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VFET still available?

Discussion in 'Datasheets, Manuals or Parts' started by renzen, Nov 8, 2015.

  1. renzen

    renzen Member

    Joined:
    Jan 4, 2013
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    Hi,
    Does VFET still available? I want make simple class A headphone amplifier. What VFET should I use?
    Thanks.
     
  2. vtech

    vtech Member

    Joined:
    May 21, 2012
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    Atlanta, Ga
    Someone, somewhere may have a stock of exotic VFETs that are next to impossible to find.I do recall Sony's product line. From what I remember, VFETS were discontinued due to manufacturing costs as it did not take a hold in the industry.
    The main idea was to replicate a vacuum tube amplifier as close as possible. In my opinion, while it was very close, repairing a blown up VFET amplifier was another story. Nightmares of having to find matched pairs and biasing issues were common. A headphone amplifier using a VFET is way an overkill.
    Legendary Nelson Pass has an article about VFET,
    http://www.firstwatt.com/pdf/art_sony_vfet_40yr.pdf
     
    • Thanks Thanks x 1
  3. Mikebits

    Mikebits Well-Known Member

    Joined:
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    Location:
    San Diego, Ca
    I had never heard of a VFET until now. Those guitar audio guys sure do love their tube designs.
     

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