IRF540N in place of IRF540 in MTX Thunder 2300

spooney · 24th February 2010, 02:42 AM

Has anybody ran into or heard of any problems using IRF540N in place of IRF540 as outputs in an MTX Thunder 2300 or similiar series amplifier. Everybody seems to be out of the IRF540 right now. Is there any other suffix IRF540 that is known to work better?

Perry Babin · 24th February 2010, 04:03 AM

The IRF540A has been a good transistor in all amps that I've used them in but I can't remember if I used them in any MTX amps.

IRF540A Fairchild Semiconductor MOSFETs

spooney · 24th February 2010, 04:41 AM

i will check into those thanks Perry

81bas · 25th February 2010, 08:33 AM

Quote:

Originally Posted by spooney

Has anybody ran into or heard of any problems using IRF540N in place of IRF540 as outputs in an MTX Thunder 2300 or similiar series amplifier. Everybody seems to be out of the IRF540 right now. Is there any other suffix IRF540 that is known to work better?

IRF540N has even better characteristics than IRF540, less Rdson, faster switching. Should be no problem to use this.

spooney · 05:29 AM

I know on paper its a better part but I worked on a rockford amp that did all kinds of weird things with IRF540N's in it. When I put in the IRF540 all the issues went away. I've got some IRF540A's on the way(found a great price on them) to try and ressurect this thing. I will report back and let everyone know how they work out.

elly · 26th February 2010, 10:05 AM

Did anyone tell me what different valve amp with regular amp (car audio) now im using Brax 2400.4 GE, plan to change with HSS fidelity HT 240, sound was amazing,but some people told me valve amp not suitable to car sounding coz of vibration.

spooney · 12th March 2010, 09:38 PM

Just wanted to let everyone know that the IRF540A worked great in this amp as a replacement. No modifications were necessary to make it work in the channel of this amp that I replaced.

1moreamp · 13th March 2010, 02:13 AM

Quote:

Originally Posted by spooney

Just wanted to let everyone know that the IRF540A worked great in this amp as a replacement. No modifications were necessary to make it work in the channel of this amp that I replaced.

Ahhh live and learn I guess. Fets can vary a bunch from maker to maker and process to process. What looks good on paper does NOT always work out well. PDF files are salesman's tools and a approximate document at best. Some circuitry just can not be altered without odd things happening. Glad to hear you got it all worked out John..

I have a apple box full of different brand and type Mosfets just because of the issues you have described in this post. One of these days I am gonna sell that apple box full of fets and make some tech very happy....

24th February 2010, 02:42 AM	#1
spooney diyAudio Member Join Date: Dec 2006	IRF540N in place of IRF540 in MTX Thunder 2300 Has anybody ran into or heard of any problems using IRF540N in place of IRF540 as outputs in an MTX Thunder 2300 or similiar series amplifier. Everybody seems to be out of the IRF540 right now. Is there any other suffix IRF540 that is known to work better?

24th February 2010, 04:03 AM	#2
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	The IRF540A has been a good transistor in all amps that I've used them in but I can't remember if I used them in any MTX amps. IRF540A Fairchild Semiconductor MOSFETs __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

26th February 2010, 05:27 AM	#5
spooney diyAudio Member Join Date: Dec 2006	I know on paper its a better part but I worked on a rockford amp that did all kinds of weird things with IRF540N's in it. When I put in the IRF540 all the issues went away. I've got some IRF540A's on the way(found a great price on them) to try and ressurect this thing. I will report back and let everyone know how they work out. Last edited by spooney; 26th February 2010 at 05:29 AM.

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24th February 2010, 04:41 AM	#3
spooney diyAudio Member Join Date: Dec 2006	i will check into those thanks Perry

26th February 2010, 10:05 AM	#6
elly diyAudio Member Join Date: Feb 2010	Did anyone tell me what different valve amp with regular amp (car audio) now im using Brax 2400.4 GE, plan to change with HSS fidelity HT 240, sound was amazing,but some people told me valve amp not suitable to car sounding coz of vibration.

12th March 2010, 09:38 PM	#7
spooney diyAudio Member Join Date: Dec 2006	Just wanted to let everyone know that the IRF540A worked great in this amp as a replacement. No modifications were necessary to make it work in the channel of this amp that I replaced.

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