500W PA amplifier with Limiter

[gantex]

the most imortant things is PCB

and dont forget the power supply is moat important for big amp..

 

[apexaudio]

Can I use the MJL4281A and MJL4302A as output transistors instead?

Yes and there is many other output transistors like MJW21195/MJW21196...

 

[lawbadman]

Yes and there is many other output transistors like MJW21195/MJW21196...

How many pairs of MJL4281A and MJL4302A should I use so that I can drive 2 ohms speakers?

 

[apexaudio]

How many pairs of MJL4281A and MJL4302A should I use so that I can drive 2 ohms speakers?

Use 4 pairs but with +/55V DC rail voltage.

 

[wendipassundan]

APEX audio B500 with signal,clip,power indicator.

I would like to thank mr Mile, this amp sounds very good.I also use a balance input with a separate regulator, the sound is clear.

thk.




regards,,, Arif Sumadireja Paris Van Java

 

[apexaudio]

I would like to thank mr Mile, this amp sounds very good.I also use a balance input with a separate regulator, the sound is clear.

thk.




regards,,, Arif Sumadireja Paris Van Java

Nice work,
Regards

 

[gantex]

I would like to thank mr Mile, this amp sounds very good.I also use a balance input with a separate regulator, the sound is clear.

thk.




regards,,, Arif Sumadireja Paris Van Java

nice b500 pcb color.

 

[gantex]

My b500 darlington version with sanken, great sound for my job over 3 month

 

[TeHaa]

yes it's true B600, I already fix. The PA is functioning properly, but a lot of components that I replace the transistor BC can not be used when using the PA transistor BC the negative rail will not work, continue to flow on out sp. after, transistors BC, I replace the use of type, 2N5401 & 5551 PA can work, there is another component, I, replace pada.resistor 3k3, I, replace the 680 and 560R resistors, I, replace. 150R and VR, I, ganti.1k. Nothing is left to the transistor MPSA42 & 92, I, using 2N5401 and 5551. sorry, english, my, not good. only, that's all I did on the B600

Dear nano nano
I want to ask you. Did you mean you changed bias resistor 3K3 with 680R and 560R in serial? And 150R with 1K resistor (without VR)? Can you share the measurement how much voltage bias did you get with that replacement?

 

[gantex]

Dear nano nano
I want to ask you. Did you mean you changed bias resistor 3K3 with 680R and 560R in serial? And 150R with 1K resistor (without VR)? Can you share the measurement how much voltage bias did you get with that replacement?

i think he mean 3k3 replace with 680, 560 with 150 and vr with 1k.

 

[TeHaa]

i think he mean 3k3 replace with 680, 560 with 150 and vr with 1k.

Thanks gantex

 

[gantex]

Thanks gantex

y'ur welcome..

 

[gantex]

anyone can tell me, how much input gain between b500 and bx500? because i want change to input balanced.

 

[Techpolice]

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

how can i get this into BTL?
i already tried the connection given but when i power on chanel 2 went damage.

 

[wendipassundan]

Pcb b500 scp,signal,clip,power indicator.

may be useful .. pcb B500 scp (signal, clip, power indicator) already tested ok ... thank Apex Audio ..

 

[apexaudio]

may be useful .. pcb B500 scp (signal, clip, power indicator) already tested ok ... thank Apex Audio ..

Nice work,
Regards

 

[vedmitraa]

Nice Mr. Wedipassundan,
will you please check marked, zener 5 volt??? and prot conection, both tag shorted
I am on facebook..https://www.facebook.com/vedmitraa

 

[thimios]

may be useful .. pcb B500 scp (signal, clip, power indicator) already tested ok ... thank Apex Audio ..

Nice work ,post black bottom side if possible

 

[wendipassundan]

bottom layout b500 scp REV VALUE ZENER. thank you.

Nice work ,post black bottom side if possible

 

[wendipassundan]

konektor..

Nice Mr. Wedipassundan,
will you please check marked, zener 5 volt??? and prot conection, both tag shorted
I am on facebook..https://www.facebook.com/vedmitraa

Such connectors which I mean...


thank sir..