100W Ultimate Fidelity Amplifier

[smartx21]

Where are the heatsinks???

 

[Mamak]

Where are the heatsinks???

i still not install.i only want try first.if it work.i will cut the heatsink

 

[smartx21]

Amp needs heatsink even for testing purposes!
Use something for a while, improvise.
No heatsink will lead to pain...

 

[apexaudio]

plez check apex.now i disconnect diode at power output.sorry picture not good quality

I need pictures with PSU and wireing, I can't see enough for help you, give some informations about rail voltages, do you use 10R resistors instead fuses for bias setup?

 

[Mamak]

I need pictures with PSU and wireing, I can't see enough for help you, give some informations about rail voltages, do you use 10R resistors instead fuses for bias setup?

no sir.should i install 100 ohm res?

 

[apexaudio]

no sir.should i install 100 ohm res?

Yes, and don't connect speakers if there is DC offset on the amp output...

 

[Mamak]

Blue PCB

apex.if i add 1 pair 2sc5200,what voltage supply rail?

 

[apexaudio]

apex.if i add 1 pair 2sc5200,what voltage supply rail?

If you add one or more pairs of outputs no need to change rail voltage, exsept you want more power...
Regards

 

[Mamak]

If you add one or more pairs of outputs no need to change rail voltage, exsept you want more power...
Regards

yes.i want add 1 more pair output.and want more power.what voltage rail should i give?and bias adjust still 4.7v?

 

[apexaudio]

yes.i want add 1 more pair output.and want more power.what voltage rail should i give?and bias adjust still 4.7v?

For bias adjust use 10R instead fuses and set 1V on them for single pair or 2V for two pairs. I suggest rail voltage +/-45V for single pair or +/-55V for two pairs (+/-65V 3 pairs, +/-75V 4 pairs, +/-85V 5 pairs and +/-95V 6 pairs or more).
DC offset is about +/-10mV.
Regards

 

[emmi]

does this amp work for continues program that is for listening songs ultimately

 

[apexaudio]

does this amp work for continues program that is for listening songs ultimately

I don't understand this question.

 

[emmi]

I don't understand this question.

does this amp work for PA applications?

 

[apexaudio]

does this amp work for PA applications?

This is amp for 'Home Audio', but can be use for PA applications with short circuit protection from 'DC Servo Mosfet Amp' PSU.
Regards

 

[emmi]

what will be the maximum output power if the rail voltage is +/-75 and how much load can i put on it

 

[AndrewT]

expect a +-75Vdc supply to sag between 5V and 10V depending on how you build the PSU.
Expect the amplifier to drop/lose another 5V before it feeds the output.
Combining these two losses, expect ~60Vpk at the output.

P = Vpk^2 / Rload / 2

225W into 8r0, 450W into 4r0.
Work all the other impedances out from this model.

If you want 225W into 8r0 from it, then expect to provide 900W of mosFET output stage or 1200W of BJT output stage.
If you want/need to drive 4ohms speaker then double the wattage of the output stage.

 

[emmi]

expect a +-75Vdc supply to sag between 5V and 10V depending on how you build the PSU.
Expect the amplifier to drop/lose another 5V before it feeds the output.
Combining these two losses, expect ~60Vpk at the output.

P = Vpk^2 / Rload / 2

225W into 8r0, 450W into 4r0.
Work all the other impedances out from this model.

If you want 225W into 8r0 from it, then expect to provide 900W of mosFET output stage or 1200W of BJT output stage.
If you want/need to drive 4ohms speaker then double the wattage of the output stage.

why do we need 900watt of mosfet output stage for 225watt into 8 ohms

i didn't understand your answer

 

[AndrewT]

I think you understand my statement.
I also think you don't like my statement.

 

[svsommer]

Hello
how do I print the pcb layout correctly formatted
sincerely
svsommer

 

[emmi]

I think you understand my statement.
I also think you don't like my statement.

why do you think so