500W PA amplifier with Limiter

[irvynejay]

Originally Posted by apexaudio

TL072 Pcb and Component Layout.

Ty mile now ill try to connect Step drive to my B 500
pls check if anything wrong with my work.

[engel dela pena]

Originally Posted by apexaudio

TL072 classH Step Driver: Pcb and Component Layout.

so the -ref is i.c.pin1,2,3,
and +ref is ic,6,7,8,
the schematic must be?

[apexaudio]

TL072 classH Step Driver Schematic + PCB

[engel dela pena]

apex,
if the above is now correct,why pin 5,3 to bf422/423 base
it must be pin 1,7 to bf's base

[apexaudio]

Originally Posted by engel dela pena

apex,
if the above is now correct,why pin 5,3 to bf422/423 base
it must be pin 1,7 to bf's base

I made drawing mistake, go to post #923.
Regards

[engel dela pena]

Originally Posted by apexaudio

I made drawing mistake, go to post #923.
Regards

thank you apex,
now its clear for me

[Mamak]

Originally Posted by apexaudio

TL072 classH Step Driver Schematic + PCB

apex.for b500 amp what function at input for a and b?and can change 2sc5200 with mjl4281a?

[apexaudio]

B500 + TL072 Step Driver for classH.

[apexaudio]

Originally Posted by Mamak

apex.for b500 amp what function at input for a and b?and can change 2sc5200 with mjl4281a?

A and B use for bridge mode, MJLs can be used instead 2SA/SC

[apexaudio]

Originally Posted by irvynejay

Ty mile now ill try to connect Step drive to my B 500
pls check if anything wrong with my work.

Use circuit from post #928, and correct pins layout for TL072 (drawing mistake)
Regards