[Elecraft] KX1 # 2047 comes alive!

[Sante - IK0HBN]

Thanks to all who replied to my post. This evening I'll try to erect 
something longer. Please stay tuned, as yesterday evening K9EU (dig 
me out on 20 giving a true 559! Not bad for a box with 3.4 watt!! 
I'll try to have 2 antenna, one long 66 ft for 80 and another of 44 
ft with 33 ft of counterpoise.
CUL es thanks agn.
Sante, IK0HBN

At 03.21 06/08/2008, you wrote:
>Sante,
>
>Although you may be able to load a small antenna on 80 meters, the 
>efficiency will diminish as the antenna gets physically smaller (one 
>cannot defeat the laws of physics).
>I would suggest that you carry along extensions.that you can clip on 
>to extend the physical length of your radiator to something in the 
>vicinity of 135 feet total (radiator plus "counterpoise").
>
>Whether the extensions are deployed at height or simply strung out 
>near the ground will not make much difference - keep the antenna 
>center high because that is where the major portion of the radiation 
>takes place.
>
>Picture a half wave dipole with the center of that half wave at the 
>highest point you can manage.  That dipole can be fed at the end, 
>the center, or any point in between with the feedpoint impedance 
>varying from about 50 to 75 ohms (for center fed) to 4000 ohms (for 
>end fed) - you must choose the 'best' arrangement for you depending 
>on what you anticipate your portable physical constraints might be 
>(horizontal space, vertical space, etc.).  Consider a vertical 
>radiator as half a dipole - you need radials to complete the dipole 
>- if the radials are physically opposing, the horizontal radiation 
>will cancel and all the radiation will be only vertically polarized 
>- a single radial will result in both vertical and horizontal 
>radiation - either will work, but the distance covered will vary 
>depending on propagation conditions existing at the time.
>
>73,
>Don W3FPR
>
>
>Sante - IK0HBN wrote:
>>Hi everybody,
>>I just finished to assemble my KX1 with autotuner and 30/80 option 
>>and I have one question for you:
>>"As the the manual has been written for 20-30 and 40 meters bands, 
>>the lenghts for a long wire are given for those bands. How long 
>>should it be for having a good compromise even on 80 mtrs? I'd like 
>>to have just one wire for backpacking"
>>
>>Thanks in advance
>>Sante, IK0HBN