500W PA amplifier with Limiter

[wiljj78]

sir willy pls. check if these is correct..thanks..

Please note the following.

1. Capacitor mark in green 47nF is mistake, you must use 470pF or 471 notification.
2. Don't forget red Jumper wire.
3. Connect Input GND to PSU GND.
4. Check DC out before connect the speaker (you should get 4-6mV).

Good luck...
Regards,

 

[desertstorm]

B500 TEF

Thank you so much WILLY..I follow your instructions sir...God Bless...

 

[desertstorm]

B500 TEF

SIR. WIL. BOTTOM VIEW OF MY PROJECT B500 TEF pls check if im mistake. thank you sir..

 

[Junie]

Sir, meaning?? pls. sir i want to know what is your comments thank you sir. and god bless...

Read the forum rules Parekoy: http://www.diyaudio.com/forums/site-announcements/167561-diyaudio-rules.html

Welcome to diyaudio kabayan.

 

[desertstorm]

thanks for your advice kabayan god bless..

 

[desertstorm]

Read the forum rules Parekoy: http://www.diyaudio.com/forums/site-announcements/167561-diyaudio-rules.html

Welcome to diyaudio kabayan.

sir, thank you.. sir can i have your pon. no pls. you also here in dubai

thank you so much sir.

 

[Junie]

PM Sent.

 

[wiljj78]

SIR. WIL. BOTTOM VIEW OF MY PROJECT B500 TEF pls check if im mistake. thank you sir..

You need to ensure caps value are correct and make sure no open tracks.

 

[jaagut]

I usualy make central ground on psu pcb, but gnd connect to case near input terminals not from psu, from psu gnd to case connect 100nF cond.

Hi Apex, based on above quote, is below grounding correct?

 

[AndrewT]

Don't confuse Safety Earth with Signal Returns and Power Zero Volts.

The Safety Earth runs from power input socket to Chassis.

The PSU Zero Volts runs to the Main Audio Ground.
The RCA input socket has a Signal Return. This Signal Return MUST connect the Source to the amplifier PCB Signal Return/Signal Ground.

 

[desertstorm]

need help..

I need help to the experts here in DIY to identify which wire colors is 220 volts AC this is multivoltage transformer i buy this in electronic work shop here in my place.. thank you so much and more power to all.

 

[jaagut]

Don't confuse Safety Earth with Signal Returns and Power Zero Volts.

The Safety Earth runs from power input socket to Chassis.

The PSU Zero Volts runs to the Main Audio Ground.
The RCA input socket has a Signal Return. This Signal Return MUST connect the Source to the amplifier PCB Signal Return/Signal Ground.

Hi Andrew,

Is this what Apex meant as you have explained?

 

[TonyTecson]

I need help to the experts here in DIY to identify which wire colors is 220 volts AC this is multivoltage transformer i buy this in electronic work shop here in my place.. thank you so much and more power to all.

going by color is not guaranteed...

what you can do is get a 6 volt ac source and inject this voltage to any secondary winding...

then measure the voltage on the primary side, these are the coils that have higher dc resistance, there will be at least 2 sets of primary coils with taps for 100, 110 and 120...

you can connect the primaries so that you get the highest voltage....

 

[TonyTecson]

Hi Andrew,

Is this what Apex meant as you have explained?

not Andrew, but the safety ground connects to the chassis metalwork directly, i usually do that using a ring lug and bolting to one of the IEC fasteners...

now for your PSU ground, it does not need to connect to the chassis at the same point as your safety ground, but you must connect that to a single point wherein all other circuit grounds connect....you can ground that to another point on your chassis...

avoid using the chassis to run psu currents, all B+ leads must have its own B- returns leads.....if you follow this you will have a quiet amp...

 

[desertstorm]

going by color is not guaranteed...

what you can do is get a 6 volt ac source and inject this voltage to any secondary winding...

then measure the voltage on the primary side, these are the coils that have higher dc resistance, there will be at least 2 sets of primary coils with taps for 100, 110 and 120...

you can connect the primaries so that you get the highest voltage....

Sir tony sir thank you so much...maraming salamat po sir...

 

[desertstorm]

MY JUNK TRANSFORMER..

Good morning to all dyers..sir tony i got it'' here is the secondary output of my transformer 32.2-0-32.2 thank you sir TONY more power to you sir and god bless...

 

[TonyTecson]

that's good to know....

 

[desertstorm]

B500 TEF

MY B500 TEF PROJECT'' its working now ..very loud sound i like it...thank you so much to sir mile and sir willy for this wonderful amplifier...

 

[desertstorm]

B500 TEF

PIC. OF MY B500 TEF PROJECT..THANK YOU SIR APEX AND SIR WILLY...

 

[khalsa]

nice work desertstorm