VFET747
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Apr 6, 2018
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VFET747

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VFET747 was last seen:
Apr 6, 2018
    1. VFET747
      VFET747
      HI Everyone, my pilot sp 210 tube pre-amp has loud hum in it, a new custom made power supply was built for it recently , which have full wave rectifiers in both high voltage supply and low voltage supply for the tube heater filaments, all new coupling capacitors, but it still hum in both channels which is quite loud , what might be causing the hum, any help will be much appreciated, thanks
    2. VFET747
      VFET747
      HI Everyone, my pilot sp 210 tube pre-amp has loud hum in it, a new custom made power supply was built for which have full wave rectifiers in both high voltage and low voltage for the filament, all new capacitors but it still hum in both channels , what might be causing the hum, any help will be much appreciated, thanks
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