6L6/5881/KT66

The 6L6 was first introduced in 1936 by RCA and has become the most popular American output tube. Philips had patented a power pentode design, so RCA designed the 6L6 as a beam tetrode instead. The 6L6 has been used in most American designed amplfiiers of 40 watts or more like the Fender Super Reverb, Twin, Hot Rod Deluxe, and countless others.

Equivalent and similar types include 6L6G, 6L6GB, 6L6GC, 6L6WGC, 5881, 5932 and 7027. Not all of these types are interchangeable in every situation.
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    Electro-Harmonix Power Vacuum Tube, 6L6 SKU#: T-EH-6L6
    $26.85
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    JJ Power Vacuum Tube, 5881 SKU#: T-JJ-5881
    $20.10
  3. Rating:
    87%
    JJ Power Vacuum Tube, 6L6GC SKU#: T-JJ-6L6
    $22.55
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    JJ Power Vacuum Tube, KT66 SKU#: T-JJ-KT66
    $39.59
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    Ruby Power Vacuum Tube, 6L6GCM-STR SKU#: T-RBY-6L6
    $21.25
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    Sovtek Power Vacuum Tube, 5881/6L6WGC SKU#: T-SOV-6L6WGC
    $22.75
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    Sovtek Power Vacuum Tube, 5881WXT SKU#: T-SOV-5881
    $20.75
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    Sovtek Power Vacuum Tube, 6L6WXT+ SKU#: T-SOV-6L6WXT
    $23.95
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    Tube Amp Doctor Power Tube, 6L6GC SKU#: T-TAD-6L6GC
    $25.49
  10. Rating:
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    Tube Amp Doctor Power Tube, 6L6WGC SKU#: T-TAD-6L6WGC
    $25.49
  11. Rating:
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    Tung Sol Power Vacuum Tube, 7581 SKU#: T-TNG-7581
    $24.95
    Out of stock
  12. Rating:
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    Valve Art Power Vacuum Tube, KT66 SKU#: T-VA-KT66
    $33.50
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