Spiderbeam 160m Vertical Model 160-18-4WTH
12
160-18-4WTH Manual, Ver. 1.7 17-JULY-2021
2.6
Measuring and Cutting Ropes and Wires
Measurements that need to be exact should be measured with a long tape measure, rather
than with a folding ruler. By measuring once or twice with a long tape measure, rather than
multiple times with the folding ruler, you reduce the possibility of error.
The
cut length
of the vertical radiator wire is not critical down to the last millimeter, because it
is intentionally cut too long and will be shortened later during the tuning process.
The
cut length
of the top-hat wires is not critical down to the last millimeter, because they may
also be adjusted in the field when tuning. This will depend on the ground characteristics of your
location.
The final field adjustment of the top-hat wires is critical. Even though you may have to adjust
their lengths a few times, you must keep the length of all top-hat wires equal.
FORMULA FOR SUCCESS: MEASURE TWICE, CUT ONCE.
2.6.1 Table of Measurements
MEASUREMENTS
MATERIAL
QTY
LENGTH
CUT
STAKE DISTANCE
FROM THE POLE
Radiator Vertical Wire
CQ-532
1
~17.5m
18m
N/A
Top-Hat Wires
DXW-UL
4
~12.5m
15m
N/A
T-H Extension Rope
PVDF Monofil
4
~18m
20m
25m
Upper Guy Rope
2mm Kevlar
4
~14-15m
17m
7-9m
Lower Guy Rope
2mm Kevlar
4
~10-12m
14m
7-9m
Total CQ-532
~
~
~
18m
~
Total DXW-UL
~
~
~
60m
~
Total PVDF Monofil Line
~
~
~
80m
~
Total Rope with 4 dir. Guys
~
~
~
124m
~
Note: The top-hat wires are tied to different ground stakes than the guy ropes.
