Ppi a600

mike49504 · 17th March 2010, 05:27 AM

The power supplyu in this amp is blown. The fets in it are SMP25N06.

Is there a good replacement (sub) for theese?

Also what ohm resistors are they using for the gates. Since evryone in this amp is toast

Perry Babin · 17th March 2010, 06:19 AM

The gate resistors are 100 ohms, most likely. I'd try the IRFZ44. The IRFZ34 is generally a drop-in replacement for the 25N06s but The Z44 should be OK. If you use the Z44s, monitor the temperature of the power supply FETs for about a minute after replacing them. If they remain cool, you shouldn't have to make any other changes.

mike49504 · 20th March 2010, 10:47 PM

The NDP7060's wouldnt work would they?

Perry Babin · 21st March 2010, 01:44 AM

If I'm not mistaken, the driver IC drives the FETs directly. I don't know if it can reliably drive 8 7060s. Long term reliably could be a problem.

17th March 2010, 05:27 AM	#1
mike49504 diyAudio Member Join Date: Sep 2006	Ppi a600 The power supplyu in this amp is blown. The fets in it are SMP25N06. Is there a good replacement (sub) for theese? Also what ohm resistors are they using for the gates. Since evryone in this amp is toast

17th March 2010, 06:19 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The gate resistors are 100 ohms, most likely. I'd try the IRFZ44. The IRFZ34 is generally a drop-in replacement for the 25N06s but The Z44 should be OK. If you use the Z44s, monitor the temperature of the power supply FETs for about a minute after replacing them. If they remain cool, you shouldn't have to make any other changes. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

21st March 2010, 01:44 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If I'm not mistaken, the driver IC drives the FETs directly. I don't know if it can reliably drive 8 7060s. Long term reliably could be a problem. __________________ 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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20th March 2010, 10:47 PM	#3
mike49504 diyAudio Member Join Date: Sep 2006	The NDP7060's wouldnt work would they?

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