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VK2ZRG > TECH 03.09.08 21:44l 21 Lines 603 Bytes #999 (0) @ WW
BID : 2606_VK2ZRG
Read: GUEST
Subj: Inductance of a straight wire
Path: IZ3LSV<IK2XDE<DB0RES<ON0AR<F1ZNR<F4BWT<YO6PLB<CX2SA<VK7AX<VK2TGB<
VK2IO
Sent: 080831/0548Z @:VK2IO.#SYD.NSW.AUS.OC #:32448 [Castle Hill] FBB7.00i
From: VK2ZRG@VK2IO.#SYD.NSW.AUS.OC
To : TECH@WW
VK2ZRG/TPK 1.83d Msg #:2606 Date:31-08-08 Time:5:38Z
Hello to the technical minded,
The formula for inductance of a straight round wire is this, for length
and wire diameter in millimetres (LN is natural logs).
Microhenrys = 0.0002*Length*(LN((4*Length)/Wire_diameter)-0.75)
The 0.0002 number become 0.00508 for the ancient inch measurements and
0.002 for centimetres.
Can anyone tell me where this formula originated please. i.e. Who devised
it, and when and where it was first published.
73's from Ralph VK2ZRG@VK2WI.#SYD.NSW.AUS.OC
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