100W Ultimate Fidelity Amplifier

[apexaudio]

This is the stuff music is made of- not the typical recorded sound sadly so many hear. Great work!

Hi Sum,
I'm sorry, I'm not sure that I understand correctly,
Regards Mile

 

[apexaudio]

Ax-14

APEX AX-14 Schematics+PCB

 

[sumaudioguy]

Hi Sum,
I'm sorry, I'm not sure that I understand correctly,
Regards Mile

I simply mean that this is a design that should sound like music. So many designs sound like hard rain on a tin roof to me with the stereo playing inside the tin building during the hard rain.

 

[apexaudio]

I simply mean that this is a design that should sound like music. So many designs sound like hard rain on a tin roof to me with the stereo playing inside the tin building during the hard rain.

Thank U for metaphor explanation,
Regards

 

[maouna]

do you have a design with sziklai output of about 80 watt and the pcb?

 

[apexaudio]

do you have a design with sziklai output of about 80 watt and the pcb?

Can U translate me word "sziklai" or describe what U mean?

 

[event horizon]

Can U translate me word "sziklai" or describe what U mean?

CFP or complementary feedback pair

 

[Aldotin]

Sziklai=CFP

 

[apexaudio]

do you have a design with sziklai output of about 80 watt and the pcb?

This Schematics work OK, and on some thread U can find PCB.

 

[apexaudio]

Seems nobody want extra ordinary circuit, no metter if work perfect?

 

[maouna]

thank you. im looking for something simple right now with two transistors at the output,something like the APEX AX-14 you posted above,but with sziklai output stage

 

[event horizon]

thank you. im looking for something simple right now with two transistors at the output,something like the APEX AX-14 you posted above,but with sziklai output stage

Try searching for a circuit diagram of Douglas Self's "blameless" amplifier That is pretty straightforward & uses a CFP output stage, or sziklai as it's also known..

Bests

 

[apexaudio]

thank you. im looking for something simple right now with two transistors at the output,something like the APEX AX-14 you posted above,but with sziklai output stage

Crown is simple, and can work with single pair. I have similar circuit on small PCB which can be used as start point for crown.
http://www.diyaudio.com/forums/solid-state/162081-dc-servo-mosfet-amplifier-2.html
Regards

 

[apexaudio]

APEX AX-14 is not simple as it look like. Lot of work need to make "simple" circuit much more than complex, just look Nelson's amps.

 

[balaboo]

Mile;
Firstly I want to thank you for posting your designs here for everybody to (hopefully) build.
I heartily approve of your philosophy of using simple standard parts, that is what I do too.
Having said that, as other people have mentioned, your schematics seem to have mistakes (deliberate or not) in them, and it makes me wary of trying your designs.

It would be nice for somebody like ilimzm to provide a critique - I respect his comments !

 

[apexaudio]

Mile;
Firstly I want to thank you for posting your designs here for everybody to (hopefully) build.
I heartily approve of your philosophy of using simple standard parts, that is what I do too.
Having said that, as other people have mentioned, your schematics seem to have mistakes (deliberate or not) in them, and it makes me wary of trying your designs.

It would be nice for somebody like ilimzm to provide a critique - I respect his comments !

If you want to try some of my design don't worry, just posting, that is feedback what I want. I don't want to people just copy my PCBs.
Regards

 

[apexaudio]

Protect

Nobody like VI limiter in audio amplifier and possible distortion, but overcurrent can demage output. In PA short circuit on output for long time can damage amplifier with VI limiter also. This PSU have short circuit protect, and can help with experimenting amplifier. Schematics for short circuit protect can be implement in any DC protection.

 

[maouna]

my transformer is 24-0-24 volts ac , 200VA .would you mind telling me the component values i have to change in order for your circuit to work properly?

 

[apexaudio]

my transformer is 24-0-24 volts ac , 200VA .would you mind telling me the component values i have to change in order for your circuit to work properly?

1 Replace 1,5k/5w with 330R/2W for relay
2 Replace 0,1R/5W with 0,22R/5W for short-circuit detect
3 Replace 220k with 47k for DC detect
Rest will work with 35V DC, 6k8/1W for LED can be replaced with 3k9, but not necessary.

 

[apexaudio]

I adapt some of my old project for diy using available parts with single side PCB and no SMT parts, and some mistakes are not deliberate.