OnSemi FETs?

Khron · 1st February 2008, 08:50 PM

Has anyone used OnSemi power mosfets for an Aleph?

I've recently ordered 10pc of MTW32N20E (32A, 200V), along with some other stuff, to possibly replace the IRFP260N in the mini-Aleph J i'm putting together as a headphone amp. The specs look nearly identical.

Any reasons they might not sound properly / good?

steenoe · 1st February 2008, 09:06 PM

For an Aleph amp, the CiSS value is of specific interest! The lower the better. All the On Semi's i have looked at, were useless.
Its pretty nice to have them as free samples though

flg · 1st February 2008, 10:13 PM

I agree

I worked there once upon a time...

Khron · 2nd February 2008, 03:13 AM

Ciss for the OnSemi is specced as 3600 (typ) / 5000 (max) pF, as opposed to the 4057 (typ) for the IRFP260N. Comparable, i'd say

mpmarino · 2nd February 2008, 10:17 AM

Quote:

Originally posted by Khron
Ciss for the OnSemi is specced as 3600 (typ) / 5000 (max) pF, as opposed to the 4057 (typ) for the IRFP260N. Comparable, i'd say

Perhaps, but it's the IRFP240 you should compare with, as it is what Pass specs.

steenoe · 2nd February 2008, 01:04 PM

Quote:

Originally posted by mpmarino

Perhaps, but it's the IRFP240 you should compare with, as it is what Pass specs.

Excactly.

The most usefull Onsemi fets (for Pass projects) are the TO220's MTP10N and MTP12P. They are very nice for a BosoZ type PSU. (Drop in replacement) Ofcourse, they carry the J310 also, which gained some popularity lately

GRollins · 4th February 2008, 12:20 AM

Don't assume higher capacitance is always a bad thing. I've had at least one circumstance where the higher capacitance part sounded better.

Grey

Nelson Pass · 4th February 2008, 12:34 AM

If you prefer big bottom...

Blues · 4th February 2008, 04:26 AM

Big Bottom...

wrenchone · 4th February 2008, 04:35 AM

I was thinking more of Spinal Tap, but then, I'm a rude person.

1st February 2008, 08:50 PM	#1
Khron diyAudio Member Join Date: Jul 2005 Location: Finland	OnSemi FETs? Has anyone used OnSemi power mosfets for an Aleph? I've recently ordered 10pc of MTW32N20E (32A, 200V), along with some other stuff, to possibly replace the IRFP260N in the mini-Aleph J i'm putting together as a headphone amp. The specs look nearly identical. Any reasons they might not sound properly / good?

4th February 2008, 04:26 AM	#9
Blues Lightning In A Bottle diyAudio Member Join Date: Sep 2003 Location: Bremerton, WA	Quoting Jaccovity Big Bottom... __________________ Quad Matched Toshiba 2SK1530/2SJ201 MOSFETs http://www.diyaudio.com/forums/swap-...ml#post2086375

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1st February 2008, 09:06 PM	#2
steenoe diyAudio Member Join Date: Mar 2004	For an Aleph amp, the CiSS value is of specific interest! The lower the better. All the On Semi's i have looked at, were useless. Its pretty nice to have them as free samples though

1st February 2008, 10:13 PM	#3
flg diyAudio Member Join Date: Jul 2005 Location: North East	I agree I worked there once upon a time...

2nd February 2008, 03:13 AM	#4
Khron diyAudio Member Join Date: Jul 2005 Location: Finland	Ciss for the OnSemi is specced as 3600 (typ) / 5000 (max) pF, as opposed to the 4057 (typ) for the IRFP260N. Comparable, i'd say

4th February 2008, 12:20 AM	#7
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Don't assume higher capacitance is always a bad thing. I've had at least one circumstance where the higher capacitance part sounded better. Grey

4th February 2008, 12:34 AM	#8
Nelson Pass The one and only Join Date: Mar 2001	If you prefer big bottom...

4th February 2008, 04:35 AM	#10
wrenchone diyAudio Member Join Date: Feb 2004 Location: Silicon Valley	I was thinking more of Spinal Tap, but then, I'm a rude person.

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