900W H-class PA Amp with Limiter

[apexaudio]

Nsl32

If LDR was 10k in dark, and 100R when lighted with LED than can work in limiter. Better use NSL32.

 

[andrewlebon]

hi engel dela pena
greetings thanks for the nice thought have managed to find
them will arrive in a week have you managed to get all parts if u need any part
after a month can send you from australia
thanking you
andrew lebon
get going with your pcb fill it will send you items needed

 

[engel dela pena]

hi engel dela pena
greetings thanks for the nice thought have managed to find
them will arrive in a week have you managed to get all parts if u need any part
after a month can send you from australia
thanking you
andrew lebon
get going with your pcb fill it will send you items needed

h900 would be very interesting
i have to use what i already have as of now
do you have the link of this supplier from australia?
i already have the pcb for h900
and other parts
except this nsl32 and ir2117
but i'm not closing doors upon building h900
as of now since h900 and b500 parts are almost the same
its not that bad for me to go for the b500
as apex told me
b500 can give 2x450w @ 4 R
55-0-55ac pair of 20,000uf using a big torroid
good luck to your h900
i will find my way finding this ir & nsl
at the same time building b500

regards

 

[apexaudio]

h900 would be very interesting
i have to use what i already have as of now
do you have the link of this supplier from australia?
i already have the pcb for h900
and other parts
except this nsl32 and ir2117
but i'm not closing doors upon building h900
as of now since h900 and b500 parts are almost the same
its not that bad for me to go for the b500
as apex told me
b500 can give 2x450w @ 4 R
55-0-55ac pair of 20,000uf using a big torroid
good luck to your h900
i will find my way finding this ir & nsl
at the same time building b500

regards

Good luck with building B500, this is much superior amplifier more than look like. Using OP amps in this circuit as AC bufer and DC servo is adventage than similar design, and give beter muching, beter offset than bad descrite diff. This is PA amplifier with HI-FI sound.
Regards

 

[Dominic74]

Hi Mili,

Can I use BA159 instead of BAV21

 

[apexaudio]

Hi Mili,

Can I use BA159 instead of BAV21

No, U have some possible replace in thread, post #310
Regards

 

[Dominic74]

Hi Mili,

I will use MUR120.

Thanks a lot

 

[dexter2003]

hi mili,

i will use mur120.

Thanks a lot

or mur140

 

[apexaudio]

or mur140

or MUR160 😉

 

[gooseneck]

if somebody of you have a service manual for MAR6 please kindly send me one for i owe it to him for a lifetime, kasi ung left channel ng MAR6 ko umusok at nasira, at kailangan ko po ng schematic or service manual..

thanks....

 

[apexaudio]

if somebody of you have a service manual for MAR6 please kindly send me one for i owe it to him for a lifetime, kasi ung left channel ng MAR6 ko umusok at nasira, at kailangan ko po ng schematic or service manual..

thanks....

Phonic MAR6 is clone of QSC USA1300 with different PCB and output devices.
http://www.qscaudio.com/support/library/schems/Discontinued/USA Series/usa1300.pdf
Regards

 

[electra_ina]

Hi, Apex..I want to confirm about layout PCB step driver with TL 072, I crop the picture and with code colour red in the bottom side. Is right value 47pf not 0,1uf??
http://upload.kapanlagi.com/h/20100414092340_APEX_Hclass_Power_DriverMON2_4bc5272cc7a92.jpg

 

[gooseneck]

Qsc1300

Phonic MAR6 is clone of QSC USA1300 with different PCB and output devices.
http://www.qscaudio.com/support/library/schems/Discontinued/USA Series/usa1300.pdf
Regards

Thanks for the info my friend but the MAR6 uses different devices which is available in our locality.

by the way my friend where can i buy large torroidal transformer here in Raon st.? specification is 65V-0-65V, 30-40A sec., primary 220v-0. thanks...

 

[engel dela pena]

electra_ina

 

[electra_ina]

Thanks Engel...but in the picture can't see value C (brown). Any way, I sure this cap value is 47 pf, similar with C ceramic in another place..
Btw..can I use RHRP3060 to replace MUR160??
Regards,

 

[apexaudio]

Hi, Apex..I want to confirm about layout PCB step driver with TL 072, I crop the picture and with code colour red in the bottom side. Is right value 47pf not 0,1uf??
http://upload.kapanlagi.com/h/20100414092340_APEX_Hclass_Power_DriverMON2_4bc5272cc7a92.jpg

Right value is 47pF

 

[engel dela pena]

apex,
please give me idea how to use this step driver using tlo72
do you have amp schematic with tlo step driver for diy purpose not qsc or crown schematic.
pcb if possible much appreciated
regards

 

[apexaudio]

apex,
please give me idea how to use this step driver using tlo72
do you have amp schematic with tlo step driver for diy purpose not qsc or crown schematic.
pcb if possible much appreciated
regards

I can give U idea how to use step driver using tl072 with B500, but I have no any pcb for amplifier with integrited this step driver. U must design PCB by yourself.
Regards

 

[engel dela pena]

I can give U idea how to use step driver using tl072 with B500, but I have no any pcb for amplifier with integrited this step driver. U must design PCB by yourself.
Regards

b500 with step driver is very much appreciated
please help me how to apply step driver tlo to b500
thanks

 

[engel dela pena]

Thanks for the info my friend but the MAR6 uses different devices which is available in our locality.

by the way my friend where can i buy large torroidal transformer here in Raon st.? specification is 65V-0-65V, 30-40A sec., primary 220v-0. thanks...

torroid
try post this in another thread
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