stacked 18350

[peraspera]

Yes you can quistion that no problem, why 3.3ohm just because is my first succesfull build on my rda and i didnt know what da heck i was doing, i have lots of knowledge on electronics but non on building coils, for sure i would prefer a 1.8 - 2.2 range but 3.3 was what i got.. Is working very well but need lots of power and my vamo can feed that power in fact this 3.3 ohm is getting me more vapor and flavor thatn stock 2.2ohm i was using (premade ones) the only con is that need more time to fully heat the coil i just press the fire buton before take my vamo into my mouth.
...

I don’t know what type of vape you are after but I use the HH.357 as the gold standard for judging my rebuildables and they all fall pitifully short despite the fact I have no issues with building good coils. I’m deliriously happy with my AMP tank/HH.357 combos so haven’t given the technique a spin yet. However, for RDAs, using micro coils sounds like it might get closer to the HH.357.

 

[Scott_Simpson]

with a single battery on 3.3 ohms the vamo can not go up to 6v take a look on the pbusardo video of the vamo and chart to see. Is easier to bring down voltage from 7.4 to 5v then go from 3.7v to 5v.

That is the reason the vamo accept stacked batteries to get up to 6v.
That is the reason evic does not go up to 6v because no stacked can be used


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Thanks for the information, but that doesn't answer my question. When using stacked 18350s, does the Vamo just drop the voltage to the requested level without using PWM, or does it first drop the voltage to 6V and then use PWM to pulse the voltage down to the requested level?

 

[DaxFX]

Thanks for the information, but that doesn't answer my question. When using stacked 18350s, does the Vamo just drop the voltage to the requested level without using PWM, or does it first drop the voltage to 6V and then use PWM to pulse the voltage down to the requested level?

Im not sure how the voltage is droped, most be any kind if internal resistance or voltage regulation but the PWM still working on stacked,

I dont have take a look on the internals of the vamo but they must have any kind of capacitor or something so at 3.7v the pulse no matter your volt setup always goes up to 6v pulsing beteween 6v and 0v

Example. (-- means 6v) ( _ means 0v)
----__----__----__----__ that pulse between should give you lets say 4v

-------__-------__------__ with this pulse should give lets say 5v

-__-__-__-__ with this pulse should give lets say 3v

_-----------------_ this is a 6v

The voltage would be an avarage produced by the pulse, ther is when MEAN and RMS came into place. Older devices don't have a good averega reading so RMS came with a better reading of the average voltage

So to achive this 6v pulse most be in there some kind of capacitor that would charge in between pulses or wathever methos is there to bring up the voltage in serial with a 3.7v source so a steady line at 6v the capacitor will be dischargedand no longer will be able to supply more voltage unles you have bery big capacitor that will charge when not firing..

At 7.4 no need a capacitor or whatever is working there only a voltage regulator that i thinc could be a BEC so no matter what voltage setup you set up you have plenty of volt to supply.. So at lower volt (single battery) current amp needs to be higher and the vamo have a limitation that would not let you go further up, with stacked battery you will reduce the current amp and you would not reach the amp limitation

Another thing is the amp limitation (amp = watts / volt) and (volts*amp = watts) so with a higer volt power supply the current amp will be lower and with a lower volt supply you will have a higher amp drain.

I have not kill my vamo to se the internal so this is not an official answer just my theory


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[Tommy Aces]

with a single battery on 3.3 ohms the vamo can not go up to 6v take a look on the pbusardo video of the vamo and chart to see. Is easier to bring down voltage from 7.4 to 5v then go from 3.7v to 5v.

That is the reason the vamo accept stacked batteries to get up to 6v.
That is the reason evic does not go up to 6v because no stacked can be used


Sent from my iVap using Tapatalk HD

Where on PBusardo's video do you see that the VAMO won't fire a 3.3ohm coil at 6 volts? The closest I see is it firing a 3.1 ohm carto at 5.8v on it's 6v setting...which equates to about 10.85 watts....right about the 11ish where the VAMO will max out unless stacked. Firing a 3.3 ohm coil at 6v equals about 10.9 watts, so if it indeed won't fire at 6v, it's gotta be close enough to be able to fairly call it 6v.

 

[jonescreek]

I tried stacking 2 the other day. The display got so bright it scared me and I quickly took them out. I can't risk frying my Vamo right now. I just bit the bullet and ordered me a couple more 18650....call me a chicken I guess LOL!

chicken lol

 

[nahoku]

Thanks for the information, but that doesn't answer my question. When using stacked 18350s, does the Vamo just drop the voltage to the requested level without using PWM, or does it first drop the voltage to 6V and then use PWM to pulse the voltage down to the requested level?

The Vamo always uses PWM with stacked or single battery... http://www.e-cigarette-forum.com/forum/vamo/420191-single-vs-stacked-pwm-scope-results.html