Hy-Gain RRK-88 Bedienungsanleitung

308 Industrial Park Road

Starkville, MS 39759 USA Ph:

(662) 323-9538 FAX: (662) 323-6551

RRK-88

Roof Radial System

for DX 88 Vertical Antenna

INSTRUCTION MANUAL

General Information

This radial kit consists of four sets of resonant

radial wire assemblies totalling 14 radials for 7

bands, 40 through 10 meters. The DX-88

antenna will also work on the 80 meter band

using this radial kit. Each radial is made from

7/23 Copperweld®, and is attached to the

antenna base with solder lu

Installation

Second, install the support mast within the

tripod. The support mast should be 15/8 inch

O.D. by approximately 3 feet long (41mm x

)

steel or heav

-wall aluminum.

Install your OMNI DX-88 vertical antenna to

your support mast. Tune the antenna to the

desired frequencies before installation by

following the example or graphs in your DX-

88 manual. Attach a ground wire as shown in

Figure 1, Detail A, and tighten the two U-bolts

securel

The OMNI DX-88 vertical, when mounted on

a roof or mast, should be mounted in the clear

awa

from trees and

ower lines.

Do not install this antenna near any power line.

Not only is it dangerous to put up and take

down, the power lines could cause excessive

noise to be received by the radio connected to

this antenna.

Also, do not attach other antennas or antenna

supports to this antenna or to its resonant radial

stem.

Attach the insulators to each free end of the

radial wires. Fold back the free end of the

radial wire and lightly twist together. DO NOT

CUT OFF EXCESS WIRE UNTIL YOU ARE

SURE ALL BANDS ARE WORKING

PROPERLY. Adjust the wire lengths to those

shown in Table 1.

Cut the 5/32 inch polyethelyne rope into

lengths appropriate for your installation. The

supplied length of 100 feet will make 14

sections each 7 feet long. Insert these rope

sections through the insulators and tie.

WARNING

Installation of this product near power

lines is dangerous!! For your safety,

follow the installation directions.

Attach each of the 4 wire assemblies to the

bottom of the antenna base, using the No. 10

bolts installed on the base. Ti

hten securel

First, obtain a short sturdy tripod, such as a

Radio Shack® 3 foot tripod, and attach it to

your roof using 1/4 inch or 5/16 inch lag

screws (not supplied). The lag screws should

be screwed into the roof joist where possible,

or you should add a reinforcing board under

the roofin

wood for

reater stren

th.

Copperweld® is a registered trademark of Copperweld Bimetallic

Group

Radio Shack® is a registered trademark of the Tandy corporation

Table 1 Resonant Radial

Lengths

Figure 1 Roof Mounted

Radial System

-1

555

Figure 2 DX-88 Resonant

Radial System

Arrange the radials as shown in Figure 2.

Attach the hook screws to your roof and tie

each rope section to each hook loosely. Allow

extra rope at each location for fine-tuning of

each radial wire length. Waterproof the point

where each hook screw and lag screw enters

the roof with RTV.

The resonant radials must be at least 10 feet

from tower guy wires, mast guy wires or any

other wires or metal objects. Use the shortest

path possible between the antenna and an 8

foot ground rod for the earth ground, using #6

or #8 copper wire. Mast mounting is identical

to roof mounting.

WARNING

Keep this antenna away from the reach of

children or pets. When transmitting, the

antenna and antenna radials are hot with

RF proportional to the operating power.

If you mount your antenna on a roof and find

the roof space is to small for the radial system,

you can droop the radials over the edge of the

roof at almost any angle without seriously

changing the performance of the antenna. The

radial system must be insulated from the roof

and connected to a good ground for lightning

protection.

In any installation, use a good quality 50 ohm

coaxial transmission line such as Times RG-

213/u (solid), Belden 8214 (foam) or Belden

8237, 8267, or 9251 (solid).

Take extra care when soldering connectors to

foam dielectric coaxial cable. Weatherproof

all connectors which will be exposed to rain or

ice with Coax-Seal® or another similar

substance.

Attach the transmission line to the bottom of

the base assembly and tighten securely. Tape

the coax to the tripod for strain relief when

roof mounting.

Coax-Seal® is a registered trademark of Universal Electronics,

eration

Connect the other end of your transmission

line to a good quality SWR meter and then to

your transmitter. While using low power (less

than 200 watts output) check the VSWR across

each band from 3.5 to 29.7 MHz.

Radial wires for the 80 meter band may be

added if

ou have enou

h room.

Refer to the OMNI-DX-88 vertical antenna

instruction manual for information on tuning

and operating this antenna system.

If the frequency of lowest VSWR is within

approximately 300 KHz of where it should be,

(according to the tuning graphs), you may fine-

tune your antenna by adjusting the lengths of

the appropriate radial wires. Shorten the two

radial wires on each band to raise the resonant

frequency, or lengthen the two radial wires to

lower the resonant frequency. When each band

has been adjusted, tightly attach the rope

sections to the hook screws.

Parts List

Item

No. Part No. Description Qty

1 878571 Radial Assembly, 40/30/17 Meter

2 878572 Radial Assembl

, 20/15/12/10 Meter

3 691136 Ro

5/32" Pol

x 100

878573 Parts Pack, RRK-88

4 460318 Radial

5 547275 Screw

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