Antenna has weight of 900 gram. SWR is:
at 430-MHz =1.2:1, at 435-MHz =1:1, at 440-MHz=1.3:1 SWR was metered
by device SWR-121. If you will use boom
made of iron
L-plate having not the same dimensions you would do correction
lengths of antenna elements. I want to pay attention, that the
antenna is more laborious than YAGI, but it work much better.
When an antenna
is intended for mountains it must follow such additional requirements
1. Light weight.
To have folding design and to take a little
place in a backpack.
Antenna should be conveniently
to hold in a hand, to fasten to a tree or stick. .
Tolerance to a dirty, water and snow.
to repair in field conditions.
the boom of the trip antenna is made of a wooden
drying by oil. Perimeter of all ovals is increased on 20-mm compare
to previous design. All struts are made from un- foiled PC-board. Antenna elements are made of 2-mm diameter
soft copper wire (# 12 AWG). Soldered parts must be protected
from the weather.
Antenna has weight 400
gram. Other characteristics
are as the previous design has. The antenna is tested at 1997
and at 2000 in the mountain Elbrus and
the antenna shows good result. I made QSOs in distance of 200-300
kms with 59 for both ends!