Replacement for 2SK389BL?

roger-k · 18th March 2007, 08:39 AM

I will make The Pearl Phono. Usually I draw the PCB and etch it by myself. The 2SK389BL can sometimes be hard to get, so now I have the opportunity to insert a replacement for this.

Is there any replacement for this?
How will it be to use two 2SK170BL (or maybe others) in parallel and a 20 ohm resistor in series with each of them, similar to the first gain stage?

Nelson Pass · 19th March 2007, 12:48 AM

2SK370's are coming from Toshiba, and they look to be an
excellent replacement.

hifimaker · 19th March 2007, 12:51 AM

Also Linear Systems has replacements.

The 2SK389 and 2SK170 are both available from LinearSystems in Fremont California:
http://www.linearsystems.com

LSK170:
http://www.linearsystems.com/datasheets/LSK170.pdf

LSK389:
http://www.linearsystems.com/datasheets/LSK389.pdf

Both are available in the three traditional current versions: A, B, and C.

-David

jackinnj · 19th March 2007, 01:28 AM

Quote:

Originally posted by Nelson Pass
2SK370's are coming from Toshiba, and they look to be an
excellent replacement.

Isn't that a single? I see 2SK2145 and 2SK3320 duals in the Toshiba lineup but their noise figures are 10x higher.

Irakli · 19th March 2007, 01:43 AM

Just ordered 20 LS389B form Linear Systems distributor. They are $7.20 each. Quite pricy

LineSource · 19th March 2007, 02:05 AM

Quote:

Originally posted by Irakli
Just ordered 20 LS389B form Linear Systems distributor. They are $7.20 each. Quite pricy

What bias current are you using on the LS389B?

The "B" grade is spec'ed at I_DDS 6-12ma at Vds=10V.

Just want to get a rule of thumb..... Thanks

Irakli · 19th March 2007, 02:22 AM

Quote:

What bias current are you using on the LS389B?

The "B" grade is spec'ed at I_DDS 6-12ma at Vds=10V.

Just want to get a rule of thumb..... Thanks

Isn't 6-12 mA I_DDS the same for 2SK389BL ?

roger-k · 20th March 2007, 04:18 PM

OK, folks. Thank you very much.

18th March 2007, 08:39 AM	#1
roger-k diyAudio Member Join Date: Mar 2004 Location: Karmøy in Norway	Replacement for 2SK389BL? I will make The Pearl Phono. Usually I draw the PCB and etch it by myself. The 2SK389BL can sometimes be hard to get, so now I have the opportunity to insert a replacement for this. Is there any replacement for this? How will it be to use two 2SK170BL (or maybe others) in parallel and a 20 ohm resistor in series with each of them, similar to the first gain stage? __________________ Roger

20th March 2007, 04:18 PM	#8
roger-k diyAudio Member Join Date: Mar 2004 Location: Karmøy in Norway	OK, folks. Thank you very much. __________________ Roger

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19th March 2007, 12:48 AM	#2
Nelson Pass The one and only Join Date: Mar 2001	2SK370's are coming from Toshiba, and they look to be an excellent replacement.

19th March 2007, 12:51 AM	#3
hifimaker diyAudio Member Join Date: Oct 2003 Location: San Jose	Also Linear Systems has replacements. The 2SK389 and 2SK170 are both available from LinearSystems in Fremont California: http://www.linearsystems.com LSK170: http://www.linearsystems.com/datasheets/LSK170.pdf LSK389: http://www.linearsystems.com/datasheets/LSK389.pdf Both are available in the three traditional current versions: A, B, and C. -David

19th March 2007, 01:43 AM	#5
Irakli diyAudio Member Join Date: Aug 2004 Location: washington, DC Blog Entries: 1	Just ordered 20 LS389B form Linear Systems distributor. They are $7.20 each. Quite pricy

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