Start with a sailboat sitting in salt water with the electrical system
and masts bonded and tied to suitable grounding plates on the hull.
This is all normal for most shipboard installations. A random length
of wire can be matched to effectively transfer RF from the transmitter.
Precise length measurements are not necessary. Keep ground loss and
other component loss to a minimum and one has a rather decent antenna.
Thus one uses an insulated back stay on the vessel.
73
Bob, K4TAX
On 2/9/2016 1:06 PM, Barry N1EU wrote:
I think the only important measurement is that it avoids being near a half
wavelength on any bands. Are there really "magic" lengths to be used with
9:1 xfmr into a tuner? I'm skeptical.
73, Barry N1EU
On Tue, Feb 9, 2016 at 1:50 PM, Lynn W. Taylor, WB6UUT <
[email protected]> wrote:
>Only a bit off-topic, since I have a KX3 w/tuner and a 9:1 balun to go
>with it.
>
>I know how to trim a resonant antenna to the correct final length. I also
>understand why truly "random" wires don't necessarily work.
>
>The recent post about shipboard operations near Antarctica said they're
>using a 53' wire.
>
>How do you guys measure an antenna like this? I assume it can be a few
>inches off, but....
>
>73 -- Lynn
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