Vapor423 Posted December 23, 2014 Share Posted December 23, 2014 So I've recently gotten into rda/rba building and I picked up a kangertech ipow2 today with a smok rba and I'm tryin to set up double coil and I cannot get over 1.0 ohm with double coils. I'm using 32ga wire but I have 28ga also. I'm runnin 15w max I can. Any help would be appreciated. Link to comment Share on other sites More sharing options...
Bebop Posted December 23, 2014 Share Posted December 23, 2014 Each coil has to measure 2.0 to get a 1.0 ohm reading when they are doubled. The resistance is cut in half. How many wraps are you doing per coil and what is the reading you are getting? Compenstine and Tam 2 Link to comment Share on other sites More sharing options...
Vapor423 Posted December 24, 2014 Author Share Posted December 24, 2014 I was doin 8 wraps on 5/64 bit comin in at like .8ohm? Link to comment Share on other sites More sharing options...
fishguy1123 Posted December 24, 2014 Share Posted December 24, 2014 Yep, when using dual coils the ohm rateing for each coil will be cut in half when the device reads it. Are you using an Ohms law calculator to get a starting point for your builds? Link to comment Share on other sites More sharing options...
Earthling789 Posted December 24, 2014 Share Posted December 24, 2014 What is the target resistance you are trying to hit? This online calculator will help you to get close.... Link to comment Share on other sites More sharing options...
Vapor423 Posted December 24, 2014 Author Share Posted December 24, 2014 It won't fire anything under 1.0ohm so I'd like to hit about 1.5-1.8ohm Link to comment Share on other sites More sharing options...
Earthling789 Posted December 24, 2014 Share Posted December 24, 2014 (edited) Hmmm... 9 wraps (9/8, actually) of 32ga Kanthal, over a 5/64" bit (two coils) should give ~1.6 Ohms when the coils are in parallel (each coil should be 3.15 Ohm) Edited December 24, 2014 by Earthling789 Link to comment Share on other sites More sharing options...
Vapor423 Posted December 24, 2014 Author Share Posted December 24, 2014 So I used steam engine and put all the information in and told me 7 "full wraps did all that and it's reading 0.7 I don't get what I'm doin wrong Link to comment Share on other sites More sharing options...
Earthling789 Posted December 24, 2014 Share Posted December 24, 2014 Can you post a picture of one of your coils? The 9-wrap info I posted earlier should have hit you right in the 1.6 Ohm range... Tam 1 Link to comment Share on other sites More sharing options...
Vapor423 Posted December 24, 2014 Author Share Posted December 24, 2014 I've already used all my wire up I'll pick some more up and give it another try Link to comment Share on other sites More sharing options...
Earthling789 Posted December 24, 2014 Share Posted December 24, 2014 I just played with the numbers... and if you're using 30ga Kanthal, wrapping each coil 7 times (on a 5/64 drill bit), a parallel-dual-coil resistance would be right at 0.8 Ohms (1.6 Ohms per coil)... so, perhaps you've been using 30ga wire instead of 32ga? Link to comment Share on other sites More sharing options...
Vapor423 Posted December 25, 2014 Author Share Posted December 25, 2014 The wire description is D=0 32mm 18ohm/m Link to comment Share on other sites More sharing options...
fishguy1123 Posted December 25, 2014 Share Posted December 25, 2014 What brand of wire are you using? Is this something you bought at a vape shop? Link to comment Share on other sites More sharing options...
Earthling789 Posted December 25, 2014 Share Posted December 25, 2014 (edited) The wire description is D=0 32mm 18ohm/m D (diameter) = 0.32mm is the same as AWG 28ga, and that is roughly 5.3 Ohm/foot... or nearly 18 Ohm/m So, you have 28ga wire, not 32ga wire, which is why you're coming in so low. You need more wraps to increase the length of wire, and thus increase the resistance. At 5.3 Ohms/ft, you need to have 7.27" of straight wire to equal 3.2 Ohms of resistance. To hit 1.6 ohm (dual coil), you need to have each coil @ 3.2 Ohms... and with 5/64 drill bit, using 28ga wire... you need 21 wraps (and at least 5mm leg length). 11 wraps on the same drill bit will have you at 1.6 Ohms (single coil), and putting two of those in parallel on your atty, and you halve the resistance (0.8 Ohms). Edited December 25, 2014 by Earthling789 Link to comment Share on other sites More sharing options...
Vapor423 Posted December 26, 2014 Author Share Posted December 26, 2014 What brand of wire are you using? Is this something you bought at a vape shop? Yeah I told them I needed 32ga kanthal and I guess they gave me the wrong stuff me being new to this I didn't know but I ordered some stuff this time instead of goin to the vape shop I ordered 100ft of 28ga and 32ga Link to comment Share on other sites More sharing options...
Vapor423 Posted December 30, 2014 Author Share Posted December 30, 2014 (edited) Well I'm sure no one cares but I'm pretty stoked lol my order of actual 32ga kanthal a1 came in and i did the calculations on steam-engine I used a 3/32 drill bit wrapped 7 times and come out to 1.4ohm total on dual coils. I also built a 32ga twisted single coil using a 3/32 drill bit 5 wraps comin to 1.7ohm. I get more vapor and taste from the twisted single coil. I'm using a kangertech iPow 2 on 15w. Now I just need to work on cleaner wraps and get a bigger variable wattage box and I'll be happy. Thanks guys Edited December 30, 2014 by Vapor423 jasonculp and Tam 2 Link to comment Share on other sites More sharing options...
Bebop Posted December 30, 2014 Share Posted December 30, 2014 We care, man. . Glad you got it going Link to comment Share on other sites More sharing options...
Earthling789 Posted December 30, 2014 Share Posted December 30, 2014 Hey, I care Glad you got the right wire and nailed-down the proper resistance. It helps to know your wire! Link to comment Share on other sites More sharing options...
fishguy1123 Posted December 30, 2014 Share Posted December 30, 2014 Good work! Now that you have the right tools to work with it will get much easier. Link to comment Share on other sites More sharing options...
Tug Posted January 5, 2015 Share Posted January 5, 2015 Twisted single coils are my favorite! Well I'm sure no one cares but I'm pretty stoked lol my order of actual 32ga kanthal a1 came in and i did the calculations on steam-engine I used a 3/32 drill bit wrapped 7 times and come out to 1.4ohm total on dual coils. I also built a 32ga twisted single coil using a 3/32 drill bit 5 wraps comin to 1.7ohm. I get more vapor and taste from the twisted single coil. I'm using a kangertech iPow 2 on 15w. Now I just need to work on cleaner wraps and get a bigger variable wattage box and I'll be happy. Thanks guys Link to comment Share on other sites More sharing options...
Jeffb Posted January 6, 2015 Share Posted January 6, 2015 Dear Tugboat: You need to respond outside the quotes in order for your response to be easily read. Link to comment Share on other sites More sharing options...
Tug Posted January 6, 2015 Share Posted January 6, 2015 That's the only way it let's me respond from my android.I just won't respond anymore. Link to comment Share on other sites More sharing options...
Jeffb Posted January 6, 2015 Share Posted January 6, 2015 That's the only way it let's me respond from my android.I just won't respond anymore. Oh stop it Link to comment Share on other sites More sharing options...
fishguy1123 Posted January 7, 2015 Share Posted January 7, 2015 Tug, are you using tapatalk? Link to comment Share on other sites More sharing options...
Tug Posted January 7, 2015 Share Posted January 7, 2015 No.I've tried it and I did not like it. Link to comment Share on other sites More sharing options...
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