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Old 2nd July 2005, 10:37 PM   #1
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Default calculating windings for mH

Hi guys i searched and found useful links to how to calculate them but i dont have an Ai value for my bobbins so i can t figure it out

if someone could look at this photo of the bobbins ( diameter = 11mm ,height = 18 mm ) and give me a ball park figure on how many turns to get .6 mH and .3 mH i would appreciate it. I am jury rigging a winder now with a adjustable drill and some screw drivers. This is just to tide me over till solen stuff arrives.

Thanks i appreciate it.
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Old 3rd July 2005, 01:24 AM   #2
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oooops photo would be nice i guess. These are what i was going to wind them on .3 and .6 mH ..... apparently they have a value (the bobbins) but i dont know what it is or what the formula to calculate their value is. So again , if someone is extremely familiar with winding inductors and could tell me approx how many turns that dia and height with 20 guage wire will make those values i would love you for the rest of the day.
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Old 3rd July 2005, 02:40 AM   #3
Mark Kravchenko --- www.kravchenko-audio.com
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Default If you want a small program that will work drop me a line

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Old 3rd July 2005, 02:46 AM   #4
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Awesome dude i just e-mailed you. i am sitting here looking at these bobbins and nothing open to go get a measuring meter and start winding and guessing
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Old 3rd July 2005, 02:55 AM   #5
Mark Kravchenko --- www.kravchenko-audio.com
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Tell me what you come up with

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Old 3rd July 2005, 03:05 AM   #6
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i dont understand what you mean ? Did you send me something ? because i didnt see it or get it if you did . Sorry.
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Old 3rd July 2005, 03:06 AM   #7
Mark Kravchenko --- www.kravchenko-audio.com
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I sent it again through gmail. You should have it in a minute or two.

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Old 3rd July 2005, 03:07 AM   #8
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Got an e-mail but nothing in it except your instructions


Edit. Ok thank you
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Old 3rd July 2005, 05:05 AM   #9
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i found an online java one that you just have to adjust outside diameter to approximate winding on a give inner diameter air core. Pretty sweet but damned annoying to find

http://www.oz.net/~coilgun/mark2/inductorsim.htm
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Old 3rd July 2005, 01:12 PM   #10
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Thank you anyway for the attempt Mark but nothing came through. No worry i found an online Java based one that seems to be geared towards idiots [me]
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