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Tubes - Transmitting, Audio, Misc.

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  1. 6688 Sylvania Black Plate Pentode (NOS)

    6688 Sylvania Black Plate Pentode (NOS)

    $13.91

    Designed for use as wide band amplifier
    Base: Noval. 9 pins.
    New Old Stock * No longer available for export
    MFR: Sylvania
    SKU: 6688-SYL

    Made in the USA

  2. 5693/6SJ7 GE Red Series Sharp Cut Off Pentode Tube (NOS/NIB)

    5693/6SJ7 GE Red Series Sharp Cut Off Pentode Tube (NOS/NIB)

    $39.91

    Designed for use as a biased detector or high-gain amplifier.
    New Old stock * no longer available for export
    MFR: GE
    SKU: 5693-RED-GE

    NOTE: Picture for reference only. 

    Made in the USA

  3. 5693/6SJ7 GE Red Base Sharp Cut Off Pentode Tube (NOS/NIB)

    5693/6SJ7 GE Red Base Sharp Cut Off Pentode Tube (NOS/NIB)

    $39.91

    Designed for use as a biased detector or high-gain amplifier.
    New Old stock * no longer available for export
    MFR: GE
    SKU: 5693-REDBASE-GE

    NOTE: Picture for reference only. 

    Made in the USA

  4. 5691/6SL7GT Red Base Grey Plate High Mu Twin Triode Tube (NOS/NIB)

    5691/6SL7GT Red Base Grey Plate High Mu Twin Triode Tube (NOS/NIB)

    $179.91

    The red base 5691 is a premium 6SL7 made to last over 10,000 hours and produce low noise. 
    New old stock * No longer available for export.
    MFR: GE
    SKU: 5691-RED-GP

    Made in the USA

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