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Materials
for the Lev Antenna
Century Extension Spring (This
is the Antenna)
C-253 $4.97 usd 9/16" x 16-1/2" x .054"
(14.3 mm x 419.1 mm x 1.372 mm) Bar Code 3859? 00253
My Lowes still had this as of July 2008 for $4.97
The actual length of the spring coils is 15.75" (40 cm)
at 16 turns per inch (approx. 252 turns at a ½" diameter)
Try
Home
Depot
on the nut & bolt isle near the metal rods - I found
my spring in Lowes
near the nylon bolts.
5' PVC pipe 1/2 x 5' 98 cents -
Use the full length of the PVC until your ready to mount it. This way you can stand it on the
floor while experimenting. Use an alligator clip connected to the
brass screw on the Lev Antenna that
holds the spring in place.
I would
also recommend 5' PVC pipe 1/2 x 5' High
Pressure PVC
which can be found in the plumbing section of a hardware
store. This has a slightly larger inside diameter and will
fit snugly over the coupling nuts like those used on the
EtherWave Standard elbow.
Use a 1/2"
(ideal) on the spring in the PVC pipe as seen in the picture to the left next to the brass screws. This gives you about 15 turns per inch. To
much stretch the outside low octaves could become
"narrower" than the inside high note octaves.
Hold your un-stretched spring next to the PVC pipe to get
your screw markings.
You need two 1" brass screws and nuts to hold the spring stretched in the PVC
pipe, or
use two 2" brass screws and have your spring
mounted on the outside of the PVC.
"With
Lev tuning it is possible that before tuning, the octave next to the antenna will
be
wider
than the outside low octave, this is one of the interesting antenna phenomenon's."
Ace Hardware Outlet
CENTURY SPRING
C-253
CENTURY SPRING EXTENSION SPRING 9/16 OD 16-1/2 Length .054 Wire diameter
25.2 Maximum deflection 61.7 LBS maximum safe load Steel Open wound helical
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