900W H-class PA Amp with Limiter

[gooseneck]

To Sir Mile,
i have a diagram here by pagarigan i used it as my power amp since year 1992 and it work so nicely without any problems, supply is 70V-0-70V, and i want to employ TL072 stepdriver to make it a Class H power amplifier. please help me to do this...thanks and merry christmas....

[apexaudio]

Originally Posted by gooseneck

To Sir Mile,
i have a diagram here by pagarigan i used it as my power amp since year 1992 and it work so nicely without any problems, supply is 70V-0-70V, and i want to employ TL072 stepdriver to make it a Class H power amplifier. please help me to do this...thanks and merry christmas....

Output stage on your amp is similar to crown, use crown schematic, TL072 classH step driver is also based on crown.
http://www.crownaudio.com/pdf/legacy/s-c1100as-03.pdf
Regards

[apexaudio]

18 inch horn-reflex sub.

[apexaudio]

Dual 18 inch Horn-Reflex Sub

[apexaudio]

B181

[apexaudio]

H900 and B500 have inverted output phase for useing with B2181 and B181 subs. Speakers in B2181 and B181 are in reverted position for beter cooling.
If you use B2181 and B181 with another amps you must reverted (+) and (-) on speaker terminal or you can turn around speaker in standard position, also if you use H900 and B500 with another speakers you must reverted (+) and (-) on speakers terminals or amps output terminals.
Regards

[apexaudio]

JBL profesional speakers have inverted phase, no need to invert phase if use with H900 and B500.

[darwinbibit]

Originally Posted by ravslanka

hi apex,

this is the final pcb.what about zf15 connected to nsl32.iwill be using
mur1560/stth15r06 instead of 1620ct.will it be ok.

pcb size is 296x62mm .

http://img535.imageshack.us/img535/3548/46787365.gif


thanks in advance

ravs


be a vegeterian.....

ravslanka sir do you have a parts placement guide of your pcb foil pattern if you have can you post it pls. thanks

[ravslanka]

Originally Posted by darwinbibit

ravslanka sir do you have a parts placement guide of your pcb foil pattern if you have can you post it pls. thanks

hi darwinbibit,

here is foil pattern and silk.do you gonna use toner transfer method.
pdf is mirrored.

best regards

ravs

be a vegeterian......

[Tekko]

That layout will not work, the power devices on the left doesent have the common end on the emitter resistors tied to the right side emitter resistors where the speaker output is.