Tweaker's Asylum

J-Fet's 2SK170 & 2SJ74 question - John Curl ?

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Jari vihanto

I'm asking on behalf of my father, if there's any other J-Fet's you can recommend to be used with RIAA stages. We've browsed thru every manufacturers web sites, and before mentioned J-Fet's seem to be the only ones suitable. My father has always used bipolars in his designs, and his experience with J-Fet's is limited, but that seems to be the way to go with pre-amp stages.
Thank you in advance for any information.

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Re: J-Fet's 2SK170 & 2SJ74 question - John Curl ? john curl 11:45:37 02/20/01 (4)
The only other parts that I would generally recommend are: 2SK289 and 2SJ109 matched pairs. Many of the best FETs are not available for sale to the public, anymore.
- Re: J-Fet's 2SK170 & 2SJ74 question - John Curl ? mgreene 16:53:44 02/21/01 (0)
  Hi John,
  I'm curious, what types of FET's are you referring to? Are these mil-spec parts or just parts that require large minimum orders.
- Re: J-Fet's 2SK170 & 2SJ74 question - John Curl ? RonS 12:22:32 02/20/01 (0)
  MCM has 2SK170/2SK389/2SJ74/2SJ109. Some of these are back ordered (I ordered all of their K389's!). I don't know what grade these will be, have to wait till they show up. My K389/J74's should be here any day, the K170's early April. Borbely Audio also sells these parts.
  RonS
- Typo time jcarr 11:58:41 02/20/01 (1)
  John,
  Don't you mean the 2SK389 & 2SJ109 pairs? Both by Toshiba.
  kind regards ;-)
  jonathan carr
  - Re: Typo time john curl 18:45:31 02/20/01 (0)
    Thanks Jonathan: I meant the 2sk389.

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