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[TowerTalk] Multiband 1/4 wave sloper

To: towertalk@contesting.com
Subject: [TowerTalk] Multiband 1/4 wave sloper
From: ARTHUR BERNSTEIN via TowerTalk <towertalk@contesting.com>
Reply-to: ARTHUR BERNSTEIN <n2ka@verizon.net>
Date: Thu, 20 Nov 2025 00:22:35 -0500
List-post: <mailto:towertalk@contesting.com>
I’ve noticed some discussion regarding multiband fan dipoles and those using 
inductors mislabeled as traps.
i have such an antenna I’ve not used in years-Alpha Delta DX A which is a two 
wire half sloper. One wire is a 1/4 wave on 80, the other leg is for 40 and 160 
simulating a 1/4 wave on each band which has a close wound coil on a coil form. 
The 40 meter section was about 30 ft and after the coil additional wire to 
.resonate it on 160.
What I want to do is just use one wire for 80 and 160. I don’t know the value 
of the inductor. Alpha delta doesn’t know either. With roughly 65 ft for 80 
could I resonate it on 160 with wire added after the coil? I realize if doable 
will likely be narrowband which I don’t care as I use primarily CW or ft8 on 
those bands. Inductance of coil and length could be tricky.
Art., N2KA
Sent from my iPhone

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