Butternut GRK Instructions

Instructions

Model GRK

NOTE: Please read all instructions thoroughly before proceeding

to installation and assembly. During assembly and installation

take extreme care to avoid contacting power lines with any part

of the antenna or other conductors.

INSTALLATION CONSIDERATIONS

Ideally the antenna should be installed 30 ft (9.1 m) from any structure as shown

in figure 2. In most cases this will not be practical and an alternative method such

as the one shown in figure 3 may be used.

WARNING: Do not install the antenna in any place where any

part of it can come into contact with power lines in the event

of structural failure, in the course of normal flexing after

installation or during installation.

WARNING: In no case should the antenna be installed in any

place where structural failure of any part of the antenna or its

supporting system can endanger persons or property.

CAUTION! A grounded antenna will be at D.C. ground

potential! To avoid the danger of shock connect all station

equipment to a good earth ground. It is also recommended

that all station equipment be disconnected from the power

mains before connecting the feed line to the antenna. Please

consult the A.R.R.L. Handbook or other reference manuals for

additional safety procedures when working with electrical

equipment.

Tube w/insulator (A) should be protected against corrosion if it is to be placed in

concrete, damp acidic or alkaline soil. Asphalt roofing compound, polyurethane

varnish or other sealant that protects against moisture may be used.

Concrete may be used in areas of high winds for greater strength, in which case

the post may be twisted slightly during setting for easy removal later.

831 North Central Avenue Wood Dale Illinois 60191-1219 Telephone 630.238.1183 Facsimile 630.238.1186 http://www.bencher.com

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VI00404Z 082699

Table of Contents

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Page 1 Instructions Model GRK NOTE: Please read all instructions thoroughly before proceeding to installation and assembly. During assembly and installation take extreme care to avoid contacting power lines with any part of the antenna or other conductors. INSTALLATION CONSIDERATIONS Ideally the antenna should be installed 30 ft (9.1 m) from any structure as shown in figure 2.
Page 2 ASSEMBLY 1. Plant tube w/insulator (A) (packaged with antenna) in a hole approximately 21 in (53.3 cm) deep so that the upper end of the fiberglass insulator is approximately 7 in (17.8 cm) above ground level. Pack earth tightly around tube w/insulator (A) so that it remains vertical.
Page 3 ASSEMBLY similar tool along the path of a radial. 7. Leaving a little slack at the base of the antenna, carefully press the radial into the slit. Make sure not to cut the radial. Radials may left on top of the ground however they should be buried for the sake of pedestrians and lawnmowers.
Page 4 Because most ground losses occurs within a 1/48 from the antenna, the GRK Ground Radial Kit provides a good ground plane for 160 thru 6 meter operation without using much real estate. If the ground is extremely lossy, as in the desert, additional longer radials may need to be added.