on average, how hot does a pair of 6V6 get in a 15 watt amp?

Discussion in 'Amps/Cabs Tech Corner: Amplifier, Cab & Speakers' started by Toneseeker361, Feb 29, 2012.

  1. Toneseeker361

    Toneseeker361 Member

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    Has anyone taken a thermometer to a par of 6V6 tubes?
    More or less, how hot do they get?
    200 degrees?
    300 degrees?
    400 degrees?:confused:
     
  2. phsyconoodler

    phsyconoodler Member

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    Pretty hot.I haven't actually measured the temperature but imagine a Tweed Deluxe running close to class A current.They get damn hot to the touch on the control panel after a set of music,so they would be rather close to 300 degrees.They could not likely get close to 400 because they would come close to melting lead.

    Hot,nonetheless.
     
  3. guitarcapo

    guitarcapo Senior Member

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    I'm reading up to 200 degrees Celsius on line.
     
  4. Tuberattler

    Tuberattler Member

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    Blister city- they run damn hot on the side glass and pretty hot on the end of the glass as well. 200 degrees easy...
     
  5. guitarcapo

    guitarcapo Senior Member

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    Celsius and Farenheit is an important distinction too.
     
  6. Billm

    Billm Member

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    They run between 300 and 350 degrees Fahrenheit, as I recall. It's been a while since I took surface temperatures.
     
  7. phsyconoodler

    phsyconoodler Member

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    200 celcius is about 392 farenheit.Sounds feasible.

    The way the amp is biased is a big factor of how hot the tubes get.Small bottles get really hot because they are biased so hot in cathode biased mode.
    Big bottles in a fixed bias amp get hot too but not as hot proportionally to 6
    V6's and EL84's
    They would be really hot in cathode biased mode.(6L6)
     
  8. ptrickamp222

    ptrickamp222 Member

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    hot enough to burn your fingers on top of the tube
     
  9. Trout

    Trout Member

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    Hot enough to cook bacon, but not hot enough to ignite/burn paper(unless its running out of spec)
     
  10. Billm

    Billm Member

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    I was just testing my new Blues Junior adjustable bias board (voltage doubler to get the bias up to the right range for the higher-voltage power transformer and 5881/6L6).

    I plugged in a pair of JJ 6V6-S tubes and idled them at 10 watts. The hottest glass temperature I could find was only 241F.

    I put in a pair of Sovtek 5881s and idled them at 16 watts. The glass was 330F.
     

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