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## Re: [TowerTalk] Cable on a reel using a formula?

 To: "Towertalk Reflector" Re: [TowerTalk] Cable on a reel using a formula? "David Hachadorian" Thu, 6 Oct 2005 20:18:21 -0000
 ```Google is amazing: -------------------------- Suppose the reel has hub diameter Di, outside diameter Do, and width W. Then the volume of wire on it is V = pi(Do^2 - Di^2)W/4 Suppose you have a wire with length L and square cross-section with side Dw (the diameter of the wire). Its volume is V = LDw^2 Setting these equal, we get LDw^2 = pi(Do^2 - Di^2)W/4 and we can solve to find L = pi(Do^2 - Di^2)W/(4Dw^2)-------------------------------This formula assumes zero airspace in the windings, so it should overstate the length somewhat.Dave Hachadorian, K6LLYuma, AZ _______________________________________________ See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA. _______________________________________________ TowerTalk mailing list TowerTalk@contesting.com http://lists.contesting.com/mailman/listinfo/towertalk ```
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