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vfets

  1. MattiaM

    Sony TA-5650 loud pop at power-off

    I recently refurbished a Sony TA-5650 v-fet, with a full recap, replacement of the killer diodes, addition of the voltage doubler on the power supply and replacement of the speaker relay. Bias adjusted fine at 50mV and the DC offset at the speaker output is about 2-3mv on one channel, and 15mV...
    • MattiaM
    • Thread
    • pop noise on shutdown sony vfets
    • Replies: 8
    • Forum: Solid State
  2. L

    YAMAHA B-2 VFETS

    Gentlemen, I am reforming a B-2 and would be very happy if I could count on the help of the most experienced in this task. I would like some modifications and a lot of help to find the power transistors vftes (2SK76 and 2SJ26). Thank you
    • Leonardo G
    • Thread
    • 2sj26 2sk76 vfets yamaha b-2
    • Replies: 23
    • Forum: Yamaha
  3. MattiaM

    Sony TA-8650 bias adjustment

    Since there is no unique source of information on the bias for the Sony TA-8650, with no mention of changes from the 125mV in the original Sony Service manual in any service bulletin, and rumors from a Japanese forum of a required new value of 30/40mV, I decided to do a quick and by no means...
    • MattiaM
    • Thread
    • bias adjustement distortion sony vfets ta-8650 vfet vfets
    • Replies: 8
    • Forum: Solid State
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