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    • Ray Tubes 300B Reserve vacuum tube
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    Ray Tubes 300B Reserve vacuum tube

    Price range: $789.00 through $3,399.00

    SKU R300BR Categories , Tags , , ,
    Quantity:

    Additional information

    Weight 20 kg
    Dimensions 12 × 8 × 20 cm
    Quantity

    Single, Matched Pair, Matched Quad

    The 300B is a legendary tube. Introduced in 1938, it powered the cinemas of Hollywoodʼs Golden Age. Audiophiles have treasured it for decades for its low noise and good reliability. Ray Tubes is proud to introduce our take on a classic.

    Product highlights

    The Ray Tubes RESERVE Collection isnʼt for everyone. Itʼs the distillation of decades of experience. RESERVE reveals audio details you never knew were there.

    • Bespoke design and small-batch production
    • Hand-selected by engineers to our most meticulous standards
    • Higher quality materials, including gold pins for longevity
    • Monocrystalline carbon Magic Coating for improved heat dissipation
    • Substantially more consistent performance than New Old Stock
    • Unlike NOS and most other new production, covered by the Ray Tubes
    • One Year Warranty

    Specifications

    • Tube Type: 300B
    • Tube Socket: 4-pin
    • Power Output (Pout): 6.6 W
    • Filament Voltage (Uf): 5 V
    • Filament Current (If): 1.2 A
    • Anode Voltage (Ua): 480 V
    • Anode Dissipation Power (Pa): 40 W
    • Cathode Current (Ik): Self Bias: 100 mA | Fixed Bias: 70 mA
    • Input Capacitance (Cin): 9 pF
    • Output Capacitance: 4.3 pF
    • Transfer Capacitance: 15 pF
    • Anode Voltage (Ua): 300 V
    • Grid Voltage (Ug): -60 V
    • Anode Current (Ia): 60 mA
    • Transconductance (Gm): 5.5 mA/V
    • nternal Resistance (Ri): 0.7 kΩ
    • Amplification Factor (μ): 3.85

     

    Tube compatibility list

    What’s included

    • Set of four, two or single vacuum tube
    • User handbook featuring burn-in guidelines
    • Certificate of authenticity and warranty

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