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7581A / KT66

The 7581/A tube is an industrial strength version of the 6L6GC which is also said to be the American equivalent to the British KT-66. The ratings 7581 are roughly the same as the 6L6GC while the 7581A has higher ratings. The 7581 has a plate voltage rating of 500 V--35 watts (5 watts more than the 6L6GC) and a screen rating of 450V--5 watts.

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  1. 7581A/KT66 Tube, Beam Power Amplifier, Mfg US brand

    7581A/KT66 Tube, Beam Power Amplifier, Mfg US brand

    $59.95

    Out of stock

    7581A/KT66 Tube, Beam Power Amplifier, Mfg US brand

    7581A/KT66 Tube, Beam Power Amplifier -  Audio Tetrode, MFR: US brand

  2. 7581A/KT66-MP-US  Tube, Matched pair, Beam Power Amplifier, US brand

    7581A/KT66-MP-US Tube, Matched pair, Beam Power Amplifier, US brand

    $119.90

    Out of stock

    7581A / KT66-MP-US  Tube, Matched pair, Beam Power Amplifier, US brand Select grade

  3. Transmitting Tube, Matched pair, Beam Power Amplifier, KT66 / 7581A, Taylor Tubes

    Transmitting Tube, Matched pair, Beam Power Amplifier, KT66 / 7581A, Taylor Tubes

    $49.90

    KT66MP Tube, Matched pair, Beam Power Amplifier, KT66 / 7581A, Taylor Tubes

    Made in China 

  4. 7581A Tube, Beam Power Amplifier, 7581A / KT66,  JAN/Philips

    7581A Tube, Beam Power Amplifier, 7581A / KT66, JAN/Philips

    $69.95

    Out of stock

    7581A Tube, Beam Power Amplifier - Audio Tetrode, 7581A / KT66, special purpose, JAN - Philips/ECG

  5. KT66 Genalex Factory Match Pair Golden Lion (NOS / NIB)

    KT66 Genalex Factory Match Pair Golden Lion (NOS / NIB)

    $499.95

    KT66 Genalex Factory Match Pair Golden Lion. New old stock tubes in their original packaging. Not for export. Made in England by The M.O. Valve Co.

  6. KT66 IEC Mullard Matched Pair (NOS / NIB)

    KT66 IEC Mullard Matched Pair (NOS / NIB)

    $350.00

    KT66 IEC Mullard Matched Pair, New Old Stock in Original Packaging. Made in the United Kingdom. Not for export. New old stock in the original box.

6 Item(s)