Roberts-radio U-75R Manuel d'utilisateur télécharger pdf

1997, 2000 Tandy Corporation.

RadioShack and RadioShack.com are trademarks used by Tandy Corporation.

OWNER’S MANUAL — Please read before using this equipment.

U-75R UHF Antenna

BEFORE YOU BEGIN

Before you begin installation, read this manual and the sepa-

rate Consumer Product Safety Commission information sheet.

For your safety and convenience, plan each step of the installa-

tion and purchase the necessary hardware in advance. The

hardware required and the order in which you perform the steps

depend on the mounting and connection method you choose.

Warning: When you install your antenna, use extreme caution.

If the antenna starts to fall, let it go! It could contact overhead

power lines. If the antenna touches the power line, contact with

the antenna, mast, cable, or guy wires can cause electrocution

and death. Call the power company to remove the antenna.

not attempt to remove it yourself.

ASSEMBLING THE ANTENNA

Assemble the entire antenna on the ground.

1. Use the supplied hardware to loosely attach the supplied

mast clamp assembly to the main boom, as shown.

Note: To access the mast clamp holes, move the antenna’s

elements out of the way as needed.

2. Press the supplied large end plugs into the main boom.

CONNECTING LEAD-IN CABLE

TO THE ANTENNA

We recommend RG-6 cable and, if you prepare your own ca-

ble, a quality F-connector. You can also use 300-ohm flat, twin-

lead cable. (RadioShack carries a variety of suitable cables and

connectors.)

Note: If you prepare your own coaxial cable, be sure to slide

the supplied matching transformer’s weather boot onto the ca-

ble before you attach the F-connector.

Using Coaxial Cable

If you plan to add this antenna to a VHF antenna’s mast, refer

to “Adding the UHF Antenna to a VHF Antenna Installation” on

Page 2 for instructions. This type of setup requires twin-lead

cable. See “Using Twin-Lead Cable” to connect the cable to

your antenna. If you are connecting this UHF antenna directly

to your TV, follow these steps to make this connection using

coaxial cable.

1. Thread a matching transformer’s spade terminals through

the antenna’s strain-relief tab. (Matching transformers are

available at your local RadioShack store.)

2. Slide the spade terminals around the antenna’s lead-in ter-

minals (on both sides of the boom), then secure them with

the supplied flat washers and large wing nuts.

3. Screw the cable’s F-connector onto the matching trans-

former.

4. Slip the weather boot over the connection. If you use a

rebuilt cable without a weather boot, cover the connection

with weather-resistant tape.

Using Twin-Lead Cable

To connect flat, twin-lead cable to your antenna:

1. Split one end of the twin-lead cable for a length of about 3

inches. Then strip about

inch of insulation from both

leads.

2. Thread the stripped leads through the antenna’s strain-

relief tab.

U-Bolt

Mast Clamp

Backup Plate

Main Boom

Lock Nuts

Lead-In

Terminals

Weather Boot

F-Connector

Matching

Transformer

Strain-Relief Tab

Flat Washers

Large

Wing Nuts

Spade

Terminals

Main

Boom

Lead-In Terminals

Strain-Relief Tab

Twin-Lead Cable

Flat Washers

Large

Wing Nuts

Main

Boom

15-2160.fm Page 1 Friday, April 28, 2000 5:47 PM

1 2 3 4

Résumé du contenu

Page 1 - U-75R UHF Antenna

Page 2 - ANTENNA INSTALLATION

23. Wrap each lead around one of the antenna’s lead-in termi-nals (on both sides of the boom). Be sure there is enoughslack between the strain-relief

Page 3 - CONNECTING TO YOUR TV/VCR

36. Wrap each lead of the twin-lead cable around one of theVHF antenna’s lead-in terminals (on both sides of theboom).7. Replace the spade terminals (

Page 4 - We Service What We Sell

15-216004/00Printed in the USARadioShackA Division of Tandy CorporationFort Worth, Texas 76102Make connections as described if you have:• Twin-lead an

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