500W PA amplifier with Limiter

[marestiani]

H900 and B500 have inverted output phase for useing with B2181 and B181 subs. Speakers in B2181 and B181 are in reverted position for beter cooling.
If you use B2181 and B181 with another amps you must reverted (+) and (-) on speaker terminal or you can turn around speaker in standard position, also if you use H900 and B500 with another speakers you must reverted (+) and (-) on speakers terminals or amps output terminals.
Regards
Apex said this on h900 forum maybe it will you this

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thanks, my problem happen when i use my friend speaker, i thought the ne 5532 cause this, when i already finish change the ic he took the speaker home, never had a chance to try it again 😕, maybe its true the speaker is B2181 and B181, i never open it from speaker box

 

[gantex]

Thanks for all , i just fix it my self i just grounding my main headsink and my problem is gone, thanks..

 

[gantex]

Thanks for all , i just fix it my self i just grounding my main headsink and my problem is gone, thanks..

 

[eit]

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

my on going b500


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[boss2009]

Power supply board for B500TEF, PCB size 101x160mm

Hello ... Just like to post this edited power supply board for my B500TEF.

My Power supply:

Trafo - Toroid 50-0-50VAC at 20 amps
Capacitors - 10,000uf/63V 8pcs
filter caps at diode - needs suggestion for value
Bleeder resistor at output - need suggestion for value

Hope anyone can help me use proper values for missing parts.

Thanks & Regards

 

[boss2009]

Hello ... Just like to post this edited power supply board for my B500TEF.

My Power supply:

Trafo - Toroid 50-0-50VAC at 20 amps
Capacitors - 10,000uf/63V 8pcs
filter caps at diode - needs suggestion for value
Bleeder resistor at output - need suggestion for value

Hope anyone can help me use proper values for missing parts.

Thanks & Regards

Please check filter caps at ac side of diode.. I think this is wrong, any suggestion is welcome.. many thanks

 

[apexaudio]

Please check filter caps at ac side of diode.. I think this is wrong, any suggestion is welcome.. many thanks

You need 4x10nF/250V in parallel with diodes in bridge and 4x10k/2W in parallel with caps from midle point to rails.

 

[boss2009]

QUOTE=apexaudio;3728163]You need 4x10nF/250V in parallel with diodes in bridge and 4x10k/2W in parallel with caps from midle point to rails.[/QUOTE]

Hi Mr Mile.. many thanks for your quick reply.. Please see attached schematic I also edited based on your original for H900. Please see the resistor placement.. I put only 1 resistor each rail.. Is this ok ? or shall I series the two 10k 2w in each rail.

Many thanks & Regards

 

[apexaudio]

QUOTE=apexaudio;3728163]You need 4x10nF/250V in parallel with diodes in bridge and 4x10k/2W in parallel with caps from midle point to rails.

Hi Mr Mile.. many thanks for your quick reply.. Please see attached schematic I also edited based on your original for H900. Please see the resistor placement.. I put only 1 resistor each rail.. Is this ok ? or shall I series the two 10k 2w in each rail.

Many thanks & Regards[/QUOTE]

Connections mising.

 

[Vostro]

Isnt just easier to buy 2x 10000uf 100V caps instead of above caps.

Regards

 

[boss2009]

Hi Mr Mile.. many thanks for your quick reply.. Please see attached schematic I also edited based on your original for H900. Please see the resistor placement.. I put only 1 resistor each rail.. Is this ok ? or shall I series the two 10k 2w in each rail.

Many thanks & Regards

Connections mising.[/QUOTE]

Thanks you very much again Sir Mile for clarification..

Best Regards

 

[gantex]

What the best coice darlington or TEF ? of course with same specification, please help me, i want to built, but i confuse what best coice i need. Thanks

 

[AndrewT]

You should not be using 63Vdc capacitors with a 50Vac transformer !!!!

 

[khansa10]

asked sir, b 500 in the bridge is able to play how ohm speakers? thank you

 

[sandman15th]

asked sir, b 500 in the bridge is able to play how ohm speakers? thank you

hi khansa10, apex recomended 8 ohms on b500 bridge mode..😀

 

[TeHaa]

Thanks, here's the files.
Regards,

How the size of the PCB, sir?

 

[apexaudio]

B600

B600 circuit not tested.

 

[wiljj78]

B600 circuit not tested.

Nice, thanks for sharing.
Regards,

 

[andrewlebon]

Hello Apexaudio
greetings whats the best replacement transistors for BC550 BC560 i purchased some BC560 all were fake no continuity among any pins
warm regards
andrew lebon

 

[apexaudio]

Hello Apexaudio
greetings whats the best replacement transistors for BC550 BC560 i purchased some BC560 all were fake no continuity among any pins
warm regards
andrew lebon

BC547/557, BC546/556, BC549/559 or 2N3904/3906