My variable Upper & Outer
with Coghlan´s Laundry reel
working from 40m to 10m without ATU
On most SOTA-activations, i´m using a portable antenna called upper and outer, described from W9SCH
and with fine illustration by DL2LTO.
My problem was, each band uses other length of wire, you see this on Uli´s Homepage.
Now, month ago i saw the new announcement of an CrankIR
from SteppIR and an interesting antenna of HamRadioFun.com.
My creative brain combined both models to one Antenna i´m using now since several month.
I organised two coghlan loundry reel, removed the cord and mounted about 10m (33ft) of copper litz (bare)on each reel.
I mounted both reel on an holder who i put on my Fisching-pole and both litz are routed through brass tubes which are
connected to the BNC-connector. For each band, i adjusted the length of each litz and marked it with thrink tubing i mounted before
installation. So now, i can adjust the antenna for each band without wire changeover, only by tuning the length of the litz by
redirection with an cord (black on my pdf). You could find my drawing here. A german presentation
also in this pdf
Here some pictures of my construction
||mountingplate mounted bottom-view
||mountingplate mounted top-view
||my pdf, see text
||Picture of DL2LTO (Uli)
©Peter Altschul, Wängi