[Elecraft] Random wire lengths for antennas

[Walter Underwood]

Balun Designs has a similar list of wire lengths hidden away as a link from the page for their 9:1 unun. 

http://www.balundesigns.com/content/Wire%20Lengths%20for%204%20and%209-1%20ununs.pdf <http://www.balundesigns.com/content/Wire%20Lengths%20for%204%20and%209-1%20ununs.pdf>

They also make excellent baluns (and ununs) at good prices. Putting their “QRP” balun (handles 250W) on my home dipole reduced the received noise by 6 dB.

http://www.balundesigns.com/model-9130-qrp-9-1-unun-1-5-54-mhz-300-watts/ <http://www.balundesigns.com/model-9130-qrp-9-1-unun-1-5-54-mhz-300-watts/>
http://www.balundesigns.com/qrp-model-1110-1-1-isolation-choke-balun-1-54-mhz/ <http://www.balundesigns.com/qrp-model-1110-1-1-isolation-choke-balun-1-54-mhz/>

wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)

> On Jan 29, 2017, at 4:16 AM, a45wg <a45wg at sy-edm.com> wrote:
> 
> You can download some code I wrote for this at https://github.com/timseed/rnd_Wire.git <https://github.com/timseed/rnd_Wire.git> 
> 
> For those people who just would like “some data” this is the output of the program listed above. I have not tried this data in EzNEC etc. The Spectrum I was checking against from 160m to 10m including full 80m/40m as well as 30m and 60m bands.
> 
> 
> 
> Possible good length at 6.0M 19.69Ft
> Possible good length at 6.99M 22.94Ft
> Possible good length at 8.26M 27.09Ft
> Possible good length at 10.1M 33.14Ft
> Possible good length at 12.01M 39.39Ft
> Possible good length at 13.99M 45.89Ft
> Possible good length at 18.01M 59.08Ft
> Possible good length at 20.2M 66.28Ft
> Possible good length at 24.01M 78.77Ft
> Possible good length at 24.77M 81.27Ft
> Possible good length at 27.75M 91.06Ft
> Possible good length at 29.56M 96.98Ft
> Possible good length at 33.03M 108.36Ft
> Possible good length at 34.97M 114.72Ft
> Possible good length at 40.41M 132.56Ft
> Possible good length at 44.34M 145.47Ft
> Possible good length at 45.46M 149.13Ft
> Possible good length at 48.95M 160.61Ft
> 
> 
> Hope this helps,
> 			Regards
> 
> 				Tim A45WG
> 
>> On Jan 29, 2017, at 4:08 PM, James Rodenkirch <Rodenkirch_LLC at msn.com> wrote:
>> 
>> Emory - before you cut any wire, go to the below url and peruse all of the info - unless you desire to operate have a 1/2 wavelength antenna (not a bad thing) and have a 1/2 wavelength tuner for the band of interest, mgo to the below url for recommended wire lengths that avoid 1/2 wave antenna lengths for the your bands of interest.  
>> 
>> http://www.hamuniverse.com/randomwireantennalengths.html
>> 
>> 71.5/72 de Jimm Rodenkirch K9JWV
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