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    • Ray Tubes 300B Select vacuum tube
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    Ray Tubes 300B Select vacuum tube

    Price range: $399.00 through $1,599.00

    SKU R300BS 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 SELECT Collection offers the best tubes youʼll ever need. It goes above and beyond the baseline to bring out the best in all your favourites.

    • Designed and manufactured by a team with decades of experience
    • Hand-selected by engineers—only the top tubes make the cut
    • Gold pins for durability and longevity
    • 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

    Filament (Heater) Ratings

    • Filament Voltage: 5 V
    • Filament Current: 1.2 A

    Maximum Ratings

    • Plate (Anode) Voltage: 480 V
    • Plate Dissipation: 40 W

    Typical Operating Conditions

    • Plate Current (Self-Bias): 100mA
    • Plate Current (Fixed Bias): 70mA

    Interelectrode Capacitance at Zero Bias

    • Input Capacitance: 9 pF
    • Output Capacitance: 4.3 pF
    • Transfer Capacitance: 15 pF

    Static Characteristics (under typical conditions)

    • Plate Current (Ia): 60 mA
    • Transconductance (Gm): 5.5 mA/V
    • Plate Resistance (Rp): 0.7 kΩ
    • Amplification Factor (μ): 3.85
    • Output Power (Pout): 6.6 W

     

    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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