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Old 3rd January 2011, 02:11 AM   #1
timwebb is offline timwebb  United States
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quick question im working on this memphis amp but the same output keeps blowing.
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Old 3rd January 2011, 02:40 AM   #2
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If it has parallel outputs, check the gate resistor for the one blowing and confirm that the connection between the gate leg and the gate resistor terminal reads 0 ohms.
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Old 4th January 2011, 01:31 AM   #3
timwebb is offline timwebb  United States
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also could a gain pot cause distortion?
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Old 4th January 2011, 02:53 AM   #4
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It could have an intermittent connection (either on the wiper or on the terminals) that could cause the signal to be distorted. Where the pot is in the feedback loop it could cause the signal to become extremely distorted if it opens or has a bad connection.

Can you post a photo of the distorted signal?
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Old 5th January 2011, 12:59 AM   #5
timwebb is offline timwebb  United States
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File Type: jpg IMG_20110104_194524.jpg (571.7 KB, 19 views)
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Old 5th January 2011, 02:45 AM   #6
timwebb is offline timwebb  United States
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when it plays it sounds full of static and when bass hits it cuts out and comes back in.
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Old 5th January 2011, 02:49 AM   #7
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Set the scope to 5v/division. Drive a sine wave into it (50-100Hz) to a level that will deflect the trace on the scope 3 divisions. Set the timebase on the scope so that there are ~3 full cycles displayed. You don't need to have a speaker connected. Post a photo.
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