IRF540N in place of IRF540 in MTX Thunder 2300 - diyAudio
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Old 24th February 2010, 02:42 AM   #1
spooney is offline spooney  United States
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Default 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?
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Old 24th February 2010, 04:03 AM   #2
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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
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Old 24th February 2010, 04:41 AM   #3
spooney is offline spooney  United States
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i will check into those thanks Perry
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Old 25th February 2010, 08:33 AM   #4
81bas is offline 81bas  Germany
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Quote:
Originally Posted by spooney View Post
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.
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Old 26th February 2010, 05:27 AM   #5
spooney is offline spooney  United States
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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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Old 26th February 2010, 10:05 AM   #6
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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.
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Old 12th March 2010, 09:38 PM   #7
spooney is offline spooney  United States
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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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Old 13th March 2010, 02:13 AM   #8
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Originally Posted by spooney View Post
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....
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