900W H-class PA Amp with Limiter

[stewin]

by the way does any body have lm311 controller schematics??

diysmps

 

[stewin]

Step driver with TL072 can't be use for 3 step class H driver,
Regards

waso has designed a tl074 3steps class h


http://www.diyaudio.com/forums/solid-state/254656-900w-class-h-power-amplifier-12.html#post4946539

diysmps

 

[stewin]

Exactly,

But tell the procedure to the guys who don't even have an oscilloscope, all they have is a multimeter.

A simple solution:

Feed a 50-100hz sine at input and measure the voltage at output with your DMM and see its more than Low rail voltage and touching the high rail voltage or near to it. Its just an approximation of its working.

Thanks kanwar very useful information right there .

 

[stewin]

waso has designed a tl074 3steps class h


http://www.diyaudio.com/forums/solid-state/254656-900w-class-h-power-amplifier-12.html#post4946539

diysmps

hi all still continuing with the 2step and 3step pcb but i have the below smd package opamps.
will they work in the step stage with this opamp ic 4550, cct8002 , 4558

 

[sajti]

Use the opamp, which was planned by the designer. Slew rate is very important factor in this application.

Sajti

 

[stewin]

o.k thanks sajti for reply

 

[rizqi]

hi mr.rizqi

can you tell me, how do you drawing part symbol on top side pcb

look private messege send

 

[moore4889]

hi Guys,sir apex, working on this apex h900 tef,,,amp section is ok now,,,but have a problem in dc protect even applied with 3vdc in output...over heat protect and fan speed is working...did anyone encounter this problem regarding on the dc protect ckt??can i ask for some test point on this protection circuit that is working already?Thank you!!Regards

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[Dacz]

H900 Step Drive

Hi Apex, what is the minimum current to drive your step drive?

Thanks,
Dacs

 

[pallab]

I need h900 standard pcb (mirror)in pdf in A4 size.can anyone post it..??

 

[iiee3602]

Please read the whole thread. all pdf posted is tested.

 

[anand555]

i have some pieces of IR2117, if any body want to buy so, contact me its cost is INR230.00

contact me gunjaudio@gmail.com

 

[LIEM POO]

Good Morning all my friends..........

 

[LIEM POO]

hello, good morning all my friends........

 

[stewin]

hi liem poo welcome to class h

 

[jose1985]

pregunta

hola grupo soy nuevo y quiero agradecer a todos por aceptarme
estoy armando el amplificador apex h900 pero tengo inconvenientes con el diodo bav 21 ¿puedo remplazarlo por un diodo 1n4936?

 

[gpapag]

Hi Jose.
Please post in English.
This is one of our forum rules

diyAudio Rules

George

 

[jose1985]

yes

 

[jose1985]

http://www.diyaudio.com/forums/attachment.php?attachmentid=638589&stc=1&d=1507124043

 

[jose1985]

this is my project please help to correct any errors