900W H-class PA Amp with Limiter

[wattaniya]

hi apex sir,
pls help, the clipping led is burning very quickly, why is that.

 

[apexaudio]

hi apex sir,
pls help, the clipping led is burning very quickly, why is that.

Zener diode 15V must be connect to +110V instead +55V
Regards

 

[wattaniya]

thanks for the reply sir.

 

[jeciel]

Hi...im new in the site..just want to ask if I can request for apex h900 complete PCB layout and also the diagram?thanks alot!!

 

[jeciel]

APEX H900

hi im also interested on apex h900..is there an available speaker protector pcb layout?thanks

 

[suryadi5417]

hi im also interested on apex h900..is there an available speaker protector pcb layout?thanks

everything yuo needs are here, please be patience to read the thread from beginning....

 

[44250]

"Search" option

hi im also interested on apex h900..is there an available speaker protector pcb layout?thanks

Use "search" option at the upper right corner of this site,it will help you.

 

[wattaniya]

Zener diode 15V must be connect to +110V instead +55V
Regards

hi apex sir,i changed the ZD 15v connect to high rail, its working perfect, clipping at 60v ac on out. input 50hz sine wave.
thank you.

 

[Valenca]

Hi Apex, you would not have any good draft class D amplifier in your collection?

 

[DAMANHURI]

Help me, please...

Mr Mile.
my protect not working. just Change the type of Relay
http://sphotos-d.ak.fbcdn.net/hphotos-ak-snc6/251168_4637781788055_988846719_n.jpg

 

[44250]

Does the relay "click" or not? What voltage is on it´s coil?

 

[DAMANHURI]

Does the relay "click" or not? What voltage is on it´s coil?

Relay Not '' Click'' no reaction whatsover, relay coil I use 24VDC.
Can u Help Me ?

 

[44250]

check supply voltages,i'd do that first. i compared visualy your layout with APEX PA PROTECT layout and there are few diferences in component placing,so you changed it at few places. i'd also say that there is one 180k instead 100k resistor. why have you placed le-diode instead one 1n4148,that can also cause troubles? compare your layout with scheme and check voltages,you will find mistake,i'm sure!

 

[Hadighorbani]

hi ser apex
i try to creat H900
i use + -25 and + -50 VDC for test
it was worked wen i conect low voltage but when i conect Hi voltage the 100 ohm ressistor hase jenerate smoke
i linked a picture here

Download AP_Xaudio_20H900_20Component_20Layout.jpg

http://img4up.com/up2/08747272294675884912.jpg

please help creat that eror
thanks

 

[electra_ina]

Hi Hadi..please your upload picture your kit H900..top and bottom pcb

 

[Hadighorbani]

thanks

Hi Hadi..please your upload picture your kit H900..top and bottom pcb

ok
i do it tomaro

 

[Hadighorbani]

i was findout solution
i was use rong pcb and layout
thanks boys

 

[electra_ina]

i was findout solution
i was use rong pcb and layout
thanks boys

Congratulation...

 

[DAMANHURI]

Finish

http://sphotos-c.ak.fbcdn.net/hphotos-ak-ash4/407695_4880626299016_1734733296_n.jpg

finally finished also protect the speakers that I created using APEX design, thanks Mr.Mile has given a good component layout, I just change the model of the relay without any change. relay works fine. IC 7912 and R 5W 47R hot, is there a problem? beg the help sir.

 

[44250]

measure the voltage across that 5W 47R resistor and than calculate power disipated on it by the formula P=R x I^2. if the power calculated is larger than 2W than you should use 7W resistor.
power disipated by 7812 is also easy calculated by measuring voltage between in/out pinouts and multiplying it with current flowing through it. if the power calculated is smaller than suggested by manufacturer than just add a heatsink on it.
.
what voltage is at relay coil?
.
what is main supply voltage?