Radio Shack U-75R Owner's Manual

15-2160.fm Page 1 Friday, April 28, 2000 5:47 PM
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. Do
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.
U-Bolt
Main Boom
Backup Plate
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

Flat Washers
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
2. Slide the spade terminals around the antenna's lead-in ter-
Mast Clamp
3. Screw the cable's F-connector onto the matching trans-
4. Slip the weather boot over the connection. If you use a
Lock Nuts

Using Twin-Lead Cable

Lead-In Terminals
To connect flat, twin-lead cable to your antenna:
1. Split one end of the twin-lead cable for a length of about 3
2. Thread the stripped leads through the antenna's strain-
RadioShack and RadioShack.com are trademarks used by Tandy Corporation.
OWNER'S MANUAL — Please read before using this equipment.
Strain-Relief Tab
Lead-In
Terminals
Spade
Terminals
Large
Wing Nuts
the antenna's strain-relief tab. (Matching transformers are
available at your local RadioShack store.)
minals (on both sides of the boom), then secure them with
the supplied flat washers and large wing nuts.
former.
rebuilt cable without a weather boot, cover the connection
with weather-resistant tape.
Main
Boom
Flat Washers
inches. Then strip about 1 /
2
leads.
relief tab.
©
1997, 2000 Tandy Corporation.
All Rights Reserved.
Main
Boom
F-Connector
Weather Boot
Matching
Transformer
Twin-Lead Cable
Strain-Relief Tab
Large
Wing Nuts
inch of insulation from both