Topband: Effect of trees on vertical elements?

[donovanf at starpower.net]

Hi John, 


Horizontal polarization isn't very effective on topband except for local 
QSOs. It would be far better if you could install an inverted-L vertical 


73 
Frank 
W3LPL 

----- Original Message -----

From: "John Harper" <johnae5x at gmail.com> 
To: topband at contesting.com 
Sent: Thursday, August 15, 2019 11:57:49 PM 
Subject: Topband: Effect of trees on vertical elements? 

I'm thinking of installing an end-fed half-wave dipole as an "inverted U" 
for 160m. My tree geometry is such that the antenna would be fed at the 
base of a tree, then go up it to 120 feet. Then about 90 feet to another 
tree and down it to complete the length of the antenna. 

Would the close proximity of the vertical portions to the two trees 
adversely affect the antenna's performance? 

Last year I used my 80m dipole-110-foot vertical feedline as a top-loaded 
vertical on 160 - it worked well as a transmitting antenna but was a poor 
receiver due to noise so looking for another option. 

Tnx/73, 

John AE5X 
https://ae5x.blogspot.com 
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