crossfire amp

mike49504 · 12th January 2010, 05:00 AM

Im rebuilding the power supply in this amp. The big diode in it is marked mr851
Wondering if i can replace it with a 1n5407g or 1n5408?

Perry Babin · 12th January 2010, 06:59 AM

It depends on the application. The 851 is a fast recovery diode and the others are not. If the application requires fast switching, the ones you listed may overheat and fail.

Where are they being used?

What model amp?

mike49504 · 12th January 2010, 07:41 AM

Its the big diode behind the power and ground connections on the amp the modle is cfa302

Perry Babin · 12th January 2010, 07:46 AM

If the striped end is connected to B+ and the other end is connected to ground, your diodes will work.

mike49504 · 12th January 2010, 07:49 AM

yes stripped is connected to b+ other end to ground

12th January 2010, 05:00 AM	#1
mike49504 diyAudio Member Join Date: Sep 2006	crossfire amp Im rebuilding the power supply in this amp. The big diode in it is marked mr851 Wondering if i can replace it with a 1n5407g or 1n5408?

12th January 2010, 06:59 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	It depends on the application. The 851 is a fast recovery diode and the others are not. If the application requires fast switching, the ones you listed may overheat and fail. Where are they being used? What model amp? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

12th January 2010, 07:46 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If the striped end is connected to B+ and the other end is connected to ground, your diodes will work. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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12th January 2010, 07:41 AM	#3
mike49504 diyAudio Member Join Date: Sep 2006	Its the big diode behind the power and ground connections on the amp the modle is cfa302

12th January 2010, 07:49 AM	#5
mike49504 diyAudio Member Join Date: Sep 2006	yes stripped is connected to b+ other end to ground

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