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Old 18th March 2007, 09:39 AM   #1
roger-k is offline roger-k  Norway
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Default 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?
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Old 19th March 2007, 01:48 AM   #2
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2SK370's are coming from Toshiba, and they look to be an
excellent replacement.

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Old 19th March 2007, 01:51 AM   #3
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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
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Old 19th March 2007, 02:28 AM   #4
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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.
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Old 19th March 2007, 02:43 AM   #5
Irakli is offline Irakli  United States
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Just ordered 20 LS389B form Linear Systems distributor. They are $7.20 each. Quite pricy
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Old 19th March 2007, 03:05 AM   #6
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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
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Old 19th March 2007, 03:22 AM   #7
Irakli is offline Irakli  United States
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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 ?
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Old 20th March 2007, 05:18 PM   #8
roger-k is offline roger-k  Norway
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OK, folks. Thank you very much.
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