Formula for calculating no. of turns

[VK3LU]

Does anyone have the metric formula for calculating number of turns, given required inductance and wire diameter, coil diameter, air wound single layer.
I have doubts about the one I am using re its accuracy.

Cheers
Nev

[VK2EFM]

Hi Nev,

Give this one a try....
http://hamwaves.com/antennas/inductance.html

73
Allan
VK2EFM

[VK3LU]

Allan,
Not quite what I am after.
I want a formula that calculates the number of turns given the diameter of the coil, the diameter of the wire, and the inductance required.
In other words, I know the inductance...how many turns on a coil diameter of x and wire diameter of y and a pitch of z.

Cheers
Nev

[VK2EFM]

Hi Nev,

I left out the some trial and error might be required....

Ah well.

Allan

[VK5TM]

I think this may be the one you are after:

http://www.pronine.ca/coilcal.htm

or this one:

http://www.k7mem.com/Electronic_Noteboo ... ldsgn.html

[VK3AUU]

http://zpostbox.ru/how_to_calculate_inductors.html

[VK3LU]

Thanks all for your suggestions.
Terry, the first one you suggested ( the pronine one ) is the most suitable but unfortunately it is online. I compared it with the one I use and the results are almost identical so I can stop looking.

Cheers
Nev

[ZL3RC]

Thanks all for your suggestions.
Terry, the first one you suggested ( the pronine one ) is the most suitable but unfortunately it is online. I compared it with the one I use and the results are almost identical so I can stop looking.
Cheers
Nev

It's Java Script so just grab the source and run it in a saved page locally. I haven't had a close look but should be possible to do quite easily.

Give me an email if you have problems.

Roger ZL3RC

[VK3LU]

Thanks Roger,
I have successfully saved the whole page and it works

Nev