Rbas on vv device vs mech

Status
Not open for further replies.
aren't mechanicals limited to about 3.7V? it's basically just a battery, a switch, and a pretty battery housing, right? so if you've got a 1.5ohm coil, assuming resistance doesn't change too terribly much as wire temperature rises (which being a newbie i could be totally wrong about), you're still going to max out at about 3.7/1.5=2.5A. and that's really not much current at all when you're talking about FETs. is the current state of circuitry design in the e-cig market so far behind the times that a vv/vw can't even do that much current?

what ~might~ be happening here is that the MVP's battery is getting a little old and has built up some internal resistance, limiting current output. im not all up on the myriad different lithium cell technologies, but that certainly happens with every battery chemistry i do know about.
 

K-Woodz

Senior Member
ECF Veteran
Verified Member
Jun 4, 2013
198
145
43
Huntington Beach CA
aren't mechanicals limited to about 3.7V? it's basically just a battery, a switch, and a pretty battery housing, right? so if you've got a 1.5ohm coil, assuming resistance doesn't change too terribly much as wire temperature rises (which being a newbie i could be totally wrong about), you're still going to max out at about 3.7/1.5=2.5A. and that's really not much current at all when you're talking about FETs. is the current state of circuitry design in the e-cig market so far behind the times that a vv/vw can't even do that much current?

what ~might~ be happening here is that the MVP's battery is getting a little old and has built up some internal resistance, limiting current output. im not all up on the myriad different lithium cell technologies, but that certainly happens with every battery chemistry i do know about.

Exactly my thoughts. If I were comparing both devices at 3.7v, I would expect the mech to come out on top. But with the MVP at a much higher (assumed) voltage of 5v, I think the mvp should be producing much more action than the mech. The MVP is actually only 3 weeks old btw.
 

Bimini Twist

Twisted Member
ECF Veteran
Verified Member
Dec 27, 2012
1,661
5,843
67
Redneck Riviera
www.mboyd.com
It may have something to do with the boost circuit used in the MVP. Does it use the 33Hz PWM?

I do notice quite a difference when moving an RBA between a Vamo and a Provari with the Provari producing a more satisfying vape. I can get close on the Vamo with a different voltage setting.

Not so much difference between the Provari and a mech mod when set to the same voltage. However, I usually save the mech for lower resistance coils.
 

K-Woodz

Senior Member
ECF Veteran
Verified Member
Jun 4, 2013
198
145
43
Huntington Beach CA
It may have something to do with the boost circuit used in the MVP. Does it use the 33Hz PWM?

I do notice quite a difference when moving an RBA between a Vamo and a Provari with the Provari producing a more satisfying vape. I can get close on the Vamo with a different voltage setting.

Not so much difference between the Provari and a mech mod when set to the same voltage. However, I usually save the mech for lower resistance coils.

Good thing I just got a Provari to try this with! Thanks for the input.
 

K-Woodz

Senior Member
ECF Veteran
Verified Member
Jun 4, 2013
198
145
43
Huntington Beach CA
Sure thing. Let us know if that's the difference.

I made a new 1.5 ohm coil. I must have done something wrong last time, because although the provari was def better than the MVP, the MVP seems to be functioning properly. I need some 32G kanthal. The 28 gauge I have on hand is hard to get past 1.5 ohms. I was trying for 2 ohms. 7 wraps around doubled over 3mm silica.

The provari would only fire the coil up to 4.5 V. At 4.6 it becomes inconsistent and it begins to give an e4 error. Not that I would go any higher, but I wanted to see the limitation.
 
Status
Not open for further replies.

Users who are viewing this thread