100W Ultimate Fidelity Amplifier

[macd]

Switch on delay???

Speaker Terminal can be add to any amp with rail voltage over +/-36V DC and rail fuses. I prefer this protect more than protect with relay.

Hello Apex.....

And the switch on delay.....do you still need it?

Regards,
Macd

 

[apexaudio]

Hello Apex.....

And the switch on delay.....do you still need it?

Regards,
Macd

Switch on delay can be done with MUTE circuit on amp input with fet. Schematic you can find in thread http://www.diyaudio.com/forums/solid-state/167363-mic-line-eq-preamps-4.html post #35
Regards

 

[apexaudio]

Turn on/off mute input circuit, without relay at the amp output.

 

[macd]

Re

Turn on/off mute input circuit, without relay at the amp output.

Hi Apex,

how does this circuit work? What does this do? If I have this on the input, I don't need a switch on delay circuit. Is this correct? Any progress on Studio Reference PCB?

Regards,
Macd;

 

[apexaudio]

Hi Apex,

how does this circuit work? What does this do? If I have this on the input, I don't need a switch on delay circuit. Is this correct? Any progress on Studio Reference PCB?

Regards,
Macd;

Fet short circuit amp input to GND and mute singnal when amp switch off, and umute with delay when amp switch on. DIY version of 'Studio Reference Amp' PCB will be share soon.
Regards

 

[macd]

Re

Fet short circuit amp input to GND and mute singnal when amp switch off, and umute with delay when amp switch on. DIY version of 'Studio Reference Amp' PCB will be share soon.
Regards

Thanks

 

[apexaudio]

Thanks

Thank You, real diyers like you is the reason for shareing
Regards

 

[apexaudio]

Do not connect speaker terminal on amp output before test amplifier, and measure there is no DC voltage on amp out.

 

[SaMaHa]

You will get a distortion of sound.

 

[apexaudio]

You will get a distortion of sound.

 

[rakesh_sharma23]

Hi,
Found this circuit and i tried it on vector board. Giving good sound.. Can you help me out what cound be the wattage and any thing to be improvide.

 

[rakesh_sharma23]

Sorry Wrong file attachend. This is the corredt component layout.

 

[rakesh_sharma23]

Sorry Wrong file attachend. This is the corredt component layout.

MOSFET are face down.

 

[rakesh_sharma23]

Made a Protype of above give circuit using two TIP35c in Parallel.

This is also giving good quality and powerfull output.

 

[apexaudio]

Hi,
Found this circuit and i tried it on vector board. Giving good sound.. Can you help me out what cound be the wattage and any thing to be improvide.

Go to posts #202 and #345, and you can see different for MOSFET and BJT output stages with same topology.
Regards

 

[apexaudio]

Sorry Wrong file attachend. This is the corredt component layout.

You still have erors on your schematic, I suggest you: do not improve anything, just keep it simple (looks like 'CITATION 12' http://cygnus.ipal.org/mirror/www.passlabs.com/images/citation.pdf). Change some values to make it work correct. You can get over 50W from your amp.
Regards

 

[rakesh_sharma23]

Thank you sir for your kind reply..

Can you suggest which amp is better for 28v +- supply and 4 ohms load, the above or TDA7294 or some thing else with better sound quality.

 

[apexaudio]

Thank you sir for your kind reply..

Can you suggest which amp is better for 28v +- supply and 4 ohms load, the above or TDA7294 or some thing else with better sound quality.

I suggest you LM3886.
http://www.diyaudio.com/forums/chip-amps/162099-lm3886-schematics-pcb.html
Regards

 

[apexaudio]

Thank you sir for your kind reply..

Can you suggest which amp is better for 28v +- supply and 4 ohms load, the above or TDA7294 or some thing else with better sound quality.

Amplifier with TDA7294 (stereo+PSU) you can find in thread:
http://www.diyaudio.com/forums/chip-amps/162179-tda7294-stereo-bridge-psu.html
Regards

 

[apexaudio]

Powerfull version made for test have only 1mV DC offset.