900W H-class PA Amp with Limiter - Page 102 - diyAudio
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Old 16th December 2010, 07:51 AM   #1011
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Quote:
Originally Posted by Tekko View Post
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.
hi tekko,

left side power devices are connected through a jumper in its original pcb too.
i have added it now in the silk.

regards

ravs


be a vegeterian.....
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Last edited by ravslanka; 16th December 2010 at 08:04 AM.
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Old 16th December 2010, 08:52 AM   #1012
Valenca is offline Valenca  Brazil
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Apex, do you can send us the vertex full schematics + PCB for DIY ?
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Old 16th December 2010, 09:24 AM   #1013
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This thread is very long

Cant find VI Limiter in Class H design and how does protection circuit in short circuit or overload situation work ?
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Old 16th December 2010, 01:25 PM   #1014
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Originally Posted by NMOS View Post
This thread is very long

Cant find VI Limiter in Class H design and how does protection circuit in short circuit or overload situation work ?
With peak current over 8A per output circuit around 2N5401 give AC signal on amp PRO pin, and protect circuit disconnect speaker. Protect will connect speaker after turn amp off and turn on again (power on reset). If you not sure that usen outputs will not break with 8A current don't try to short circuit amp out.
Regards
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Old 16th December 2010, 02:21 PM   #1015
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Default exited to test dis amp.........

hello sir

try to make your h900 . hard to find ir2117 but anyways i have some..

ready to test...

pls check out my mistakes ....

thank u sir ...
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File Type: jpg DSC_0602.jpg (416.4 KB, 991 views)
File Type: jpg DSC_0600.jpg (407.3 KB, 947 views)
File Type: jpg DSC_0601.jpg (376.6 KB, 447 views)
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Old 16th December 2010, 02:35 PM   #1016
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Quote:
Originally Posted by aman khalsa View Post
hello sir

try to make your h900 . hard to find ir2117 but anyways i have some..

ready to test...

pls check out my mistakes ....

thank u sir ...
Nice work, don't forget wire jumper on botom side pcb, use 100w series bulb in primary, and don't forget to connect input gnd to psu gnd.
Regards
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Old 16th December 2010, 03:04 PM   #1017
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ok sir

thank u...
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Old 16th December 2010, 06:52 PM   #1018
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Quote:
Originally Posted by apexaudio View Post
With peak current over 8A per output circuit around 2N5401 give AC signal on amp PRO pin, and protect circuit disconnect speaker. Protect will connect speaker after turn amp off and turn on again (power on reset). If you not sure that usen outputs will not break with 8A current don't try to short circuit amp out.
Regards

very good !!!!! but please where can I find the protection circuit in this long thread ?
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Old 16th December 2010, 07:40 PM   #1019
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Originally Posted by NMOS View Post
very good !!!!! but please where can I find the protection circuit in this long thread ?
Protect schematic and pcb.
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File Type: jpg APEX H900 Protect Component layout.jpg (664.6 KB, 654 views)
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Old 16th December 2010, 07:53 PM   #1020
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PSU schematic and pcb.
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