Watch out starsky has an RTA!!

[starsky]

Chaps; I'm now in possession of a billow v2 (thanks jabz) and other than recoiling my old protank coils I've never used an RTA.

I've downloaded a couple of calculators but I'm getting a bit confused (especially when it tells me I need 72 turns!!)

I personally enjoy a restricted lung hit from a higher resistance coil.

I have some kanthal A1 at 0.23 mm and the billow has a dual coil setup. Can I use this kanthal and if so how many turns would I need to achieve a total resistance of say between 1.4 and 1.6 ohm?

 

[starsky]

Just to add - I have a coolfire 4+ and am fine checking resistance with a multimeter

I've had a play around with steam engine but how do I know what inner core diameter is going to be? I can't see an option for 'wrapped round a cocktail stick or small screwdriver' ;-)

 

[Ment]

I reckon about 10 wraps each coil round a cocktail stick will do it.

 

[Mr Numpty]

8 wraps around a 2.5mm rod will get you 1.4 ohms.

 

[Ment]

But seriously.......get a coil jig or a set of precision screwdrivers which have the diameter on them.

I wouldn't get too aggy about getting the ID just right, but it's best if you do.

 

[holyjuice]

But seriously.......get a coil jig or a set of precision screwdrivers which have the diameter on them.

I wouldn't get too aggy about getting the ID just right, but it's best if you do.

This. I seriously cannot recommend these enough, an absolute perfect coil every single time:

https://www.amazon.co.uk/Koiler-】LAPROBING-Coiling-Builder-Winder/dp/B01E5GLIKU/ref=sr_1_1?ie=UTF8&qid=1484696885&sr=8-1&keywords=coil+winder

 

[Tubbyengineer]

OK so a quickie on using Steam Engines coil wrapping page...
Start at top left, Set Metric Units (we're in the UK so mm are what we use)
Select Material and profile - In your case Kanthal A1 and Round
Select wire diameter in AWG or mm - in your case 0.23mm
Select setup - In your case Dual coil
Select target resistance - In your case 1.5 ohms
Now move on to the second column and select inner diameter I use 2.5mm - I'd reccomend getting either a coiling tool or a set of precision screwdrivers which have their size marked on the case).
leave the leg length as it is - it doesn't make a terrible amount of differnce in this kind of build.

Now in the Results table you'll have

These are the results PER COIL - you need to make TWO of these. So two coils of 9 wraps if the legs both point in the same direction or 8.5 wraps if the legs point in opposite directions.
The "Heat Flux" indicates how "Hot" the vapour will be at a particular wattage - you can vary the wattage and the little box will change colour starting blue for cold - through green, yellow and red for very hot...

 

[starsky]

Brilliant- thanks guys