calculating windings for mH

[Madmike2]

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.

 

[Madmike2]

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.

 

[Kravchenko_Audio]

If you want a small program that will work drop me a line

mwmkravchenko@hotmail.com

Mark

 

[Madmike2]

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

 

[Kravchenko_Audio]

Check your mail Mike!

Tell me what you come up with

Mark

 

[Madmike2]

i dont understand what you mean ? Did you send me something ? because i didnt see it or get it if you did . Sorry.

 

[Kravchenko_Audio]

Hotmail sucks!

I sent it again through gmail. You should have it in a minute or two.

Mark

 

[Madmike2]

Got an e-mail but nothing in it except your instructions


Edit. Ok thank you

 

[Madmike2]

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

 

[Madmike2]

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]

 

[rabbitz]

Download this one as it's a little beauty.

http://members.optusnet.com.au/~audiosoft/inductor.exe

 

[Madmike2]

cool thanks i grabbed it . Still havent as yet found a multimeter that reads inductance. Radio Shack(the SOurce) doesnt even carry that stuff any more. Going into electric avenue China Town North) tommorow in Toronto and track one down, and a winder if possible. I broke down and bought solid core inductors in needed values today at Active Surplus here in T.O. I dont know if thats going to sound Cackkk or not.

 

[Kravchenko_Audio]

Finally some sucess!

If first you don't succeed try try again!

http://www.kotinet.com/oh8jep/soft.html

This WILL get you the program that I use. Hope it is what you want.

Mark

 

[Madmike2]

Oh ya ! thats sweet better then the java one i was using. Going to get a meter tommorow that reads inductance then i will go about making what i need. Thanks again man, thats a beastly program.