[TowerTalk] Inverted L on three low bands

[Nick Pair]

Tom Osborne <w7why at verizon.net> wrote:     Hi Nick

Sounds easy and good. One question--the vertical part of my 160 'L' goes up 
in a tree about 70 feet. What would I have to do, go up about 40 feet and 
add a 25 foot wire there for 80?
Tom W7WHY


O.K. Tom,
   
  I now see all that is involved with your particular setup. Previously I had assumed(there is that word again !) that you had less than 1/4 on 80 vertical.
  Sounds like you have 70 vert. and about 70 or so horiz.
   
  Try to keep the vert. wire as far from tree trunk as possible as trees eat rf as well as they do kites.
   
  What you describe would work but if you can lower the point where the antenna makes it right turn, you can make the vert. section a fan type radiator with the spread of about 4 inches between each or a triangle shape with round insulators. 
   
  Another way to use what you have is to force feed the L on 40 and 80 with a ATU. The imped. on 80 would be somewhere in the low 4000's and on 40 somewhere in the mid 1000's. Use of radials for each needed with more better if on ground and 4 or so O.K. for above the ground a foot or more. This gives you some gain over the first method but at the expense of a base mounted ATU. A dc ground is needed as well as your radials.
   
  Good Luck. 
  Nick
  WB7PEK

 		
---------------------------------
Yahoo! Music Unlimited - Access over 1 million songs.Try it free.