Power Acoustik LT1440/2

spooney · 26th March 2011, 06:20 AM

Working on this amp and the outputs and power supply are blown. Original power supply fets were IRFZ44N with 100 ohm gate resistors. I have some FQP50N06's on hand that I plan on using as replacements for the power supply fets. Will 100 ohm gate resistors work with these fets? I think the drivers for the power supply are OK. The outputs in this amp are 2SC4467 and 2SA1694. Will FJA4213 and FJA4313 work good as substitutes? If they won't is there something else that may do the trick? Unsure if the drivers for the outputs are still good and I have not even looked to see what those are. Lastly there were no spring clips for the fets in this amp when I received it. Does anyone know of a source for these? I can probably make my own clamp downs but it will involve a lot of cutting,drilling,and tapping. I'd just as soon shell out the money for the clips if they can be found.

Perry Babin · 26th March 2011, 03:36 PM

Those power supply and output transistors should work without any problems.

As far as I know, there is no source for the clips.

spooney · 26th March 2011, 07:34 PM

It looks like I have shorted drivers in the output section. They are using KTD600K and KTB631K for drivers. Will KSA1220 and KSC2690 work as subs for these?

Perry Babin · 26th March 2011, 07:41 PM

They should.

26th March 2011, 06:20 AM	#1
spooney diyAudio Member Join Date: Dec 2006	Power Acoustik LT1440/2 Working on this amp and the outputs and power supply are blown. Original power supply fets were IRFZ44N with 100 ohm gate resistors. I have some FQP50N06's on hand that I plan on using as replacements for the power supply fets. Will 100 ohm gate resistors work with these fets? I think the drivers for the power supply are OK. The outputs in this amp are 2SC4467 and 2SA1694. Will FJA4213 and FJA4313 work good as substitutes? If they won't is there something else that may do the trick? Unsure if the drivers for the outputs are still good and I have not even looked to see what those are. Lastly there were no spring clips for the fets in this amp when I received it. Does anyone know of a source for these? I can probably make my own clamp downs but it will involve a lot of cutting,drilling,and tapping. I'd just as soon shell out the money for the clips if they can be found.

26th March 2011, 03:36 PM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Those power supply and output transistors should work without any problems. As far as I know, there is no source for the clips. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

26th March 2011, 07:41 PM	#4
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	They should. __________________ 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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26th March 2011, 07:34 PM	#3
spooney diyAudio Member Join Date: Dec 2006	It looks like I have shorted drivers in the output section. They are using KTD600K and KTB631K for drivers. Will KSA1220 and KSC2690 work as subs for these?

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