAudio Member Join Date: Jul 2009 Location: West bengal/siliguri	sir i very much interested in making this amp looking at its apparent simple design can u plz forward the construction details my email address ardhendu.san@gmail.com ........... if u have any pics of the amp it would be very helpfull and how r the sonics?? regards sekhar

2nd April 2010, 10:17 AM	#15
audiomachines diyAudio Member Join Date: Dec 2005 Location: silang, cavite	well it is a pro p.a amp. simple, working, lots of power, you provided all the details even the pcb layout, what more can we ask but to thank you for sharing us your amp

2nd April 2010, 10:18 AM	#16
apexaudio diyAudio Member Join Date: Feb 2010 Location: Serbia	2N5401 is for VI cut-out protect. Feedback circuit is important NE5532 can be replaced with another OP amp.