Legit Or Snakeoil?

Discussion in 'The Workbench' started by anitoli, Aug 7, 2018.

  1. anitoli

    anitoli Well-Known Member

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  2. Gunner64

    Gunner64 Well-Known Member

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    Legit. I have seen simular rings used In tube stereo situations and they are supposed to cut the vibrations/microphonics. I have never needed them myself, as microphonic tubes get pulled in my world.
     
  3. Micky

    Micky Well-Known Member VIP Member

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    The DSL40c comes with one, although it is just a cheap grommet that fits. That is all you need, an o-ring or such, don't spend a lot of money on this.
     
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  4. anitoli

    anitoli Well-Known Member

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    Yeah, at $23 a pop for an 12AX7 guess i'll be wondering for a long time.
     
  5. charveldan

    charveldan Well-Known Member

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    $24 each for 12AX7, $31 each for EL-34, $40 each for 6L6.

    A quad of those rings cost as much or more than the Tubes lol.

    Those rings prolly cost 5 cents each to manufacture.

    Sounds Swampy to me ...
     
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  6. mickeydg5

    mickeydg5 Well-Known Member VIP Member

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    I believe Marty use to use some sort of red grommets to dampen tubes. They are cheaper, much cheaper.
     
  7. wakjob

    wakjob Well-Known Member

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    yeah...um...

    I just bought the cheap brick red colored silicone ones,
    and they work just fine. Don't think I'll be getting these.
     
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  8. chee16

    chee16 Active Member

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    I have the red high heat silicone ones too. No need for anything expensive based on their function. I think I got mine on eBay.
     
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  9. MarshallDog

    MarshallDog Well-Known Member

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    I have these on my 12AX7s on combo amps. Not needed on heads obviously. These last and do reduce tube rattle. I have used the cheap red o-ring ones and they dry out and fall apart. These have lasted me over 5 years and counting. You get what you pay for!
     
  10. ampmadscientist

    ampmadscientist Well-Known Member

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    They actually do work.
    No it is not snake oil.
    The ring increases the mass of the envelope and lowers the resonant frequency. The idea is to make the resonant frequency so low that the ringing is stopped.
    Some principle used in hi fi phono tone arms.
    Fender HRD has one also:

    [​IMG]
     
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  11. tschrama

    tschrama Well-Known Member

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    snake oil!

    It adds mass but no damping. The added mass can cause microphonics just as likely as avoid it.

    The price is ridiculus.

    use tube retainers instead, or a alluminum bar as Mesa does in some combos
     
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  12. GT08

    GT08 Active Member

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    Well in this case if it's anything it's daylight robbery that's for sure. You would be a real mug to buy these.
    Rock n' roll
     
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  13. MarshallDog

    MarshallDog Well-Known Member

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    Basically until you try them, do not knock them.

    And, how can anyone comment until they try them:scratch:
     
  14. ampmadscientist

    ampmadscientist Well-Known Member

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    Boogie does the same deal on preamp tubes also.
    They wrap the tube in foam to stop it from ringing.

    [​IMG]
     
  15. ampmadscientist

    ampmadscientist Well-Known Member

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    I know just from many trails and tests that
    it definitely works.
    There are many different methods, and designs...

    [​IMG] Herbies, about $27

    [​IMG] Eurotubes, about $5.00. The larger size adds more mass making the frequency lower, probably more effective.
    The silicon is heat resistant. Good design, good price.

    [​IMG]

    VTS- vintage tube services, hand made not mass produced.
    Probably one of the best designed dampers, about $120 a pair. High end performance because the frequency is lowered below the frequency response of the amplifier and speakers.

    [​IMG]

    Bermuda Audio tube dampers, 15-35 Euro.

    [​IMG]

    Cool Dampers, about $35.

    [​IMG]

    [​IMG]


    [​IMG]

    [​IMG]

    Brass Ring about $13.00

    [​IMG]

    Copper Stopper = about $25

    [​IMG]


    The Original Idea:
    comes from Hi Fi. Hi Fi has similar microphonic problems because of the resonance of phono turntables.
    You can learn a lot from those Hi Fi guys.
     
    Last edited: Aug 8, 2018
  16. ampmadscientist

    ampmadscientist Well-Known Member

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    Tube retainers don't stop the ringing, of this you can be certain.

    [​IMG] Practically useless...
     
    Last edited: Aug 8, 2018
  17. ampmadscientist

    ampmadscientist Well-Known Member

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    Most professional tube dampers are right in that price range. AND: PS these do work.
     
  18. RobS

    RobS Active Member

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    the red Bermuda damper looks like the oil filter collar I use on my Harley for cooling!
     
  19. charveldan

    charveldan Well-Known Member

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    And to think for 40 years ive been doing it wrong because i don't use $200 bucks worth of Silicone.
     
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  20. LPMarshall hack

    LPMarshall hack Well-Known Member

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    $200??? You forgot a few zeroes.
     

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