500W PA amplifier with Limiter

[wattaniya]

Sample 4 Channel APEX B500 and use bridge mode future.

can u post high quality pictures of this amp.

 

[teslar]

teslar
good transformer how many kilogram?

Hi engel dela pena.

50 Kilogram up

Regard.

 

[teslar]

can u post high quality pictures of this amp.

Hi nazirdigi.

High quality pictures of this amp.

Regards.

 

[andrewlebon]

hi teslar
greetings NICE WORK
THANKING YOU
ANDREW LEBON

 

[wattaniya]

pls help.

here is my b500.
first powering up with fuses 53vdc,0,53vdc amp works fine.
i used 2sd669a instead mje340. it works fine .
after one hour i change mje350 to b649a. in near d669a 100ohm resistor burned and fuses blown.
after i remove d669 and 649 with mje340,350 but same problem fuses blown.
can any body help to solve this problem.

 

[wattaniya]

b500 help

this is the photo of the parts.

 

[teslar]

this is the photo of the parts.

Hi nazirdigi.
I think pre driver & Out put problem.
1.Teak out all power transister out put.
2.Replace all berned part.
3.Check DC power at attachment.

And surely all power transister out put no short to ground and heatshink.

Regards.

 

[idro]

Hi apexaudio
I plan to make 500 PA as Subwoofer car amplifiers, how do you think? thank you

 

[apexaudio]

Hi apexaudio
I plan to make 500 PA as Subwoofer car amplifiers, how do you think? thank you

Class H or class D is better for car amplifiers.

 

[eesbiboi]

my second b500 amp build for toktok mobile

regards
ees

 

[engel dela pena]

nazirdi
please double check this traces
i try to figure but i can only assume maybe i was wrong.

 

[wattaniya]

nazirdi
please double check this traces
i try to figure but i can only assume maybe i was wrong.

hi engel dela pen
i removed all power trans and checked 2 trans burned.
i checked the traces its fine.
may be b649 is fake i think.

 

[Mamak]

excelent

 

[yosie48f]

thank's Mr. Miles and Mr.Coolet

 

[wattaniya]

thank's Mr. Miles and Mr.Coolet

hey man is this h900 or b500? wrong thread.

 

[wattaniya]

hi apex sir .
i bought a new transformer for b500. after rectifies it gives 80.0.80vdc .can i use 2.2k resistor for r24,25 or i have to increase the value of resistors? any other changes.

 

[ariyanto]

This is recomended protect.

Sorry mr mile ... for the size of Protec pcb layout?
thanks

 

[apexaudio]

hi apex sir .
i bought a new transformer for b500. after rectifies it gives 80.0.80vdc .can i use 2.2k resistor for r24,25 or i have to increase the value of resistors? any other changes.

2k2/2W is OK for R24,25

 

[apexaudio]

Sorry mr mile ... for the size of Protec pcb layout?
thanks

80x75mm

 

[wattaniya]

apex sir thanks for ur reply.
without power transistors can i give dc 80v to check b500.
what are the main places to check the voltages.
dc offset below 100mv. is it ok?