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Old 15th March 2006, 10:44 PM   #1
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Default Low noise dual JFET pair

I've seen these parts in similar threads before, but I'm having a hard time locating them:

I'm looking for a dual matched low noise JFET IC for the input of an audio amp. The part that keeps coming up is the LSK389, but I can't seem to find it in small quantities (I would really only need about three of them).

Does anyone know where I can find a low noise dual jfet pair (not just the LSK389) in the USA?
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Old 15th March 2006, 11:59 PM   #2
anatech is offline anatech  Canada
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Hi rtarbell,
Look for 2SK389. Google should cough up some sources, also search the trading post.

-Chris
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Old 16th March 2006, 01:27 AM   #3
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Default jFETS

You need to fit the transistor to the application. The 2SK389 is quiet, really two 2SK170's in the same case for temp drift control.
For higher current uses the 2N5566 is great, it can handle at least three times what the 389 can do. There is a source for these on ebay right now. The price at Mouser and Newark has almost tripled lately.
Both a N channel, the match for the 2SK389 is the 2SJ109. Now that is getting to be a rare one.
It would be hard to beat any of these three in the proper application.
Good luck!

George
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Old 17th March 2006, 06:50 AM   #4
AndrewT is online now AndrewT  Scotland
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Hi,
there is a current production version, US I think, but only available in Nchannel.
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regards Andrew T.
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Old 17th March 2006, 10:11 PM   #5
Onra is offline Onra  Germany
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Hi,
have a look at
http://www.interfet.com/jfet.htm
http://www.crystalonics.com/home.htm (donīt get shocked by their price list)
http://www.vishay.com/fets-small-signal/
or
http://www.linearsystems.com/products.html#GlossD
Onra
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