ultimate mosfets for aleph 4?

hifi · 3rd June 2001, 02:42 PM

which shoudl i choose....i have bounced this question back and forth now....

IRFP140
IRFP240
IRFP250

wich would be the best for alpeph 4 (in your opinion) or shold i go for something else??

micke

Petter · 3rd June 2001, 05:01 PM

The Master uses IRFP240 or derivatives thereof.

If you pick of MJ Audio Musings or something like that (Japanese mag, only found it once), you will see a lot of references to other more esoteric devices. Harris Ultrafets etc.

Perversely, you should look for devices which have a relatively high on-resistance (due to lower input capacitance). Naturally big package and low thermal resistance is a bonus.

Nelson Pass (The Master) has commented on this in another thread recently.

Petter

3rd June 2001, 05:01 PM	#2
Petter diyAudio Member Join Date: Jan 2001 Location: Scandinavia	Do what the Master says The Master uses IRFP240 or derivatives thereof. If you pick of MJ Audio Musings or something like that (Japanese mag, only found it once), you will see a lot of references to other more esoteric devices. Harris Ultrafets etc. Perversely, you should look for devices which have a relatively high on-resistance (due to lower input capacitance). Naturally big package and low thermal resistance is a bonus. Nelson Pass (The Master) has commented on this in another thread recently. Petter

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3rd June 2001, 02:42 PM	#1
hifi diyAudio Member Join Date: Mar 2001 Location: sweden	which shoudl i choose....i have bounced this question back and forth now.... IRFP140 IRFP240 IRFP250 wich would be the best for alpeph 4 (in your opinion) or shold i go for something else?? micke