500W PA amplifier with Limiter

[apexaudio]

Can somebody tell me is there any chance of using TO3 transistors for b500
i want to know THD values and slew rate of this amp

Use MJ15024 and MJ15025

 

[charlestpt]

Use MJ15024 and MJ15025

Thankyou
How about THD?
Did you the slew rate of this amp?

 

[alci2010]

Nice PCB

Greetings fellow DAMANHURI from Paraguay South America, I have a query, as called for softwar that uses this PCB. Thank you.

 

[cjschwarze]

Someone help,
I am new to amplifier building and I don't know where you purchase the b500 board.

Please Help,
cjschwarze

 

[Ian Finch]

Someone help, I am new to amplifier building and I don't know where you purchase the b500 board....

The meaning of DIY anything is to make it yourself. You have more than one drawing offered here to scale correctly and photocopy to photo-resist PCB material or use the toner transfer method with plain PCB laminate. Then you need to etch and drill the holes in your own board before fitting parts that you must also purchase.

This is a big amplifier and originally 2 boards at least. read following #8. The complete amplifier will be very expensive and dangerous to work on. If you are new to amplifier building and don't know how to do these things, you must learn with something easier and lower voltage first or ask someone who is successful if they will help you or sell you extra boards. Safety first, please.

 

[cjschwarze]

Thanks for the help, I know someone that can help me with this project.

Thanks,
cjschwarze

 

[DAMANHURI]

Greetings fellow DAMANHURI from Paraguay South America, I have a query, as called for softwar that uses this PCB. Thank you.

I use the component layout drawing Diptrace Ver 2.2, I hope you are not disappointed to see it. regards

 

[jofual]

Greetings fellow DAMANHURI from Paraguay South America, I have a query, as called for softwar that uses this PCB. Thank you.

Very nice pcb layout.... have anyone tested...?

 

[jofual]

I use the component layout drawing Diptrace Ver 2.2, I hope you are not disappointed to see it. regards

Do you have the bottom side Sir Damanhuri....? what size the pcb..?
What is the Tip 31 use for..?

 

[charlestpt]

How about THD?
Did you the slew rate of this amp?

 

[Maxmud]

Someone tell me the normal protection to the APEX. The standard defense of the APEX is bad! short-circuit in the load relay does not have time to work

 

[khalsa]

HI Maxmud

 

[masood]

i want two answer
one is what is slew rate?
second is how can i measure 10 micro fared to pico fared?and i have one styro flex type condenser on that is print as 10000 ,10% 250v?what is value ? thanks yours ever masood

 

[yehan]

hope this helps

Sir where can connect +MV -MV? Thanks

 

[masood]

Mr. Dilip Will you please elaborate what you mean by " Demo fail and " "tery again".First learn how to write and show something than only comment.This way dont show your ignorance.VedmitraSharma.

mr.vedmitra sharma namaskar,
my question is that how can you etch the board?by screen method or by toner transfer?anticipating for your answer?thanks with regard

 

[wattaniya]

b500 tef 8 pairs finished and tested.

 

[masood]

dear sir
how can i set bias by protecting mosfet.
thanks regards

 

[masood]

i have a styroflex type of capacitor indicated as 100000 , 5% , 250 volt how can i know the capacitor value in micro farad , kilo farad ,and nico farad thanks

 

[vorezky04]

have a schematic b500 TEF?
Help me..

 

[ibanezbass]

Facing problem with protect circuit

Hello APEX,
i finished your amp and i am really pleased with the sound.I get 45mv dc at the output.
My problem is that when i connect the output of the amplifier to the protect i get -78mv dc at the output and the protect circuit turns the speakers off.
All connections are ok i have checked many times.

Any help would be greatly appreciated.

Dear Regards