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....
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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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
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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.
Regards
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
JBL profesional speakers have inverted phase, no need to invert phase if use with H900 and B500.
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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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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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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 ?
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
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
very good !!!!! but please where can I find the protection circuit in this long thread ?
Protect schematic and pcb.
