[Elecraft] Slightly OT: non-resonant wires

[Barry N1EU]

A 53ft end-fed wire has a radiation pattern that varies all over the map as
you go up in frequency above 10MHz.

For 40-10M, I much prefer a 44ft center-fed doublet which has a broadside
pattern on all bands.

Barry N1EU

On Tue, Feb 9, 2016 at 2:38 PM, Lynn W. Taylor, WB6UUT <
KX3 at coldrockshotbrooms.com> wrote:

> I don't believe there are magic lengths.
>
> There are however lengths that are decidely non-magical, and if you want
> something that works on 40, 30, 20, 17, 15, 12 and 10, there are many
> lengths that are non-magical.
>
> That's why I did not ask "what is a good length?"  There is a pretty good
> reference here: http://udel.edu/~mm/ham/randomWire/
>
> Short of buying a 100 foot tape (or a longer one), what methods do people
> use to reasonably accurately measure 53 feet (or 72 feet, or 136 feet)?
>
> Thanks -- Lynn
>
>
> On 2/9/2016 11:06 AM, 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 <
>> KX3 at coldrockshotbrooms.com> 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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