Mosfet question

mike49504 · 8th March 2010, 02:41 PM

Im working on a amp legacy and the power supply fets are blown.

They are using p60nf06 . Are theese the same as stp60n06?? Or whats a good replacement?

Perry Babin · 8th March 2010, 07:22 PM

The STP60NF06 has a much lower input capacitance than the STP60N06. The NF is available from Future Electronics. If you want a sub, you could probably use the IRFZ48.

What is the value of the gate resistors?

mike49504 · 16th March 2010, 11:03 PM

will 3205's or fqp65n06's work in this amp?

Perry Babin · 16th March 2010, 11:14 PM

What are they using to drive the FETs?

What value are the gate resistors?

mike49504 · 17th March 2010, 12:03 AM

The drivers they are using are C1815 and A1015

Gate resistors are 100 ohm

Perry Babin · 17th March 2010, 12:06 AM

If they're using an emitter follower pair as drivers you can use the 3205s if you reduce the value of the gate resistors to 47 ohms.

mike49504 · 17th March 2010, 02:58 AM

Ok the outputs are also toasted in this amp they are using 2SA1943's

Will the @sa1987's or the 2Sc5359's work instead?

Perry Babin · 17th March 2010, 03:09 AM

It appears that they're very similar. I'd expect them to work. Confirm that the idle current remains low when the amplifier is hot.

8th March 2010, 02:41 PM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Mosfet question Im working on a amp legacy and the power supply fets are blown. They are using p60nf06 . Are theese the same as stp60n06?? Or whats a good replacement?

8th March 2010, 07:22 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The STP60NF06 has a much lower input capacitance than the STP60N06. The NF is available from Future Electronics. If you want a sub, you could probably use the IRFZ48. What is the value of the gate resistors? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

16th March 2010, 11:14 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	What are they using to drive the FETs? What value are the gate resistors? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

17th March 2010, 12:06 AM	#6
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If they're using an emitter follower pair as drivers you can use the 3205s if you reduce the value of the gate resistors to 47 ohms. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

17th March 2010, 03:09 AM	#8
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	It appears that they're very similar. I'd expect them to work. Confirm that the idle current remains low when the amplifier is hot. __________________ 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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16th March 2010, 11:03 PM	#3
mike49504 diyAudio Member Join Date: Sep 2006	will 3205's or fqp65n06's work in this amp?

17th March 2010, 12:03 AM	#5
mike49504 diyAudio Member Join Date: Sep 2006	The drivers they are using are C1815 and A1015 Gate resistors are 100 ohm

17th March 2010, 02:58 AM	#7
mike49504 diyAudio Member Join Date: Sep 2006	Ok the outputs are also toasted in this amp they are using 2SA1943's Will the @sa1987's or the 2Sc5359's work instead?

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