500W PA amplifier with Limiter

[AndrewT]

i have 3 speakers sir at 1000 watts each,, can this amplifier handle this..?? the amplifier wont be damage..//??

The output from a 54-0-54Vac transformer will be somewhere around 600W to 700W into 2.7ohms.
Will the output devices and drivers survive your operations?

 

[randyboy]

hi, what is the pcb size for b500 protect? and its parts lists tnx

 

[lawbadman]

Anyone have any PCBs for the B500 selling?

 

[eper puliran]

sir my amplifier has output when i test with multitester but when i load 3 speakers it will drop and no audio output,, where is the trouble for this amplifier sir,, good pm....

 

[jaagut]

sir my amplifier has output when i test with multitester but when i load 3 speakers it will drop and no audio output,, where is the trouble for this amplifier sir,, good pm....

what are the impedances of the 3 speakers?

assuming they are 8 ohms, when paralleled, it is equivalent to 2.67 ohms. this amp is not designed to run at this very low impedance, so probably the over-current protect triggered the audio cut-off.

 

[randyboy]

hi, can i use 1/2 watts resistors instead of 1/4 watts in b500 amp?tia

 

[AndrewT]

Will they fit?
Half watt are usually bigger and usually have thicker leadouts.

 

[TeHaa]

B500 TEF

Dear Mr Mile,

I redrew your APEX B500 layout and make it according to your TEF schematic design.
Whether this layout is correct?

For power supply I use 65-0-65 vac.
Is it safe to operate in 2X65vac ct with 6 pairs of 2SC5200&2SA1943?

 

[SYAHRUL]

ab class psu

 

[black]

B600 is the TEF scheme?

 

[randyboy]

Will they fit?
Half watt are usually bigger and usually have thicker leadouts.

yes it fits,but my question is whats the effect to the amp when i use 1/2 watts instead of 1/4?

 

[AndrewT]

The higher rated resistors run a bit cooler, but still dissipate the same heat.

 

[randyboy]

The higher rated resistors run a bit cooler, but still dissipate the same heat.

ok tnx.

 

[SYAHRUL]

B600 is the TEF scheme?

scematic TEF.

 

[SYAHRUL]

B600 is the TEF scheme?

scematic TEF

 

[apexaudio]

B600

 

[black]

schematic and pcb schematil please complete

 

[thimios]

schematic and pcb schematil please complete

schematic and pcb schematil please complete

 

[wattaniya]

hi apex sir,
can u upload a bridge switch image.

 

[wattaniya]

hi apex sir,
pls answer 3019 post.