160 through UHF
rotating tower
system
Rohn 65G
new
45G tower page
Lightning
Station Grounds and
grounding
Contesting and
Boatanchor Room
Antenna System and
my house station
This
is the 195-foot tall
rotating tower at
W8JI. The tower is
Rohn 55G.
The
guyline rings and
rotor were made by
K0XG.
View
from contesting barn
side.
Antenna placement in
pictures below:
The
main HF antennas
are:
M2
three element full
size 40M on 47 ft
boom.
Modified KLM 6
element 20 meter Big
Stick. Now has 5
elements wide spaced
56 foot boom with
hairpin match.
Modified KLM 6
element 15 meter Big
Stick. Now has 5
elements wide spaced
38 foot boom with
hairpin match.
Modified Telrex 40
Meter with 47 foot
boom. Duplicates the
M2 now in dimensions
for better stacking.
Homebrew 6 element
wide spaced with 36
foot boom. Hairpin
match.
Installing Large
Yagi Antennas
First
we had to remove all
the old antennas
from the existing
165 foot Rohn 55G
tower:
Justin and W8JI Tom
at top
We
then added 3
sections of tower, a
new guy ring, and a
new layer of guy
lines. The first
antenna up was a
full size 40 meter
Yagi. This is a
homemade cradle that
rides up on a
temporary steel tram
line. It holds the
antennas flat and
stable while being
pulled into
position:
Tom and Justin
rigging the antenna
to the trolley.
Then
we pull the antenna
up:
Coming into place at
the top:
Bolted in place
after hanging from
boom strut cable:
Trolley is lower
back down tram line:
Later
in the morning the
upper 40M Yagi is in
position:
The
completed antenna
system:
See W8JI contest
station
since Sept 20, 2007
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