900W H-class PA Amp with Limiter

[apexaudio]

Step Driver schematic from Zeck Audio power amplifier PT series?

Yes, step driver from Zeck PT-9 upgrade with extra higher voltage fets.

 

[qsa]

will add Class H Step Driver in Quasis NMOS Amplifier schematic

after finished schematic will upload here, lets check for faults

hope it will work

 

[andrewlebon]

power amp

hi qsa

greetings how is power amp n mos sounding and stability
trying to make it but gerber files to complicated any new modifications
please let us know will keep trying as i have all components
thanking you
andrew lebon

 

[apexaudio]

will add Class H Step Driver in Quasis NMOS Amplifier schematic

after finished schematic will upload here, lets check for faults

hope it will work

I have no expirience with amplifiers in H or G class which using mosfet in output stage. With BJT have no problem.

 

[savu]

Do anyone want to DIY something like that?

Hello apexaudio. I am concidering to DIY the amplifier after i will finish a 2KW SMPS project with my girlfriend (helping her to learn electronics for school). Thank you for the the PCB design.

 

[andrewlebon]

hi apex audio
greetings pcb ready inserting components some pics

thanking you
andrew lebon

 

[apexaudio]

hi apex audio
greetings pcb ready inserting components some pics

thanking you
andrew lebon

Nice work, dont forget wire jumper.

 

[apexaudio]

Hello apexaudio. I am concidering to DIY the amplifier after i will finish a 2KW SMPS project with my girlfriend (helping her to learn electronics for school). Thank you for the the PCB design.

I am interested about this 2kW SMPS, can it give 4x55V DC?

 

[savu]

I am interested about this 2kW SMPS, can it give 4x55V DC?

the original schematic I will use actually delivers 2 x 60V dc. but it can be modified. i will keep you informed about the way things are going.

regards,

 

[apexaudio]

the original schematic I will use actually delivers 2 x 60V dc. but it can be modified. i will keep you informed about the way things are going.

regards,

Then can be used two in series circuit 🙂

 

[savu]

Then can be used two in series circuit 🙂

hello apex,

I will redesign the secondary part and make it +110v, +55v, GND, -55v, -110v
is that what you need?

regards,

 

[apexaudio]

hello apex,

I will redesign the secondary part and make it +110v, +55v, GND, -55v, -110v
is that what you need?

regards,

Yes, and 2x18V 500mA, but not bound.

 

[apexaudio]

OP amp in VAS use only DC feedback, and work as buffer. Point A on one amp wired with point B on second amp for bgidge.

 

[savu]

Yes, and 2x18V 500mA, but not bound.

hello apex,

I will try to design the PCB and publish the schematic this weekend. If it's all good I will start work on it next week. All I need is to get proper litz whire, aditional low ESR caps, and another ferrite core.

regards,

 

[apexaudio]

hello apex,

I will try to design the PCB and publish the schematic this weekend. If it's all good I will start work on it next week. All I need is to get proper litz whire, aditional low ESR caps, and another ferrite core.

regards,

If you need some help, I have SMPS electronic circuit...
Regards

 

[gaetan8888]

Hello apexaudio

Do you have some SMPS schematics that can be use with most class A/B amps ?

Thank

Bye

Gaetan

 

[apexaudio]

Hello apexaudio

Do you have some SMPS schematics that can be use with most class A/B amps ?

Thank

Bye

Gaetan

Yes but I use wired ferite core of Behringer, and I dont know kind and number of turns.

 

[andrewlebon]

hi apexaudio
greetings work in progress

thanking you
andrew lebon

 

[savu]

If you need some help, I have SMPS electronic circuit...
Regards

hello apex,

maby it would be some help. i have some experience in building smps. send post the schematic or send it by mail (savu_silviu@hotmail.com).

regards,

 

[apexaudio]

hi apexaudio
greetings work in progress

thanking you
andrew lebon

Comutation diode SFA1603 in negative side have wrong direction, be more careful.
Regards