500W PA amplifier with Limiter

[iiee3602]

GERIBESLIMI is Output
16V is the rating of 100uf Capacitor

 

[DAMANHURI]

Apex, I build from the B500 with the addition of a few transistors Final, please check whether the correct or there is an error. how many volts to power it work well? sorry my bad english.
regards. Damanhuri
https://docs.google.com/open?id=0B7BjJtgHFAFLRmNEWk1ieUZTY2lDTE5vejdLTEY2QQ
https://docs.google.com/viewer?pid=...687818c197b54ccca899&a=bi&pagenumber=1&w=2000

 

[apexaudio]

Apex, I build from the B500 with the addition of a few transistors Final, please check whether the correct or there is an error. how many volts to power it work well? sorry my bad english.
regards. Damanhuri
https://docs.google.com/open?id=0B7BjJtgHFAFLRmNEWk1ieUZTY2lDTE5vejdLTEY2QQ
https://docs.google.com/viewer?pid=...687818c197b54ccca899&a=bi&pagenumber=1&w=2000

Nice work but I have not time for check. Use +/-95 vdc maximum.
Regards

 

[aman khalsa]

Apex, I build from the B500 with the addition of a few transistors Final, please check whether the correct or there is an error. how many volts to power it work well? sorry my bad english.
regards. Damanhuri
https://docs.google.com/open?id=0B7BjJtgHFAFLRmNEWk1ieUZTY2lDTE5vejdLTEY2QQ
https://docs.google.com/viewer?pid=explorer&srcid=0B7BjJtgHFAFLRmNEWk1ieUZTY2lDTE5vejdLTEY2QQ&docid=5f29a13ce819b68a4a6d0d0009418d3d|b458afcd9923687818c197b54ccca899&a=bi&pagenumber=1&w=2000

very nice sir .. good job . good luck thank u

 

[DAMANHURI]

Thanks APEX and Aman.

 

[comasus]

Try compensate with 47pF base to colector on VAS tranzistors MJE340/350

Hi! Mile
I tried compensating with 47pF caps but didn't worked still the zobel resistor is getting warm

if amplifier is used continuously that is oscillating then are there any possibilities of weakening of output transistors that leads to poor sound quality and power??

 

[apexaudio]

Hi! Mile
I tried compensating with 47pF caps but didn't worked still the zobel resistor is getting warm

if amplifier is used continuously that is oscillating then are there any possibilities of weakening of output transistors that leads to poor sound quality and power??

I have problem with fake MJE340/350, you can replace them with 2SA1837/2SC4793 or similar for test

 

[comasus]

I have problem with fake MJE340/350, you can replace them with 2SA1837/2SC4793 or similar for test

Hi Mile

i have only used 2sa1837/2sc4793 instead of mje340/350

you can see my pictures

http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-184.html#post2809144

 

[apexaudio]

Hi Mile

i have only used 2sa1837/2sc4793 instead of mje340/350

you can see my pictures

http://www.diyaudio.com/forums/solid-state/164208-500w-pa-amplifier-limiter-184.html#post2809144

Replace NE5532 with TL072

 

[MATSAZILIN]

Good gesign. Damanhuri.

 

[DAMANHURI]

Good gesign. Damanhuri.

Thanks Sir Matsazilin

 

[vedmitraa]

Very nice P.c.b. Damanhuri.
could you send pdf files to me vedmitraa@gmail.com
warm regards
Vedmitra Sharma

 

[khalsa]

very nice pcb Damanhuri

 

[DAMANHURI]

Thanks Broe Khalsa.

 

[luisitoloco22]

B500 based on schematics of H900, but in AB class.
Power supply +/-90Vmax.

hello, first of all I take this opportunity to greet him from Argentina, and I would inquire about the function of the component that is marked as ldr, of course, thanks and sorry for the inconvenience

 

[taj1989]

Hi! I've built this amplifier with 5 pairs of transistors, without protection and limiter:

I tested it today from a +-30V regulated power supply. On the outpur I measured -30V, but the transistors aren't dead, fortunately I limited the current to 200mA on the supply. Can somebody help me what should I check on the circuit? Can this hapen because there isn't enough voltage on the opamp?
Thank you for your help!

 

[apexaudio]

For test with +/-30V rail voltage replace 4k7/2W with 1k/2W, and connect input gnd to psu gnd.

 

[luisitoloco22]

B500 based on schematics of H900, but in AB class.
Power supply +/-90Vmax.

hello people, I wanted to consult those who have assembled this amplifier function of the component that is marked with "LDR" from already thank you very much and greetings to all.

 

[JOHN BALI]

hello people, I wanted to consult those who have assembled this amplifier function of the component that is marked with "LDR" from already thank you very much and greetings to all.

Hi luisitoloco22,
that "LDR" use for limiter actually it is part of NSL32(LDR + LED), not used if you don't want to use limiter. You can use 1 resistor + 1 LED instead

 

[comasus]

@Mile

Hi! Mile

The HF instability problem was solved i dont know how it was happen

but need to increase treble response its not even like ax-14

please help me mile

Regards
Joel