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sony vfets

  1. spaghetti

    Sony TA-N7 maintenance

    I recently pulled the trigger on this amp, I was looking for a new VFET amp to add to the collection, and I was eventually able to find this one for a reasonable price. Unfortunately, since the local European version is generally too expensive for my pockets, I decided to buy the 100V Japanese...
  2. 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
  3. MattiaM

    Sony TA-5650 V-FET high pitch annoying noise

    Hello, I just completed (or so I thought) the restoration of a Sony TA-5650. I am a novice in electronics, and this is one of my first restorations. I replaced the kilelr diodes, added the voltage doubler mod for the power supply, replaced the transistor that control the DC offset, recapped it...
    • MattiaM
    • Thread
    • sony sony ta-5650 sony vfets ta-5650 vfet
    • Replies: 18
    • Forum: Solid State
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