A light amount of clear lacquer or an acrylic
spray may be used to coat the exterior surface of
the element assemblies if this antenna is to be
installed near a sea coast. Tighten all joints
securely before coating! Also, if installed near a
sea coast, the solder lugs on the pigtail wire
assemblies should not touch the aluminum tubing
or clamp directly. Each solder lug should be
between 2 stainless steel flatwashers. Tighten
these connections securely and competely coat
with Scotchkote or RTV.
NOTE: Only use alcohol-based RTV (non-cor-
rosive). The acid-based RTV (which releases
acetic acid and smells like vinegar) will corrode
metal.
If a UHF connector (PL-259) is used with the
BN-4000 balun, seal the connector with Coax-
Seal (TM) or black electrical tape for rain
protection. Type N connectors are designed to be
weatherresistant if tightened securely.
Select the boom-to-mast bracket and clamp parts.
Loosely assemble them on the boom ends as
shown in Figure 1.
Secure the boom ends and brackets together with
four (4) 1/4"-20 x 3/4" bolts, lockwashers and
nuts (70, 75, 76), and two (2) 5/16"-18 x 2 3/4"
bolts, lockwashers and nuts (80, 82, 83 ). Tighten
these six bolts securely. The casting-to-boom
bracket (7), may deform slightly when the four
1/4" bolts are tightened. This is normal.
Assemble the two cast aluminum brackets (1) on
your temporary mast at about 4 feet (1.2 m)
above ground. A seven foot length of 2" ABS or
PVC plastic drain pipe makes an inexpensive
temporary mast. Secure the two brackets together
using the two (2) 5/16"-18 x 3" bolts,
lockwashers and nuts (78, 82, 83). Tighten these
two bolts evenly until the brackets are snug.
Содержание LP-1009A
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Страница 15: ...Exposed Tubing Lengths LP 1009 Metric ...
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