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Old 16th January 2012, 06:20 PM   #1
timwebb is offline timwebb  United States
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Default brutus bxi 1600

i got this amp in for repair and it has irf3710 as output transistors. just trying to confirm if those should be there. ive never seen then in any other brutus amp.
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Old 16th January 2012, 07:09 PM   #2
timwebb is offline timwebb  United States
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also what is vr10 used for? the legs are cooked under the board.

Last edited by timwebb; 16th January 2012 at 07:12 PM.
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Old 16th January 2012, 07:15 PM   #3
timwebb is offline timwebb  United States
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Old 16th January 2012, 07:44 PM   #4
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The pot is to adjust the DC offset.

The 3710s were used in some of the 4080 based amps.
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Old 16th January 2012, 08:27 PM   #5
timwebb is offline timwebb  United States
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the transformers are whining and the are around the dc off set pot are getting hot.
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Old 16th January 2012, 08:38 PM   #6
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The large resistors are producing the heat.

Does the amp produce clean audio?
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Old 16th January 2012, 10:07 PM   #7
timwebb is offline timwebb  United States
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some of the output transistors are bad. it didnt set off the protection. can i use 640n's in this amp?
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Old 16th January 2012, 10:31 PM   #8
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No. You need to use the IRF3710Z (<<< Z is very important). Replace all of the outputs and the HIP4080.
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Old 16th January 2012, 10:55 PM   #9
timwebb is offline timwebb  United States
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this the right one?

AUIRF3710Z for International Rectifier | Arrow Electronics Components
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Old 16th January 2012, 11:34 PM   #10
Dr Zeus is offline Dr Zeus  United States
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Thats interesting... Now, how come when I search Arrow for IRF3710Z I cant find the TO-220 version? What does the AU in AUIRF mean?
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