2SK389 replacement

Hyldal · 20th August 2007, 07:40 AM

Do anyone know of another dualfet that can replace a 2SK389. It does not have to be the same package. I have looked at 2SK2145 and 2SK2145, SMD parts from Toshiba, but they semes also to be har d to find. Does anyone know are they also about to be obsolite?

acid_k2 · 20th August 2007, 11:14 AM

A replacement for Toshiba's discontinued 2SK389 is available from Linear Integrated Systems.

Try finding LSK389

Hyldal · 20th August 2007, 01:58 PM

Thank you for the input. If others have a good dual fet to recommend, I would like to know. to have as many alternatives as possible.

BrianL · 24th August 2007, 04:38 AM

You do not have a whole lot of options. In general, discrete semiconductors, especially small-signal units, are decreasing in availability and variety. Small-signal FETs have always been a niche market and are are more so these days. Linear Systems seems to be surviving by re-creating defunct but unique-and-useful discretes, much like Oliver Q. Germanium did 20 years ago, and have picked up the 2SK389. Ten years ago there were not that many duals available, and there are even less today. Don't think you'll have a dozen different p/n's to choose from.

Be happy if you can purchase LSK389's for low-noise duals

Roar Malmin · 26th August 2007, 09:39 PM

Do you need many? I have them in GR, BL and V versions.

Roar

Ryssen · 2nd September 2007, 07:00 PM

Quote:

Try finding LSK389

There are samples..

Roar Malmin · 2nd September 2007, 08:24 PM

Sorry if I were unclear. I have original Toshiba 2SK389/2SJ109 in GR, BL and V versions.

vmoreau · 16th November 2007, 06:15 PM

Hello Roar Malmin,

I'm a newbie in this forum and would like to start a DIY project (diff preamp) based on Toshiba 2SK389/2SJ109 FET pairs.
I have found your post which is quite old... but I can't mail you for the moment (forum restriction for newbies).
Do you still have some 2SK389/2SJ109 to sell ? What would be the prices for each grade.
Thanks.
Hope to get some news soon !
Vincent

t_blizzard · 29th November 2007, 10:41 PM

Vishay has dual fets.
They can be found at:
http://www.vishay.com/fets-small-signal/SSFsgdnchjP/

t_blizzard · 30th November 2007, 03:35 AM

Quote:

Originally posted by Hyldal
Thank you for the input. If others have a good dual fet to recommend, I would like to know. to have as many alternatives as possible.

Vishay offers dual fets like the U404 and U406.

20th August 2007, 07:40 AM	#1
Hyldal diyAudio Member Join Date: Sep 2006	2SK389 replacement Do anyone know of another dualfet that can replace a 2SK389. It does not have to be the same package. I have looked at 2SK2145 and 2SK2145, SMD parts from Toshiba, but they semes also to be har d to find. Does anyone know are they also about to be obsolite?

24th August 2007, 04:38 AM	#4
BrianL diyAudio Member Join Date: Mar 2002 Location: USA	You do not have a whole lot of options. In general, discrete semiconductors, especially small-signal units, are decreasing in availability and variety. Small-signal FETs have always been a niche market and are are more so these days. Linear Systems seems to be surviving by re-creating defunct but unique-and-useful discretes, much like Oliver Q. Germanium did 20 years ago, and have picked up the 2SK389. Ten years ago there were not that many duals available, and there are even less today. Don't think you'll have a dozen different p/n's to choose from. Be happy if you can purchase LSK389's for low-noise duals __________________ bel

2nd September 2007, 08:24 PM	#7
Roar Malmin diyAudio Member Join Date: Jul 2006	2SK389/2SJ109 Sorry if I were unclear. I have original Toshiba 2SK389/2SJ109 in GR, BL and V versions.

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20th August 2007, 11:14 AM	#2
acid_k2 diyAudio Member Join Date: Oct 2006	A replacement for Toshiba's discontinued 2SK389 is available from Linear Integrated Systems. Try finding LSK389

20th August 2007, 01:58 PM	#3
Hyldal diyAudio Member Join Date: Sep 2006	Thank you for the input. If others have a good dual fet to recommend, I would like to know. to have as many alternatives as possible.

26th August 2007, 09:39 PM	#5
Roar Malmin diyAudio Member Join Date: Jul 2006	Do you need many? I have them in GR, BL and V versions. Roar

16th November 2007, 06:15 PM	#8
vmoreau diyAudio Member Join Date: Nov 2007	Hello Roar Malmin, I'm a newbie in this forum and would like to start a DIY project (diff preamp) based on Toshiba 2SK389/2SJ109 FET pairs. I have found your post which is quite old... but I can't mail you for the moment (forum restriction for newbies). Do you still have some 2SK389/2SJ109 to sell ? What would be the prices for each grade. Thanks. Hope to get some news soon ! Vincent

29th November 2007, 10:41 PM	#9
t_blizzard diyAudio Member Join Date: Nov 2007	Vishay has dual fets. They can be found at: http://www.vishay.com/fets-small-signal/SSFsgdnchjP/

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