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Ray Tubes SELECT 300B

Matched Sets: Pair
Regular price $481.00
Regular price Sale price $481.00
In store purchase only

DESCRIPTION

The Ray Tubes SELECT 300B is a hand-selected classic audio tube offering expressive and musical sound performance. Built with gold pins and held to rigorous quality standards, this 300B delivers lush midrange, refined highs, and controlled bass, making it a favorite for high-end single-ended tube amplifiers. 

Technical Specifications

  • Tube Type: 300B
  • Tube Socket: 4-pin
  • Filament (Heater) Voltage: 5 V
  • Filament (Heater) Current: 1.2 A
  • Max Plate (Anode) Voltage: 480 V
  • Plate Dissipation: 40 W
  • Plate Current (Self-Bias): ~100 mA
  • Plate Current (Fixed Bias): ~70 mA
  • Input Capacitance: ~9 pF
  • Output Capacitance: ~4.3 pF
  • Transfer Capacitance: ~15 pF
  • Plate Current (Ia): ~60 mA
  • Transconductance: ~5.5 mA/V
  • Plate Resistance: ~0.7 kΩ
  • Amplification Factor: ~3.85

Includes user handbook, certificate of authenticity, and warranty.

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