3/4 4/5 8675/309

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spraintz

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when you wrap a spiral coil, look at the coil from one side and it will have 3 coils and then look at it from the other side....4 coils = 3/4 wrap

It's a more accurate way to describe how many wraps you truly have. The idea is if you tell somebody to make a 4 coil wrap one person might make a 3/4 wrap and another might make a 4/5 wrap depending on how they look at it.

make sense?

4/5 wrap:

4
20121016_095840.jpg


5
20121016_095825.jpg
 
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Lance_Wallen

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shouldn't we be counting 'coils' by 1 full circumference? Which would make that a 4 coil set up not a 5. 1 coil should be 1 time around the wick... I guess that's what confused me. When I look at both pictures I see 4 coils, sure I see 5 instances of wire in the second picture but it's still 4 coils. Who am I to fight the tide, I'll just assume when I see '4/5' that they mean 4 coils, 7/8 means 7 coils, etc.
 

spraintz

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:) I agree it's a lil weird, I thought the same thing when I got into rebuildables. Sometimes you just can't tell a given person's perspective so at least a denotation of "4/5" it technically more accurate when describing a coil wrap over the internet. Heck, on some of my RBA's I wrap 4.25 or 4.75 coils based on how the posts are positioned but forget trying to describe that in text to somebody who is just starting to make a coil and doesn't know....:p

But yes, for me I consider a 4/5 wrap 4 coils.....
 

bubbajoe72

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This will give you an approximation but if you really want to get technical, it's all about the length of wire from post to post so one person's 4/5 wrap may be another person's 6/7 wrap if they use different sized wicks but the length is the same.

That's why i have a set of alligator clips hooked up to a multimeter and move the clips on the uncut wire until i get the desired resistance, cut, then wrap.
 
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