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Rockford Fosgate 2500.1bdcp, questions.
Rockford Fosgate 2500.1bdcp, questions.
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Old 16th March 2019, 02:27 AM   #71
rhempz01 is offline rhempz01  United States
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ok, will do
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Old 16th March 2019, 03:16 AM   #72
Perry Babin is offline Perry Babin  United States
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Why don't you have full supply voltage (12-15v) on the collectors of the NPN drivers?
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Old 16th March 2019, 06:48 AM   #73
rhempz01 is offline rhempz01  United States
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I do have 12.51vdc on them all.
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Old 16th March 2019, 06:59 AM   #74
rhempz01 is offline rhempz01  United States
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Current drive with a load. Im going to be using irfp064n for the power supply. I should use all 47ohm gate resistors as well?
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Old 16th March 2019, 08:48 AM   #75
Perry Babin is offline Perry Babin  United States
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Sean has repaired a lot more of these than I have so he may have a different opinion. I'd use the original values (half 60.4, the other half 47.5) all 47 ohms will likely be perfectly OK as well.
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Old 16th March 2019, 08:55 AM   #76
rhempz01 is offline rhempz01  United States
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Ill message him. Thanks perry.
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Old 16th March 2019, 06:51 PM   #77
rhempz01 is offline rhempz01  United States
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Perry despite my best efforts the power supply mosfets still overheat. If i attempt to power up the amplifier in the q6-q5-q4 location. The amplifir instantly drew 10amps of current and the mosfet in location q5 was hot within seconds? Shorted transformers?
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Old 16th March 2019, 07:27 PM   #78
rhempz01 is offline rhempz01  United States
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new mosfets and a drive signal looks good loaded down.
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Old 16th March 2019, 10:24 PM   #79
Perry Babin is offline Perry Babin  United States
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Post the waveform of the hottest FET, taken directly from the leg of the FET (not from any other point in the drive circuit). Do not connect B+ so there will be no excessive current draw.
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Old 16th March 2019, 11:04 PM   #80
rhempz01 is offline rhempz01  United States
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Hotest fet drive at the leg.
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