This and that and Chat

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El Dee

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-3* overnight....Chance of losing power as well...Nothing about that I can deal with...55* here and I'm .....in' about that...Try and stay warm....

Thanks Wharf..I've only glanced at yarn wicks and did see that Grimm had one doubled a few days back....He doubled and wrapped that...I'll be wrapping a micro and stuffing the wick thru...I liked the yarn vs. cotton ball due to the no guessing how much is good factor...I'll be watching some wicking tech in the coming days....

5 I gotta question...Have you heard of the "RattleSnake Effect" ???? It's present in all VV devices but way more noticeable in something such as a Vamo{known here as Cheapo}...I liken it to a rev limiter on a drag car...Set the limiter and while staged bring the car up on the limiter for launch...It gets rough and poppy bouncing off the limiter....This same effect can be heard when firing some VV devices and hence the name RS Effect...Pro-Varis are known for consistent power delivery and I would suppose the dna series would be as well though IDK...In all my days hitting a NotCig product I never once noticed any RS Effect from them either...I was wondering this as it seems to be becoming a selling point vs. the Chinese Cheapos...My whole theory with the KFL is to run the Pro at or below the 3.7 potential of the 18650 and buck it instead of boost it...There are a few advantages there...We've been discussing Buzz since before there was one...I don't think we've ever touched on consistent power delivery and like I said I've never heard my Buzz doing the Rattle Snake...It's noticeable with the Innokin MVP though you gotta listen for it..There is more time between the "rattles" than one would suspect...More noticeable as power is boosted...
 

kgj

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LD, the rattlesnake effect is common to a whole bunch of VW PVs that use the same chips as the Vamo and SVD. They use a technique called Pulse Width Modulation (PWM) to produces the variable voltage/variable wattage effect. The only output they actually produce is their maximum voltage of six volts. If you select three volts, it actually puts out six volts, but only half of the time. If you select four volts, it puts out six volts two thirds of the time. Whether you go by voltage or power, it figures out the correct on/off ratio.

Duty cycle is about thirty Hertz or thirty cycles per second, meaning that it repeats that on/off ratio thirty times every second.

Because thirty hertz is in the audio range, lots of people can actually hear the cycle and it sounds like a rattlesnake.
 
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