[600MRG] Very low halfwave dipole for 630m

[Edward R Cole]

Yep, no problem 10m high = 33 feet and 262m long = 860 feet.  Since a 
square acre is 204x204 feet one only needs about 4-1/2 acres of land 
(or very accommodating neighbors).

My inverted-L is 43 feet high by 122 fee long; radials are two at 50, 
one 70 and one 110 foot long (all could fit on a single acre of 
land).  How many city dwellers own an acre?  How many own 4-1/2 
acres?  This is a fine idea for you farmer-hams with your back-40 
hobby farm.  My 1.75ac lot is assessed at $10.6K (my Dad's 110ac farm 
in MI was about $150/ac for the land).

I tried out a 960-foot BOG (only a half wave long).  Noise was 20-dB 
less than the inverted-L and so were the signals.  Bad  idea 
(neighbor rolled my BOG up when he needed access to his land to do 
some logging).   Then I tried a shorter BOG confined to my 1-3/4 acre 
(no better).  So forget wires on ground for me.

I am more interested in trying some small loops or "flags" for Rx.

but my next purchase will be two new synthesizer boards ($400) for my 
K3 which will permit operations below 490-KHz.

73, Ed - KL7UW
.
At 05:28 AM 3/17/2015, sbjohnston at aol.com wrote:

>
>My inverted-L antenna continues to perform well, but I came across 
>this interesting article on using a very low halfwave dipole for 
>operation on the 630m band:
>
>https://dl.dropboxusercontent.com/u/19882028/MF/A%20full%20size%20dipole%20for%20the%20630%20m%20band.pdf
>
>If ground conductivity is very low I bet one could just lay it on the ground.
>
>
>
>
>Steve WD8DAS
>
>sbjohnston at aol.com
>http://www.wd8das.net/
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73, Ed - KL7UW
http://www.kl7uw.com
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