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Old 3rd December 2010, 03:11 AM   #1001
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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....
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Last edited by gooseneck; 3rd December 2010 at 03:29 AM.
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Old 3rd December 2010, 02:45 PM   #1002
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Quote:
Originally Posted by gooseneck View Post
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

Last edited by apexaudio; 3rd December 2010 at 02:53 PM.
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Old 9th December 2010, 12:33 PM   #1003
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Default APEX B181

18 inch horn-reflex sub.
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Last edited by apexaudio; 9th December 2010 at 12:58 PM.
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Old 14th December 2010, 05:59 PM   #1004
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Dual 18 inch Horn-Reflex Sub
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Old 14th December 2010, 09:21 PM   #1005
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B181
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Old 14th December 2010, 09:52 PM   #1006
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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.
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Old 14th December 2010, 10:39 PM   #1007
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JBL profesional speakers have inverted phase, no need to invert phase if use with H900 and B500.

Last edited by apexaudio; 14th December 2010 at 10:44 PM.
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Old 15th December 2010, 04:18 AM   #1008
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Quote:
Originally Posted by ravslanka View Post
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
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Old 16th December 2010, 07:27 AM   #1009
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Originally Posted by darwinbibit View Post
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......
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File Type: gif h900 toner.GIF (95.2 KB, 1640 views)
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File Type: pdf h900 toner.LAY].pdf (60.8 KB, 779 views)

Last edited by ravslanka; 16th December 2010 at 07:48 AM.
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Old 16th December 2010, 07:40 AM   #1010
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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.
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