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Rockford Fosgate T1500-bd
Rockford Fosgate T1500-bd
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Old 15th November 2019, 01:20 PM   #11
caraudioguy2100 is offline caraudioguy2100
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After closing the feedback loop the problem still exists on 4 of the outputs .
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Old 15th November 2019, 03:09 PM   #12
Perry Babin is offline Perry Babin  United States
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Did the pulse width change at all after installing the jumper?
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Old 15th November 2019, 03:29 PM   #13
caraudioguy2100 is offline caraudioguy2100
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Yes
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Old 15th November 2019, 03:42 PM   #14
Perry Babin is offline Perry Babin  United States
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I can't make any suggestions without seeing the waveforms.

With no rail voltage, you can ground the scope to the gate leg of the FET being checked to get the best signal.

Be sure that the rail caps are discharged.
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Old 26th November 2019, 10:42 PM   #15
caraudioguy2100 is offline caraudioguy2100
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Do you happen to know the value of the gain pot on this amp ?

Itís been replaced at some point and wondering if itís the correct value
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Old 26th November 2019, 11:41 PM   #16
Perry Babin is offline Perry Babin  United States
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5k. See attached for the original markings.
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File Type: jpg IMG_2617RockfordBDgainpot.jpg (129.6 KB, 18 views)
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Old 26th November 2019, 11:49 PM   #17
caraudioguy2100 is offline caraudioguy2100
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Is this the same for the T1500BDCP ?

Not the older 1501BD but the new style where The pot is on a card
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Old 27th November 2019, 03:13 AM   #18
Perry Babin is offline Perry Babin  United States
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The 6-terminal pot near the main board on the board with 2 pots is marked C20K.
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