500W PA amplifier with Limiter

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#2,161
ibanezbass said:
Hello APEX,
i finished your amp and i am really pleased with the sound.I get 45mv dc at the output.
My problem is that when i connect the output of the amplifier to the protect i get -78mv dc at the output and the protect circuit turns the speakers off.
All connections are ok i have checked many times.

Any help would be greatly appreciated.

Dear Regards
Click to expand...

Protect GND and amp PSU GND must be connected.
 
#2,165
My B500 in progress....

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#2,175
Apex B500 please is some one see any errors let me know

Hi guys!

I was doing this layout and I'm not sure if I got it correctly I spend maybe more than 5 hours or more, please is some one can see any error please let me know I have also the Sprint Layout format so you can use it too, I will share this for you guys. my brain is like this :hypno2: :scratch1:

Regards
vargasmongo3435
 

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#2,177
I'm doing Apex AX-14

I was doing that for a while but my brains are about to explode :hypno2: to much thinking trying to keep it as the original my friend, right know I'm working on Apex model AX-14 here is a small pic not done yet. 😛

Regards
vargasmongo3435
 

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#2,180
Dear Apex,

Good day and hope all is well with you and to all DIYERS.

I finally finish my B500 and my rail voltage is +/- 76VDC, but on the testing process i connected Input Ground and PSU Gnd as per your instruction but i'm still getting DC OUT (57VDC).

Please kindly check if i have mistake i attached herewith the pictures for component layout and copper side.

Looking forward your kind expertise/help and thank you in advance if anyone can help.

Regards,

Wiljj78

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