Topband: inv. L

[Carl Braun]

Art

I use two 65' verticals on 40/80/160.  HALF WAVE tall (electrically) and spacing on 40m with LC network at the base to tune...QUARTER WAVE tall on 80 with same spacing and EIGHTH WAVE tall and spacing on 160m.  

Both verticals are fed in phase on 160 now but I have plans to add an LC phaser that should allow for some directivity.  Current pattern seems to be omni with the verticals being so close to one another.  I did try inserting a delay line into the scheme with some (2-3 db) directivity seen and may continue to experiment with that angle until I build the LC Phaser.

AG6X



-----Original Message-----
From: Topband [mailto:topband-bounces at contesting.com] On Behalf Of Art Snapper
Sent: Monday, October 17, 2016 8:17 AM
To: 160
Subject: Topband: inv. L

I was considering adding a second vertical element to my 160 inverted L.
This one would be roughly a quarter wave tall for use on 80.

I tried modelling in Eznec, but wasn't comfortable with the results. I may have screwed it up.

Has anyone tried it for real? Is it a big compromise on either band? Would a switch at the feedpoint have any benefit?

My inverted L has about 50 radials.

73
Art NK8X
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