[Elecraft] Inverted L for 160 meters

[Edward R Cole]

Originally, I was looking to hang a half-square on 80m as accidently 
ended up with two 50-foot towers spaced 130-foot apart.  But then 
around 2011, I got interested and joined the ARRL 600m Experimental 
Group and was looking at 600m antennas.  With just under 2-acres 
(200x300 foot). there was just not enough horizontal room for an LF antenna.


Revising my plans I made a 43x122 foot inverted-L.  I tripled the 
vertical wires and doubled the horizontal wires to get a bit more 
bandwidth (5-KHz at 495-KHz).  I laid out three radials on the ground 
using 2-foot wide chicken wire and fourth radial was shield of my 
120-foot run of 1-5/8 inch Heliax to the tower holding the vertical 
section.  All much shorter than 1/4 WL.
<http://www.kl7uw.com/630m.htm>http://www.kl7uw.com/630m.htm

Efficiency at 475-KHz is terrible (4%) with such a short vertical but 
it hears well using basically ground-wave prop out to 
1100-miles.  I've copied Rudy-N6LF several times over much longer 
path into Oregon from AK (1647 miles).

I tried a BOG but though a lot quieter also signals were much less 
(500-foot not long enough to work well as a Beverage on 600m)

With some changes on my base loading coil the invert-L could be used 
on 160m (maybe some day??).

Sidenote to 6m ops:  My dual 7-element LFA yagi array is functional 
for FT8 (Es) or JT65 (eme) or MSK-144 (ms); will have 1000w QRV in 
few more days (after testing).

73, Ed - KL7UW
   http://www.kl7uw.com
Dubus-NA Business mail:
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