500W PA amplifier with Limiter

[DAMANHURI]

B600 circuit not tested.

why not test??

 

[iiee3602]

Hello Apexaudio
greetings what the rail voltage of B600? Do you have a PCB design?

 

[iiee3602]

Hello Apexaudio
greetings what the rail voltage of B600? Do you an PCB design?

 

[gantex]

B600

B600 circuit not tested.

Why u not test this circuit Apex Audio ? what special this circuit
Hey.. I want to ask for B500, its normal for 4,7 ohm and 47nF is hot if not connected to speaker ? its that true? please give me some answer.

 

[apexaudio]

why not test??

PCB for prototype not finish

 

[gantex]

B600

PCB for prototype not finish

Ok. Thanks before Apex Audio. Thanks for sharing. i will keep learn.. and do my own.. great job..

 

[apexaudio]

Why u not test this circuit Apex Audio ? what special this circuit
Hey.. I want to ask for B500, its normal for 4,7 ohm and 47nF is hot if not connected to speaker ? its that true? please give me some answer.

This circuit (B600) have better low end response.
You have some osscilation if 4,7 ohm is hot.

 

[apexaudio]

For start B120

 

[DAMANHURI]

PCB for prototype not finish

I will try to make the PCB after the end of the year

 

[gantex]

This circuit (B600) have better low end response.
You have some osscilation if 4,7 ohm is hot.

thanks for ur answer sir, i never get some answer on my indo forum, so i join to this forum and i hope i get some answer here.

Ok sir mybe that right, but what can i do for my problem, i so confuse, if i connect the speaker, this not problem. can u give me some solution? For little info, i use darlington for this amp.

 

[AndrewT]

post2768:
is the b120 an inverting amplifier?

 

[apexaudio]

post2768:
is the b120 an inverting amplifier?

Yes it is, B600 use buffer inverter on amp input

 

[JOHN BALI]

Please check

why not test??

Hi Mr Daman, I try to design layout for this one. I can send you the .dip

B600 circuit not tested.

Hi Dear Sir Apex,
Thanks for sharing...
I'm building B500 right now & not finished yet...
but today I saw the new B600, so here we go

I try to make a layout for this B600, need some check for error
I attach the top & bottom too
PCB size 50 x 200mm
we need two jumpers here for Clip Led & OUT

Regards

 

[apexaudio]

Hi Mr Daman, I try to design layout for this one. I can send you the .dip


Hi Dear Sir Apex,
Thanks for sharing...
I'm building B500 right now & not finished yet...
but today I saw the new B600, so here we go

I try to make a layout for this B600, need some check for error
I attach the top & bottom too
PCB size 50 x 200mm
we need two jumpers here for Clip Led & OUT

Regards

Nice work, look like APEX
Regards

 

[gantex]

Can any help me my zobel rc problem without load ? So i remove it, because give dc out, but with load it normal, no dc out on output terminal. Any help please. I use darlington schem from this forum,. Help me.

 

[suryadi5417]

B600 circuit not tested.

another master piece from APEXaudio

 

[jaagut]

Can any help me my zobel rc problem without load ? So i remove it, because give dc out, but with load it normal, no dc out on output terminal. Any help please. I use darlington schem from this forum,. Help me.

capacitor in zobel might be leaking or have shorted... replace and check if it helps.

 

[gantex]

capacitor in zobel might be leaking or have shorted... replace and check if it helps.

as I suspected, but after I check everything is normal or due transistor pre drivers i put to main headsink make this trouble ? but with load everthing is fine.

 

[ANGELPRO]

thank you for apex audio, your free design my inspiration.
your design is the best.

 

[gantex]

With another Apex user i found this problem too. So, this not a big deal problem for me. I just remove the RC from zobel network. I dont know what effected cause while i remove it. But this what i need to prevent damage if i forget to connect my load.