LR and SR cartos

[Anne (fuzzy)]

Can someone explain in simple English please which should be used with what mAh batteries. Thanks.

[Gordy]

LR should only be used on batteries with at least 650mah (but not a riva as the switch could fail)
SR can be used on any battery

LR heat up more and pull more power from the battery hence why its advised to use a battery that can handle the power draw

[Gordy]

the next question is what is considered a LR (low resistance) carto?

*the figures will be different from person to person*

up to 2.2ohms i would consider a LR
2.2 to 3.0 would be a standard
over 3.0 HR or HV ...high resistance / high voltage

as i said above i wouldnt risk a riva or similar unregulated battery with anything under 2.0ohms

[Anne (fuzzy)]

[kingofswords]

what can you usewith high votage?
and what is considered hv? is 4.2v?

[Gordy]

good question king ...i would say a standard voltage is a single battery so around 3.2 to 4.2 therefore anything above that i would consider high voltage the reason you need a higher resistance atty at higher voltage is so you can keep the amps down and not cause damage to atty or battery... as an example here is an equation

I = V / R which is Amps = Volts / Ohms
the lavatube and provari limit the ampage to somewhere just over 2amps... so if we plug that into the equation and clock the volts up to max 6v

I = V / R
2.0 amp = 6.0 volts / R ohm
so the lowest resistant atty we could use would be 3.0ohms
if we used a 2.0 ohm atty then the amps required would be 3amps and exceed the limit

if we did want to use a 2.0ohm then we would have to drop down the voltage
2.0 amp = volts / 2.0 ohm
= 4 volts

[Perpetua]

Gordy, you really are a mine of information!

You must have an encyclopedic brain.

Mine alas, is mush thesedays.

[VE Jason]

2ohm LR Cartomisers are absolutely fine on a Riva.

However, problems have been reported when using 1.5ohm Dual Coil Cartomisers.

If that helps.

[flimflam]

Jan 16, 2012 12:06:39 GMT VE Jason said:

2ohm LR Cartomisers are absolutely fine on a Riva.

However, problems have been reported when using 1.5ohm Dual Coil Cartomisers.

If that helps.

I'd second that.

Been using nothing but 2ohm LR Boges & Kangers on me Riva for months with zero probs.

John

[Deleted]

Gordy you have just reminded me of my old school days and that was mid 70's but I had totally forgotten that equation.
Glad to be reminded though because it means my brain isnt as addled as I thought, well maybe.....

[Gordy]

Jan 16, 2012 17:56:51 GMT @colliwobbles said:

Gordy you have just reminded me of my old school days and that was mid 70's but I had totally forgotten that equation.
Glad to be reminded though because it means my brain isnt as addled as I thought, well maybe.....

ah the old chalk boards hopefully it will be useful for you, specially with your nice new lavatube... the amp limit is a little above 2amps but not sure the exact figure

[DiscoDes]

V
I x R

Which means V (Volts) = I (current in Amps wher 500mA = 0.5A etc) multiplied by the Resistance (Ohms)

Is the way I was taught in college (I have a BTech in Electronics)

Using the same equation (where / means divide by)

I = V / R

R = V / I

[Sandra (aka Chillax)]

wow its all gobblydwultch to me ???

All I know is I=v/R=confusion lucky we have you boys to work out our v's, R's and I's