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    • Ray Tubes KT88 Reserve vacuum tube
    Ray Tubes KT88 Reserve vacuum tube - Image 2
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    Ray Tubes KT88 Reserve vacuum tube

    Price range: $359.00 through $1,699.00

    SKU RKT88R Categories , Tags , , ,
    Quantity:

    Additional information

    Weight 20 kg
    Dimensions 12 × 8 × 20 cm
    Quantity

    Single, Matched Pair, Matched Quad

    The KT88 is a beam tetrode introduced in 1956 as a variant of its smaller cousin, the KT66. Its name is derived from kinkless tetrode, an earlier name for the beam tetrode, and itʼs been popular in high-fidelity stereo systems since its introduction. Since New Old Stock of the KT88 is especially rare, Ray Tubes is proud to offer brand-new KT88 vacuum tubes.

    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: KT88
    • Tube Socket: 8-pin
    • Max Anode Dissipation Power: 42 W
    • Max Screen Dissipation Power: 8 W
    • Max Anode + Screen Dissipation Power: 46 W
    • Max Anode Voltage: 800 V
    • Max Screen Voltage: 600 V
    • Max Grid Voltage: ~200 V
    • Max Cathode Current: 230 mA
    • Heater Voltage: 6.3 V
    • Heater Current: 1.6 A
    • Transconductance: 12 mA/V
    • Amplification Factor: 8
    • Total Height: 119 mm

    Tetrode Connection

    • Screen Voltage: 250 V
    • Anode Voltage: 250 V
    • Anode Current: 140 mA
    • Grid Voltage: 15 V
    • Grid Current: 3 mA
    • Internal Resistance: 12 kΩ
    • Amplification Factor: 8

    Triode Connection

    • Anode Voltage: 250 V
    • Anode Current: 143 mA
    • Grid Voltage: 15 V
    • Internal Resistance: 670 Ω
    • Amplification Factor: 8

     

    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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