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Old 25th November 2010, 10:45 PM   #881
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Default Many thanx

Quote:
Originally Posted by apexaudio View Post
80vac 40vac 0 40vac 80vac is correct,
Regards
ok ty mile ill post when im done with my new B500 with your step drive TL072
rewinding the trapo now and one more thing can this trapo 55v 35v 0 35v 55v can i use this for testing purposes?
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Old 25th November 2010, 11:03 PM   #882
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Originally Posted by irvynejay View Post
ok ty mile ill post when im done with my new B500 with your step drive TL072
rewinding the trapo now and one more thing can this trapo 55v 35v 0 35v 55v can i use this for testing purposes?
You can use it for testing class H amps (B500+TL072step, H900...).
Regards

Last edited by apexaudio; 25th November 2010 at 11:12 PM.
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Old 25th November 2010, 11:07 PM   #883
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Quote:
Originally Posted by apexaudio View Post
You can use it for testing or for B250.
I mean with trapo 55vac 35vac 0 35vac 55vac can i use this on b500 with tl072 step drive for test?
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Old 26th November 2010, 09:49 AM   #884
mathez is offline mathez  Indonesia
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Quote:
Originally Posted by engel dela pena View Post
mathez,
22r get burned when you forgot jumper wire
there is no forgot jumper wire
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Originally Posted by apexaudio View Post
Can you post pictures? Do you connect input GND to PSU GND?
input GND to PSU GND is ok,.
i will post pcture soon as possible
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Old 26th November 2010, 12:11 PM   #885
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Default upgrading B500 with Tl072 step drive

Almost done updating B500 to H class i hope it works for me

pictures attach
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File Type: jpg DSC_0015_2.JPG (445.8 KB, 793 views)
File Type: jpg DSC_0016.JPG (338.2 KB, 693 views)
File Type: jpg DSC_0017.JPG (400.9 KB, 586 views)
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Old 26th November 2010, 12:54 PM   #886
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Default wich is correct

to mile pls help

lol my bad which of this is correct1 or 2,i just want to make sure before i connect the step drive to my b500
Attached Images
File Type: jpg APEX TL072 Step Driver correct.jpg (230.9 KB, 599 views)
File Type: jpg APEX%20Hclass%20Power%20DriverMON[1].jpg (234.3 KB, 340 views)

Last edited by irvynejay; 26th November 2010 at 01:21 PM.
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Old 26th November 2010, 02:36 PM   #887
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Default hi

Quote:
Originally Posted by apexaudio View Post
Heating 4K7/2W is OK, what rail voltage you use?
Regards
i use 85-0-85v dc...
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Old 26th November 2010, 04:58 PM   #888
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Originally Posted by irvynejay View Post
to mile pls help

lol my bad which of this is correct1 or 2,i just want to make sure before i connect the step drive to my b500
Correct component layout is on picture 1.
Regards
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Old 26th November 2010, 05:04 PM   #889
sekhar is offline sekhar  India
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Quote:
Originally Posted by aman khalsa View Post
i use 85-0-85v dc...
hey aman i saw ur build it is just great . Did u use the drive transistor as same as the output transistors...???????????/




regards
sekhar
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Old 26th November 2010, 05:10 PM   #890
sekhar is offline sekhar  India
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Quote:
Originally Posted by apexaudio View Post
Correct component layout is on picture 1.
Regards
hi miles i was looking for some to 220 mosfets with complete plastic package so that i can use them in the step driver. using that plastic insulation for my earlier amp had lot of failure they simple use to melt. can u direct me towards some completely plastic package mosfets so that i dont have to use that plastic thing............. and one more thing can i use irfp260 or irfp250 instead of irf 540




regards
sekhar
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