Sub tank on Lavatube -- actual voltages

[dotma]

Okay so my Hawaiian friend, this is for you -- I put the submarine tanks on my Lavatube with an under load meter to see what the actual voltage would be with the different ohm cartos. These are single coil cartos in the sub tanks from Mom and Pop Vapor Shop. (wish i knew how to make a table on here)

With a 3.0 ohm carto in the mini sub:

Lavatube set at:
3.5 (actual 3.45)
4.0 (actual 3.96)
4.5 (actual 4.5)
5.0 (actual 5.0)
5.5 (actual 5.5)
6.0 (actual 5.7)

As you can see, with a 3 ohm carto in this tank, the real voltages as read by the under load meter are very very close to what you set the Lavatube at.

Now with a 1.7 ohm carto in the submarine tank:

Lavatube set at:
3.5 (actual 3.44)
4.0 (actual 3.93)
4.5 (actual 3.99)
5.0 (actual 3.97)
5.5 (actual 3.97)
6.0 (actual 3.97)

As you can see with the lower resistance carto in there, it starts to drop off by 4.5 and then after that the LT keeps itself steady at about 3.97.

So i guess the moral of the story is: If you wanna do high voltage vaping, definitely go with the 3.0 ohm. If you dont care so much about going past about 4 volts, use whatever you want and the LT will do its job and adjust accordingly!

 

[dotma]

heres a lovely picture for y'all!

 

[Keeno]

Those results are acceptable IMO not perfect but acceptable as in pretty much up to specs on the Volcano website. I realized what I was getting if using a LR atty but good to see the excellent results with the 3.0 carts. Just one question I have and that is if you were on a full charge, half charge etc.... Thanks again.

 

[dotma]

Oh i never thought of that, Keeno. It was a pretty full charge. It says 4.0 right now. I just took my other batt off the charger and it says 4.1.

 

[Keeno]

Pretty much full....thanks for all that info...very valuable to know....

 

[sharpi]

Thanks for the post. I feel pretty good about the Lavatube's performance. Happy with the decision I made to purchase. I understood the limitations with LR and DC before I bought it.

 

[Nomoreash]

Those numbers look like the regulator is functioning as it should. The 2.5 over current protection should kick in right at 4.2v with a 1.7 ohm load and that's what it's showing.

If you could do the same test again at different points in the battery drain that would help a lot. I've seen some say that the regulator wasn't holding the set voltage it should as the battery drains. Of course it's going to drop just before it's time to recharge but if you could test fresh off the charger which should be right at 4.2v(which that might be already) and then another test when the batter reaches around 3.7v and compare the numbers if they are close at that point everything should be functioning as it should.

 

[Scottinboca]

Dotma you da woman!

 

[zoiDman]

Oh i never thought of that, Keeno. It was a pretty full charge. It says 4.0 right now. I just took my other batt off the charger and it says 4.1.

One quick question.

Do you have a way to check the Ohms on those Cartos?

BTW - The Results for the 1.7ohm Carto seem to be consistant with what others have posted. So I don't think it is just Your unit.

 

[zoiDman]

heres a lovely picture for y'all! View attachment 71583

BTW2 - That is a Very Cool looking Inline Meter. Where did you get it?

 

[dotma]

Zoidman -- hmm yeah i could use one of those other meter thingies that my husband has -- i think that will check the ohms to make sure they are right -- correct??

And thanks! My hubs got that meter for me at um -- hang on, i have to look it up -- something moon.

Okay, here it is: Other Products

 

[zoiDman]

Zoidman -- hmm yeah i could use one of those other meter thingies that my husband has -- i think that will check the ohms to make sure they are right -- correct??

And thanks! My hubs got that meter for me at um -- hang on, i have to look it up -- something moon.

Okay, here it is: Other Products

Thanks dotma.

No rush. If its easier to wait for your husband to get home, its no big deal.

Everyones just curious what the cut-off value for the Lavatube is. And knowing the Exact ohms of that 1.7 ohm Carto would take one Variable out of the equation.

 

[donnah]

This was pretty close to my results also. I can use a 1.7 carto up to 4.2 before it knocks me back to 4v. Seeing as I don't want to go over 4.2 with a 1.7 carto, I'm alright with this.

 

[Creniker]

You should retry that test once your battery is at 3.7v. I bet you get different results.

 

[AttyPops]

Correct me if I'm wrong here gang. With any mod... but specifically with mods that have removable batteries... the voltage drop is most likely due to the batteries 1st, the regulator 2nd. In other words... amperage starvation.

So, the question I have is "What if you use AW IMR high-drain batteries?". Does it make a difference?

Also, this is interesting:
http://www.e-cigarette-forum.com/forum/general-e-smoking-discussion/168171-18650-battery-wars.html

OTOH.. post #7 seems to indicate the regulator cutting out. IDK why you would want 5 volts at 1.7ish ohms unless you're dealing with DCs or something. So maybe that's it. DC's.

If it's a 2.5 amp cutoff, the lowest you could go at 5 volts is 2.0 ohms

EDIT: Please pardon me for dropping in... I don't have an LT but it is one I would look at for VV so I'm curious.

EDIT AGAIN - Never mind: Found this on the site:

Amperage Limiting to 2.5 amps – The device should monitor and shut itself off if it detects any excessive over-current conditions.

 

[zoiDman]

...

If it's a 2.5 amp cutoff, the lowest you could go at 5 volts is 2.0 ohms
...

Because the High Voltage Crowd feel Jerked not being able to do the Same Watts as the the Normal Ohm Crowd Watt wise.

Right?

That or there are Shills in the Mix to put their Big Winded Posts either For or Against something.

 

[zoiDman]

Bet-cha 5 against 7 that a Certain Member will Chime in Very Soon.

And If he Doesn't, well then that just makes this an Un-Biaszed(SP?) post.

 

[AttyPops]

Hi zoiD! lol. Not sure I understand that one. But OK. I think I got it....

Just remember. DC's.

Since I don't use DC's.. I'd consider the LT. Probably would consider it even if I did use em.

I like the short protection feature. So if an atty/carto shorts out, you don't fry the regulator.

 

[dotma]

Zoid, i dont understand anything you said those last two posts lol. Attypops, I asked Pop from mom and pop vapor shop I think yesterday and these are not duel coil (and actually I only understood half of your post too, you guys are way over my head here!) hahahaha

 

[Corpa]

Dotma hope you are feeling better. Thanks for the info and photo. I ordered the mini and the sub from Pop after he posted the vid review. Did you find it easy to prime and fill? May the mail lady stocking begin.