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Mosfet replacment
Mosfet replacment
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Old 21st September 2008, 07:02 PM   #11
jkeny is offline jkeny  Ireland
Join Date: Feb 2007
Location: Dublin
I'm looking for two pair of matched 2SK1058 if you want to sell (see other 2SK1058 threads) - PM me if interested?
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Old 21st September 2008, 07:05 PM   #12
EUVL is offline EUVL  Europe
diyAudio Member
Join Date: Oct 2003
You can do direct replacement in F5 and it will work.

However, to get the most (min distortion) out of the Toshiba's MOSFETs complementary properties in the F5, you may consider :

1) using 2SK170 with Idss of 6.3mA, and 2SK74 with Idss of 7.3mA;
2) replace R2 with 15R, and R6, R8 with 150R 3W.

For details please refer to my posts in the F5 thread.

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Old 22nd September 2008, 12:18 AM   #13
gaborbela is offline gaborbela  Canada
diyAudio Member
Join Date: Sep 2005
Default Hi Lineup

What about these 10W SE amplifier you posted at the forum design by Widowmaker . I could use some 2SK1529 in that amp .
Do you have the lay out for the PC board , that is the orig schematic or some parts was replaced ?
If I spent so much money because I read those are lateral mosfet (I purchased 11 pair)at least I could use them some how .
Please let me know


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Old 14th December 2008, 10:16 PM   #14
umut1001 is offline umut1001  Europe
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Join Date: Mar 2007
Location: Istanbul
Default hi EUVL

hi EUVL..i will built an f5 amp tomorrow..i hope so..but i dont have fairchild output mosfets..i have irfps..nelson says 9240 makes distortion..i have 2sk1530/j201..can i use them instead of irfps?i am asking it because i see toshibas has lower gate voltages..do i have to change any resistor values in the circuit for this design? thanks..
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