900W H-class PA Amp with Limiter

[romulo_rosil]

Bos apex, my available power supply is 97-48-0-48-97 AC. Can i use that power supply for h900 and the rail switch is TL071?

 

[nix]

yes i did build it leach 700w but in 2 r witch is not good ,so far H900 is more clear and punchy to me

hi irvynejay,

where do you get parts of h900 specialy IR2117?

regards,
nix

 

[irvynejay]

i ordered it from china

 

[crazymechanic]

Hello Sir Apex , is that right that h900 output transistors 2sa5200 and 4300 i guess are powered from the MV in the schematic that would be 55/60 volts and the step driver from 55/60 volts too?
and when the output sags the supply rail the step drivers 55 volts kicks in to stabilise it ?
Have I got it right?

 

[soerdjanto]

H900 triple darlington

An externally hosted image should be here but it was not working when we last tested it.

 

[khalsa]

very nice KHALSA

 

[kaylan]

Wonderful work!

H900 triple darlington

An externally hosted image should be here but it was not working when we last tested it.

What is the power of this version?

 

[aman khalsa]

nice work sir...

H900 triple darlington

An externally hosted image should be here but it was not working when we last tested it.

hello sir
can u pls share this pcb with diyers ..??
thank u sir...

 

[gooseneck]

To Sir Soerdjanto,

Sir can u post the schematic diagram of this H900 triple darlington....?

thanks and regards.....

 

[Gitsa]

Hi everyone! I've already finished 2 module Apex h900, but there are some performance issues switcher h-class.
YouTube - ‪Apex amplifier‬‏

 

[DILIP KUMAR]

STEPDRIVER

DEAR APEXAUDIO SIR
hello this s my first post on diy fascinated by your h class
made your step transistorised version on positive side MV OUT is ok 55 volts out
but negative side on MV negative i am getting 110 volt out reffering to post 1344
transistors used are MPSA92 and 2N3906 is negative section schematic ok
please excuse my poor english
thanking you
warm regards
dilip

 

[Gitsa]

Who has the waveform, I want to compare. http://www.youtube.com/watch?v=yDeoWq8Cw7s

 

[kASD]

Very poor waveforms, result of flawed step driver.

 

[Gitsa]

And how is it fixed?

 

[kASD]

Ask the designer of this circuit

 

[Gitsa]

Sine from 20 Hz to 1 kHz pure, and then go patch distortion

 

[romulo_rosil]

The step driver is not good. what step driver that you used TL071?

 

[A square]

hello sir ...

sir apex how can we fix this problem ...???

pls help thank u.....

 

[Gitsa]

The step driver is not good. what step driver that you used TL071?

Step driver its ir2117.

 

[QQ12e5k1]

DEAR APEXAUDIO SIR
hello this s my first post on diy fascinated by your h class
made your step transistorised version on positive side MV OUT is ok 55 volts out
but negative side on MV negative i am getting 110 volt out reffering to post 1344
transistors used are MPSA92 and 2N3906 is negative section schematic ok
please excuse my poor english
thanking you
warm regards
dilip

try the correct schematic on post 1346