500W PA amplifier with Limiter

[viki_v2]

Got it Sir, thanks a lot.
My psu has secondary 12-0-12 ac 500 ma will it work .
thank you.

 

[apexaudio]

Got it Sir, thanks a lot.
My psu has secondary 12-0-12 ac 500 ma will it work .
thank you.

No, you need 18-0-18v ac

 

[viki_v2]

Mile Sir ,I have just edited my post no1539 and attached the relay image pls check.

 

[viki_v2]

No, you need 18-0-18v ac

Ok I will get it- 500 ma is fine I suppose.

 

[apexaudio]

Relay for protect I have 24v 1ck, Shopkeeper told it is 16 amp and 1ck is one changeover is it fine to use.

Yes, relay it's OK

 

[viki_v2]

Yes, relay it's OK

Thank You.

 

[khalsa]

drowranger OK thanks

 

[QQ12e5k1]

You must build DC/DC inverter to get +/-55V from 12V, and any amp can be used as car amp.

do you have project of this inverter???
sorry if my question is out of topic but i have build b500 mono and i plan to make it as sub amps for car.

regards

 

[apexaudio]

do you have project of this inverter???
sorry if my question is out of topic but i have build b500 mono and i plan to make it as sub amps for car.

regards

No, but you can find lots of inverter projects, and most will be OK.

 

[QQ12e5k1]

No, but you can find lots of inverter projects, and most will be OK.

ok,i'll try to find it...
what amp of your project that most suitable for subwoofer and for the satellite speaker??

regards

 

[apexaudio]

ok,i'll try to find it...
what amp of your project that most suitable for subwoofer and for the satellite speaker??

regards

What is speakers specifitations?

 

[wattaniya]

hi apex sir,
to check can i use this regulated power supply with 56v ac,10a,after rectify 83vdc. any changes?

 

[apexaudio]

hi apex sir,
to check can i use this regulated power supply with 56v ac,10a,after rectify 83vdc. any changes?

Yes, you can use it without changes, just set +/-75V DC.

 

[A square]

hello sir apex now my fan is running on full speed at 60 digress .. i want full speed at 50 or less pls tell me what to do?

thank u ....

 

[QQ12e5k1]

What is speakers specifitations?

i use 150 watt subwoofer and 75 watt for the satelite.

regards

 

[apexaudio]

hello sir apex now my fan is running on full speed at 60 digress .. i want full speed at 50 or less pls tell me what to do?

thank u ....

Change resistor 470R with 510R in '60deg fan high speed' circuit.

 

[apexaudio]

i use 150 watt subwoofer and 75 watt for the satelite.

regards

I suggest: http://www.diyaudio.com/forums/solid-state/162081-dc-servo-mosfet-amplifier-24.html
Regards

 

[mihailo]

Hi, everyone.
I want to design and make amplifier that can push 3 speakers par channel. I used PA300 schematic to draw PCB, and add some more output transistors.
Apex, AndrewT and others who want too help, can you plaese look PCB and suggest me if there is something that I need to ADD,REMOVE or CHANGE VALUE before making PCB, so amplifier can work normal. Thanks.
Regards

 

[mihailo]

Note: JP1 and JP2 are connected with wire under PCB.
Regards

 

[wattaniya]

hi apex sir.
today i checked the amp with regulated power supply. i set to 75v dc. but no worth, same heat then i off the power.
so i set to 55v dc then in the power supply resistor 2.2k 1w getting very hot. so what is the solution?