Crunch Ground Pounder 3000 Pro

m4ick · 25th January 2012, 11:52 PM

Does anyone know the value of the power supply gate resistors for this amp? They're pretty well charred.

Perry Babin · 26th January 2012, 12:54 AM

If they're using IRFP064s in the supply, they may be 22 ohms. That's what's used in an amp that appears to be closely related.

mike49504 · 26th January 2012, 02:38 AM

They are 47 ohms gate resistors

Perry Babin · 26th January 2012, 06:49 AM

Generally, even if they all appear to be burned, quite a few will be within tolerance and can tell you what they were. Of course, you must measure the value after removing the FETs or the resistors from the circuit.

m4ick · 4th February 2012, 10:56 PM

They test 47ohms, what's CRAZY is that the way they are discolored, the look EXACTLY to be brown, black, black, gold (10ohms). Yet they check 47ohms, yellow, violet, black. gold.

Thanks to you both, you were both right.

25th January 2012, 11:52 PM	#1
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	Crunch Ground Pounder 3000 Pro Does anyone know the value of the power supply gate resistors for this amp? They're pretty well charred. __________________ Scope - DMM - 460W Computer PSU - Tutorial

26th January 2012, 12:54 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	If they're using IRFP064s in the supply, they may be 22 ohms. That's what's used in an amp that appears to be closely related. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

26th January 2012, 06:49 AM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Generally, even if they all appear to be burned, quite a few will be within tolerance and can tell you what they were. Of course, you must measure the value after removing the FETs or the resistors from the circuit. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

4th February 2012, 10:56 PM	#5
m4ick diyAudio Member Join Date: Jan 2010 Location: Gainesville, FL	They test 47ohms, what's CRAZY is that the way they are discolored, the look EXACTLY to be brown, black, black, gold (10ohms). Yet they check 47ohms, yellow, violet, black. gold. Thanks to you both, you were both right. __________________ Scope - DMM - 460W Computer PSU - Tutorial

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26th January 2012, 02:38 AM	#3
mike49504 diyAudio Member Join Date: Sep 2006	They are 47 ohms gate resistors

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