[TowerTalk] Tips for Modelling swaged antenna tubing sections

[Steve London]

Jim Lux wrote:

but does the model actually show much difference? One can get way down in the 
weeds with this - put a tapered segment in that's 1 cm long, etc. But if the 
wavelength is 20 meters, a 1 cm transition is 0.0005 wavelength. I'd worry more 
about numerical instability than model accuracy at that point.

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I have been going through the same exercise with a homebrew 15 meter beam. Can 
models like N6BV's YW be trusted for segments that are a small fraction of a 
wavelength ? What about the Leeson equations/spreadsheet for converting to an 
equivalent, single-diameter, cylindrical element ?

Some examples from my modeling:

- The 1/2" wide, 0.1" thick, 3.5" long, aluminum straps that connects together 
the parasitic element halves ?

- The 3" long swaging sections ?

73,
Steve, N2IC