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Ed

Summary:
The Stradi Ed reproduces Valvo's Ed in a modern way.


The Ed tube is considered as the industrial version of the AD1.

The Ed tube’s BASE is Post 7 Pin(P7), which, as its name suggests, was mainly used in the telecommunication field. However, when used for audio, the sound was very good, so it tends to be the best among European direct-heated triodes.

The Stradi Ed reproduces Valvo's Ed in a modern way, but the company's unique microphonic reduction and filament end-loss reduction structures are applied.

To minimize microphonic and distortion, which can be a problem in sound reproduction in audio, we apply a Ladder-Type FrameGrid. It makes the sounds clearer and better so that you can fully enjoy your music.


Available in matched pairs, quad sets, and singles.

  • Availability In Stock
  • Lead Time 3 ~ 14 days
  • Price$600.00
FEATURES

  • Ladder type Frame Grid
  • Material of minimizing filament end-loss
  • Anti-microphonic structure
  • Electrophoresis filament coating
  • Dual Getters
  • Eco-friendly paper packaging


FILAMENT RATINGS

  • Filament Voltage : 4 Volt (AC or DC)
  • Tolerance on filament voltage : +-2.5 %
  • Filament Current : 1.2 Ampere


MAXIMUM RATINGS

  • Maximum Anode Voltage : 300V
  • Maximum Anode Dissipation : 20Watt
  • Maximum Anode Current : 80mA


RECOMMENDED SINGLE ENDED OPERATING POINTS

  • Anode Supply Voltage : 250V
  • Grid Voltage : -45V
  • Anode Current : 60mA
  • Transconductance : 6000 µmhos
  • Anode Resistance : 670 Ω
  • Amplification factor : 4.0
  • Load Resistance : 2500 Ω
  • Power Output : 4.0Watt


TUBE CURVES


DIMENSIONS & BASE