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Old 22nd December 2010, 05:42 PM   #1091
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Quote:
Originally Posted by Djnits View Post
im sorry im wrong, bias i mean, yes sir apex i got .8v at the r20 and r21...my test piont accross the 100R, it is right? pls guid me

regards
If you want adjust bias, use 2k variable resistor instead R22 (680R), and set abut 8mV on 0,33R/5W resistors, that will be 25mA per output.
Regards
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Old 22nd December 2010, 06:22 PM   #1092
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Originally Posted by apexaudio View Post
2N5401 is for VI cut-out protect.
Feedback circuit is important NE5532 can be replaced with another OP amp.
i'm sorry sir if interupt, can i use another type of 2n5401 with the another one but still have the same
Collector-Base Voltage VCBO -160 V
Collector-Emitter Voltage VCEO -150 V
Emitter-Base Voltage VEBO -5 V
please
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Old 22nd December 2010, 07:30 PM   #1093
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Originally Posted by ndondozz View Post
i'm sorry sir if interupt, can i use another type of 2n5401 with the another one but still have the same
Collector-Base Voltage VCBO -160 V
Collector-Emitter Voltage VCEO -150 V
Emitter-Base Voltage VEBO -5 V
please
You can use MPSA92 instead 2N5401.
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Old 23rd December 2010, 07:44 AM   #1094
Djnits is offline Djnits  Philippines
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Quote:
Originally Posted by apexaudio View Post
If you want adjust bias, use 2k variable resistor instead R22 (680R), and set abut 8mV on 0,33R/5W resistors, that will be 25mA per output.
Regards
ill put the 2k and then i adjust the bias, going to rigth the negative output verry hot, i return it to left it back to normal temp..... but the i can't goted the 8mV on .33R/5w, but only 356mV, the same w/ the other side....but sounds good....

regards
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Old 23rd December 2010, 08:07 AM   #1095
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hi apexaudio
greetings can you tell me why i am getting 110 volts output on both collector negative and positive of output transistors using tlo 72 step driver need help please checked everything
thanking you
andrew lebon
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Old 23rd December 2010, 02:00 PM   #1096
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Quote:
Originally Posted by ndondozz View Post
i'm sorry sir if interupt, can i use another type of 2n5401 with the another one but still have the same
Collector-Base Voltage VCBO -160 V
Collector-Emitter Voltage VCEO -150 V
Emitter-Base Voltage VEBO -5 V
please
thanks sir thats verry helpfull, from now i can star my project, cause i'm verry dificult to find 2N5401, i'll soon post my project
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Old 23rd December 2010, 10:20 PM   #1097
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hi apexaudio
greetings can you tell me why i am getting 110 volts output on both collector negative and positive of output transistors using tlo 72 step driver need help please checked everything please it would be nice if you can explain how
tlo 72 stepdriver works and are there any test voltages for step driver
thanking you
andrew lebon
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Old 24th December 2010, 03:49 AM   #1098
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hi apexaudio
greetings have tried triple ef stage is working in 10 output pair
can i use your IR2117 step driver with this setup as tlo72 step driver is giving
problem waiting for your adivse
thanking you
andrew lebon
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Old 24th December 2010, 07:19 AM   #1099
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Default protect circuit works

Quote:
Originally Posted by andrewlebon View Post
hi apexaudio
greetings have tried triple ef stage is working in 10 output pair
can i use your IR2117 step driver with this setup as tlo72 step driver is giving
problem waiting for your adivse
thanking you
andrew lebon
andrewlebon pls check mail i sent some picture and my new Apex protect is working without error
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Old 24th December 2010, 01:00 PM   #1100
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hi apex audio
greetings want to ask you that can you please tell me if i am
wrong
1 pin 7 of ic TLO72 should go to base of transitor BF422 but 5 no pin is going to base
2 from 5 no pin 10K resitor should be ground
3 1 no pin of ic TLO 72 should go to base of transistor BF423 but 3 no pin is going to base
4 3 no pin should be ground via 10 K RESITOR
PLEASE TELL ME IF I AM CORRECT FOLLOWING SCHEMATIC
hopimg you can help me
thanking you
andrew lebon
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