900W H-class PA Amp with Limiter

[boss2009]

Hello.. Anyone had experience with R27 overheating?
Im hoping you can give some advice..


Thanks & regards

 

[boss2009]

please sea this data sheet

Hello Khalsa.. thanks for posting other configuration of MUR1620.
The package i have is different .. Please see post #3110.

Regards

 

[rohin]

Hello.. Anyone had experience with R27 overheating?
Im hoping you can give some advice..


Thanks & regards

if you are getting 0v dc on output then its ok. few other resistance are also heating.i don't know about r27 but in other post apex tell us that some resistance must be hot.

 

[boss2009]

if you are getting 0v dc on output then its ok. few other resistance are also heating.i don't know about r27 but in other post apex tell us that some resistance must be hot.

Thanks rohin... i found my mistake.. i forgot the most important one.. that is to put jumper on the output .. now one channel is ok.. im working with other channel. I got R21 R23 burn resistor.. then when checking other parts .. Q5 and Q4 and MJE15033 damage also.. im going to test again after ill replace the parts..

i just observed that when power is on. MJE15033 and MJE15032 immediately temp rise. Hope u can give suggestion..


Thanks & regards

 

[SYAHRUL]

H900 successful trials supply 120 60 ct.

 

[SYAHRUL]

thanks apex audio.
very good apex power amp

 

[apexaudio]

thanks apex audio.
very good apex power amp

Nice work, very professional.
Regards

 

[rohin]

Thanks rohin... i found my mistake.. i forgot the most important one.. that is to put jumper on the output .. now one channel is ok.. im working with other channel. I got R21 R23 burn resistor.. then when checking other parts .. Q5 and Q4 and MJE15033 damage also.. im going to test again after ill replace the parts..

i just observed that when power is on. MJE15033 and MJE15032 immediately temp rise. Hope u can give suggestion..


Thanks & regards

yes mje are hot but not so much.testing without heat sink is always risky.this is common problem for diy because we did all with our hand even pcb.pcb may short or open.wrong component fitting or forget something.in this case no one can help you.if your one channel is working that give some confidence to you to solve it.be brave and clear fault.best of luck.

 

[boss2009]

yes mje are hot but not so much.testing without heat sink is always risky.this is common problem for diy because we did all with our hand even pcb.pcb may short or open.wrong component fitting or forget something.in this case no one can help you.if your one channel is working that give some confidence to you to solve it.be brave and clear fault.best of luck.

Thanks rohin.. i tested last night the second board.. its now ok.. next test with signal at input will be done when i have already heat sinks..

Rohin.. do you have pcb for APEX B600 TEF.. if u have.. please send to my email add ( (y2kact@yahoo.com) tia

Thanks & regards

 

[Parag99]

i think you didn't get my point.negative side mean npn transistor and positive mean pnp side.fault is not in your bias fault is in mosfet circuit and ic circuit.heat sink and fan not a matter when so much heat come.because h class amp known as low heat amp if you get heat then its ab class amp.you are first guy who has face this probelm.its realy painful after hard work.

Will u give me right pcb becouse now I have doubt on my pcb

 

[rohin]

Will u give me right pcb becouse now I have doubt on my pcb

both pcb version are on 20 no. page posted by apex.v2 is for three pin diode.

 

[lamb]

Please Syahrul pcb APEX 1200 V3 PLEASE

 

[rohin]

my first project in 2015, vertax h 2500 with three stepper.my friend will make pcb for me.i request to apex sir please confirm that schematic of vertax is 100 % ok.if you give us little idea about pcb size and transistor placement then it will be great gift for diy of new year.

 

[Parag99]

Rohin I think input getting too high without nsl32 that's why amp runs at unlimited input
Becouse mill sir said Amp using high current and voltage at high signal level

 

[rohin]

Rohin I think input getting too high without nsl32 that's why amp runs at unlimited input
Becouse mill sir said Amp using high current and voltage at high signal level

i don't think so amp can work without nsl 32.nsl is for limiter.use one side led and another side 100k resistance.can you post some good picture.

 

[stewin]

merry CHRISTmass to you all

 

[Parag99]

Rohin I think tef will solve heating problem
Whts ur opinion

 

[rohin]

Rohin I think tef will solve heating problem
Whts ur opinion

you getting heat why don't know.can you tell me what speaker you connect to h900?i don't know about tef heat position.

 

[rohin]

happy new year to all.sir tell me please what is size of this logo for attach it on amplifier.

 

[Parag99]

you getting heat why don't know.can you tell me what speaker you connect to h900?i don't know about tef heat position.

I m using dual 15" p audio bm300