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Thread: The Rattlesnake Effect- Why the Cheapo VV [Exception Itaste MVP] Don't Vape the Same as a Provari or DNA20D

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    Default The Rattlesnake Effect- Why the Cheapo VV [Exception Itaste MVP] Don't Vape the Same as a Provari or DNA20D

    If you check out any of the PBusardo videos and fast forward to the section where he tests the voltage output. All of the low end vv devices, the Vamo, the SVD, Zmax etc are using PWM or Pulse Width Modulation without filters.PBusardo says that you can tell because when you vape on these devices on certain atomizers they sound like a rattlesnake.

    The Provari, The Itaste MVP, the DNA20D Mods all have filters or are using different technology and they are outputting a straight voltage amount.

    You may ask what is the difference. Well the PWM has a fluctuation in voltage that is very large and very quick, some say that you can't detect it. Some even like it better. Some say it make the atty sound like a rattlesnake and is harsher.

    For example on a Vamo if you set the voltage to 4V the voltage will fluctuate between around 7v and 3v the duty cycle will be short and the ending mean is the 4v that you've set.

    A Picture is worth a thousand words, I captured the top two pictures from PBusardos You Tube Review of the Vamo and the bottom from his Youtube Video of the MVP.

    Picture 1 showing the 33hz chip that the Vamos Uses
    pwm1.jpg


    Picture 2 Showing the Voltage Wave fluctuation of a Vamo
    PWM2.jpg


    Picture 3 Showing the Voltage Wave Fluctuation of a MVP or Provari or DNA20D
    PWM3.jpg
    Last edited by tomzgreat; 11-06-2013 at 07:57 PM.

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    33hz, not 33mhz
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    Quote Originally Posted by RatInDaHat View Post
    33hz, not 33mhz
    Edit Made, Thank You

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    What about the itaste vv 3? It should be the same as a MVP circuitry I hope

    Sent from my SPH-L900 using Tapatalk
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    Quote Originally Posted by ktazz View Post
    What about the itaste vv 3? It should be the same as a MVP circuitry I hope

    Sent from my SPH-L900 using Tapatalk
    I checked the Pbusardo review and it says the signal is flat. So yes it's not using PWM

    It's a winner!
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    By the way the Ego Twist according to Busardo doesn't give a flat reading above it's lowest setting and he had to use a device that averages the waves.

    So no you aren't going to get a Provari - MVP -Dna20D Vape off of an Ego.
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    I love that Zmax rattlesnake vape. Vaping without it just isn't as good.
    Sigelei Zmax V3 Telescopic (flat top). 22mm XL glass tank from IBTanked. Smoktech single coil 2.0 LR XL cartos. Unflavored DIY 95/5 VG/H2O 15mg nicotine with Xtreme Vaping nicotine base. Vaping since 11/19/2011. 35-year cigarette habit ended 4/22/2012.

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    You can taste electricity? Uh, OK, whatever.
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    Quote Originally Posted by Mike.S View Post
    You can taste electricity? Uh, OK, whatever.
    The stability of the Power wave may effect the quality of the vape.

    With the PWM fluctuating the voltage goes very high then low. This effects how the coils are heated. Instead of a constant heating of the coil you have fluctuations in the heating. [Debatably] and this will effect how the juice is vaporized and possibly the quality and taste of the vape.
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    Quote Originally Posted by Mike.S View Post
    You can taste electricity? Uh, OK, whatever.
    Uh, the rattlesnake effect (for those that never experienced it) is a pulse in vapor production from these PWM APVs. It is sensed by hearing alone. The rattlesnake effect is loudest when is the power button is pressed without anything contacting the drip tip.

    The rattlesnake sound is related to the 33hz chips used in the APVs, but is nowhere close to being an audible 33hz tone. The sound actually seems to cycle a few times per second. The rattlesnake has no effect on vapor quality that I can detect.

    Nobody is going to see a difference in a coil glowing with DC power pulsed 33 times per second compared to a coil powered by pure DC. The same goes with vapor produced by the coil.

    Unless you just don't like the sound, the rattlesnake effect is a non-issue.
    Last edited by yzer; 11-07-2013 at 03:55 PM.
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    Sigelei Zmax V3 Telescopic (flat top). 22mm XL glass tank from IBTanked. Smoktech single coil 2.0 LR XL cartos. Unflavored DIY 95/5 VG/H2O 15mg nicotine with Xtreme Vaping nicotine base. Vaping since 11/19/2011. 35-year cigarette habit ended 4/22/2012.

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