33.3 Hz vs 650 Hz?

[Alien Traveler]

Disclaimer: I never tried 650 Hz device. So, what you see below is really partly a question and only partly a statement.

OK. Looks like a lot of people had already seen these dreadful graphs with pulsating voltage of 33.3 Hz devices. They look bad. So what? Voltage is of low importance to vapers, coil temperature is of greater interest. Metal coil has a lot of thermal inertia, it will heat up and cool down relatively slow compared to voltage changes, so that variations in temperature will be much smaller than variations in voltage (have you seen incandescent bulb with tungsten wire? Have you tried to touch electric stove top 5 minutes after it was turned off?) But again, temperature of wire is of secondary importance to vapers, temperature of liquid in a wick is the most important thing. And liquid in a wick has much greater thermal inertia than a wire. So, its temperature variations will be much smaller. Sure, there will be some (not big) variations, but how important are they?

It looks like in couple years manufacturers even of the cheapest mods could afford to put in their devices 650 Hz circuits. Isn’t it possible that in couple more years manufacturers of expensive mods will come out with new marketing pitch – 66.6 Hz devices “which provide much better vaping experience compared to devices with dull constant voltage”?

 

[Miata GT]

This has been argued before and while I agree with the inertia thing, if you've ever vaped off of a SID (33mHz) then tried a ProVari (800mHz?) you will know the difference. The smoothness of the delivery is obvious.

 

[yzer]

Well, the whole rattlesnake thing about PWM frequency and quality of vapor is FUD (Fear, Uncertainty, Doubt). FUD is one one of the more celebrated marketing ploys. It is gobbledegook at it's best.

The 33.3 Hz devices do make a sound depending on atomizer used, coil resistance, wattage and charge remaining of the battery. The sound comes from the atomizer most of the time but can also come from the device itself.

Put on your favorite music and a pair of closed headphones like Sennheiser HD 280 Pro. You will hear only music and no sound from the outside. Vape your 33.3 device with your favorite atomizer. Now, swap out the device with a non 33.3 device and your favorite atomizer at the same power. There will be no difference in vapor quality.

Any perceived differences in the quality of vapor produced by 33.3 and non 33.3 devices is placebo effect suggested by a difference in sound.

 

[Dampmaskin]

When the rattlesnake sound comes from the atty, the logical explanation is that it comes from juice being vaporized 33.3 times a second instead of at a constant rate. I just washed and dry burned a coil on my Vamo an hour ago, and the rattlesnaking was crazy loud. I guess that was due to the water residue on the coil. Water seems to be noisier than PG.

Anyway: When the PWM frequency affects the vaporization of liquid itself, enough to produce very different sounds, I don't find it that much of a leap of faith to believe that the PWM frequency can also affect the taste of the vapor being produced.

 

[rc3po]

Frequency shouldn't matter much in firing a coil. Mech mods don't need PWM. It's interesting though. I guess I should hook my e-LVT up to my scope and see what it does. I set my mod to watts & let it take care of the volts.