Can anyone give a thumbs up for the Fairchild FQP4N20L, for the Aleph 3, which is listed as the direct equivalent for the IRF9610? I have looked at the specs, but apart from Vdss, they seem quite different. As I need to match them, the price differential (4:1) makes the FQP quite attractive! Thoughts?
http://www.mouser.com/ds/2/149/FQP4N20L-348365.pdf
http://www.mouser.com/ds/2/149/FQP4N20L-348365.pdf
generally - if inter-electrode capacitances and xconductance are comparative (same ballpark) , parts are pretty much interchangeable
I/P Cap (240 vs 220), O/P Cap (36 vs 45), Reverse Transfer Cap (6 vs 16)....ballpark?
Can't find xconductance specs - do you work it out from Vgs?
Can't find xconductance specs - do you work it out from Vgs?
Hi number7,
The part you mentioned is an N-channel mosfet whereas
IRF9610 is a P-channel part.
A nice fairchild P channel part is FQP3P20.
Cheers,
Dennis
The part you mentioned is an N-channel mosfet whereas
IRF9610 is a P-channel part.
A nice fairchild P channel part is FQP3P20.
Cheers,
Dennis
If it's not too late, you might like to try 2sj313. This is what Papa recommended in the Aleph Design Reloaded thread. I think you might be able to get them from a couple of diyaudio members.
+1 for FQP3P20
I bought a tube of them (25 pieces) from Mouser last year to build my Aleph Mini. Not expensive, all were from the same batch, and I could easily find a number of very nice matches.
Aleph Mini played very well, nice sound, stable DC offset.
However, when I modified my Aleph this year to "J" variant by changing the FQP3P20 to LSJ74 bought in the diyAudio store, I liked the amp much more ... a much higher level of performance 😛
Best regards,
Claas
Did you read the The Aleph Design Reloaded thread I mentioned?
The answers to all your questions are there.
yes, I read it, no mention of the LSJ74. In fact, that article appeared to raise more questions than answers.
I see that a lot here. My interest in electronics is more of as a sub-system. Designing / making regulated power supply circuit boards etc is about my limit. To illustrate - I have just finished building a racing motorcycle, which involved the fabrication of many one-off parts using lathes / milling machines / welders etc. I do not have the time / energy / interest in the technical aspects of the vulcanizing process, I just need some tyres. It's great that people have different levels of knowledge and interest, but looking at Spice simulations in just not 'my thing'. Sorry 🙂
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