500W PA amplifier with Limiter

[engel dela pena]

a square,
please take time to read previous post

 

[AndrewT]

please take time to read previous post

can you tell us what level of hum and buzz is at the speaker terminals when the RCA input is shorted with Rs=0r0.

 

[apexaudio]

Heii..Apex..I found problem on B500. Like this:
I used PSU +/-44VDC, If I not applied fuse, I measure voltase (+) and (-) to ground is simetris (44 vdc), also (+) and (-) to output power is simetris (44 vdc). But when I used fuse 10A, voltase (+) and (-) to ground not simetris, (+) to ground = 43vdc and (-) to ground only 35 vdc. Also (+) to out PA only 35vdc and (-) to out PA= 43 vdc.
If I used fuse 0,2A, voltase (+) to ground = 43vdc and (-) to ground = 42,3vdc. Also (+) to out PA=42,3vdc and (-) to out PA = 43vdc..
Please help me..
Regards

Use 10R resistors insted fuses and measure voltage drop on them, did you measure DC offset and voltages on other suggested points.
Regards

 

[electra_ina]

Use 10R resistors insted fuses and measure voltage drop on them, did you measure DC offset and voltages on other suggested points.
Regards

Thanks..I will try it..

 

[boggart dapo]

hi sir how does the h900 works have you tried it already,,

 

[apexaudio]

hi sir how does the h900 works have you tried it already,,

There is comments in threads, do you read them?

 

[engel dela pena]

tlo step

 

[apexaudio]

TL072 classH Step Driver (correct PCB component layout)

 

[engel dela pena]

previous layout

 

[engel dela pena]

previous layout

 

[engel dela pena]

apex,
CORRECTED LAY OUT

 

[engel dela pena]

APEX,
CAPS & DIODES CHANGES FROM PREVIOUS LAYOUT
THANKS MR MILE

 

[engel dela pena]

THANKS

 

[engel dela pena]

Here is revised pcb. Hope it is ok now.

hello mate
can i send you private message?

 

[A square]

hi

ok thanx sir....

 

[Djnits]

hello mate
can i send you private message?

 

[Djnits]

ok thanx sir....

 

[apexaudio]

 

[coolet]

Small Modification

 

[apexaudio]

Coolet, thank You for this pcb design, can You help me to redesign pcbs of my old projects?
Regards