Micro coils and ohms description

[Sirius]

Thanks, Sirius. New to dual-coils. I'll go do my homework. Actually, I'm just curious because the RM2 on the Reo is just the cat's meow for me with 1.0 ohm single coils.

Look into Twisted 28ga single coil. I ran my RM2 with that at around 1.0 Ω .. 10 wraps twisted 28ga on a 5/64th drill.

 

[thewomenfolk]

Ditch that 16ga and rustle through a tool box and pull out a 5/64th drill. 10 wraps each of 28ga will get you right at 1.0 Ω Top of my head says 12 each will put you a bit over 1.2 Ω

Is 5/64 about the diameter of a Q-tip?

 

[Sirius]

Is 5/64 about the diameter of a Q-tip?

I had to go measue a Q-Tip ..Nooo that's more like 11/64th too big. Huum no drills? I'll think about what you could use then.

 

[Sirius]

How about one of these blunt tip needles that come with DIY syringes..the big ones. You have one? That's pretty close.

 

[nerak]

Is 5/64 about the diameter of a Q-tip?

A toothpick maybe? Or large sewing needle.

 

[thewomenfolk]

How about one of these blunt tip needles that come with DIY syringes..the big ones. You have one? That's pretty close.

View attachment 374372

That's what I had been using, a 16G luer needle. But I enlarged the coil because you said to. haha I also have the 18G luer needle but it's smaller than the 16G. So is the 16G needle about 5/64?

 

[Sirius]

That's what I had been using, a 16G luer needle. But I enlarged the coil because you said to. haha I also have the 18G luer needle but it's smaller than the 16G. So is the 16G needle about 5/64?

Ha! So sorry Idk about needle sizes because I suck really bad at DIY. I had a few laying around and gauged it, and yes that one is close enough.
Boggles the mind sometimes just converting standard to metric and I'm old school when it comes to tools. I wouldn't have suggested the twisted coil either but it's one of the best ones out there. Maybe your SO has tools and can twist some 28ga for you? If so you should really try that coil.

 

[mommabird62]

Look into Twisted 28ga single coil. I ran my RM2 with that at around 1.0 Ω .. 10 wraps twisted 28ga on a 5/64th drill.

Glad I saw this! I still have not gotten around to making a twisted and have been meaning to. Thanks Sirius May give this a shot for my next coil. Do you calculate the ohms in half like you would when doing duals since there are two strands of wire in the end result?


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Mommabird62

 

[Sirius]

Glad I saw this! I still have not gotten around to making a twisted and have been meaning to. Thanks Sirius May give this a shot for my next coil. Do you calculate the ohms in half like you would when doing duals since there are two strands of wire in the end result?


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Mommabird62

It works out the same ... yes Momma. I'm so use to doing it that it's stuck in my head now though. I just twist and coil. LOL

 

[mommabird62]

It works out the same ... yes Momma. I'm so use to doing it that it's stuck in my head now though. I just twist and coil. LOL

LOL I'm getting there I also have a little piece of notepaper in my build kit that I jot down the coil builds that I make and like. A cheat sheet per say


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Mommabird62

 

[Sirius]

Spreadsheet updated HERE

Bumping up for references to Ohm per inch.

 

[rudy4653]

That's what I had been using, a 16G luer needle. But I enlarged the coil because you said to. haha I also have the 18G luer needle but it's smaller than the 16G. So is the 16G needle about 5/64?

5/64" drill bit=1.98mm
16G luer needle = 1.65mm
1/16" drill bit = 1.58mm
18G = 1.27mm
3/64" = 1.19mm

I use 16G luer with my 2mm RxW fits perfect!

 

[Sirius]

5/64" drill bit=1.98mm
16G luer needle = 1.65mm
1/16" drill bit = 1.58mm
18G = 1.27mm
3/64" = 1.19mm

I use 16G luer with my 2mm RxW fits perfect!

5/64" drill bit=1.98mm

Thnx Rudy..I have almost always used either a 2mm or 5/64th drill on my coils. Not enough difference to make much difference and has so far served me well using 28ga.

 

[mommabird62]

I have 16g and 14g ( occasionally 18g) luer lock blunt needles that I use most of the time. They are easy for me to handle. I guess that all of those years as a vet tech left me feeing at home with them


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Mommabird62

 

[ancient puffer]

Bumping up for references to Ohm per inch.

I've updated the coils spreadsheet to include a table at the bottom that lists various gauge Kanthal A-1 wire, giving the Ohms per foot, per inch and per centimeter.

Take the values for 31 and 32 gauge with a grain of salt, doesn't seem right to me, but that's what the Temco site said.

 

[Sirius]

I've updated the coils spreadsheet to include a table at the bottom that lists various gauge Kanthal A-1 wire, giving the Ohms per foot, per inch and per centimeter.

Take the values for 31 and 32 gauge with a grain of salt, doesn't seem right to me, but that's what the Temco site said.

Thnx Puffer!

 

[mommabird62]

TY puffer! this is the one that I like to use-now updated


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Mommabird62

 

[MattB101]

I've updated the coils spreadsheet to include a table at the bottom that lists various gauge Kanthal A-1 wire, giving the Ohms per foot, per inch and per centimeter.

Take the values for 31 and 32 gauge with a grain of salt, doesn't seem right to me, but that's what the Temco site said.

It looks to me like the resistance per inch is considerably lower than the resistance per centimeter. I might be reading it wrong but, isn't an inch about 2 centimeters or slightly less. The resistance per inch should be almost double the resistance per centimeter. Correct?

Sent from my Galaxy Note 2 Android phone on a keyboard that waaayyy too small (or my thumbs are waaayyy too big).

 

[KenD]

It looks to me like the resistance per inch is considerably lower than the resistance per centimeter. I might be reading it wrong but, isn't an inch about 2 centimeters or slightly less. The resistance per inch should be almost double the resistance per centimeter. Correct?

Sent from my Galaxy Note 2 Android phone on a keyboard that waaayyy too small (or my thumbs are waaayyy too big).

Looks that way to me too. An inch is about 2.54 cm and a foot about 30 cm.

 

[ancient puffer]

It looks to me like the resistance per inch is considerably lower than the resistance per centimeter. I might be reading it wrong but, isn't an inch about 2 centimeters or slightly less. The resistance per inch should be almost double the resistance per centimeter. Correct?

Sent from my Galaxy Note 2 Android phone on a keyboard that waaayyy too small (or my thumbs are waaayyy too big).

Aaack! Good catch, some idiot divided the resistance per FOOT by 2.54 *sigh*

Fixed it, thanks for catching it!