U-120R UHF Antenna  (150-2162)     Installation        Faxback Doc. # 7604

The U-120R UHF Antenna is specially designed to provide improved
performance compared to similar-sized antennas.

ASSEMBLING THE ANTENNA

We recommend you assemble the entire antenna on the ground, them mount the
assembled antenna on the mast.  Follow these steps to assemble the
antenna.

1.  Fold out the elements on the main boom by holding them near the boom
    and pulling them until they snap into place.

Caution:  Do not pull out the elements by their ends.  If you do, you
          could damage an element.

          Fold out the elements on the smaller, separate wing booms until
          they snap into place.

3.  Bolt the triangular wing boom brackets onto the main boom.

4.  Insert the top and bottom wing booms in the triangular bracket and
    secure them with the four 1 1/4-inch screws and small wing nuts.

5.  Use the supplied  hardware to loosely attach the supplied mast clamp
    assembly to the main boom.

6.  Use the supplied hardware to attach the other mast clamp assembly to
    the cradle boom.  Then attach the H-blocks to the antennas main boom.

7.  Press the supplied end plugs into the ends of the cradle boom and each
    antenna boom.  Then snap the cradle boom onto the main boom's 
    H-blocks, with the mast clamp assemblies aligned and the blue plastic
    pieces on the main boom facing up.

CONNECTING LEAD-IN CABLE TO THE ANTENNA

Follow these steps to connect lead-in cable to the antenna.  We recommend
RG-6 cable and, if you prepare your own cable, a quality CF-56F-connector
(both available at your local Radio Shack store).  You can also use
300-ohm flat, twin-lead cable.

Note:  If you prepare your own coaxial cable, slide a matching
       transformer's weather boot over the end of the cable before you
       attach the F-connector.

Follow these steps if you use coaxial cable.

1.  Thread the ends of a matching transformer through the antenna's
    strain-relief tab.  Then use the supplied washers and wing nuts to
    secure the transformer's lead to the antenna's lead-in terminals.

2.  Screw the cable's F connector onto the matching transformer.  If you
    use a prebuilt cable without a weather boot, cover the connection with
    weatherproof tape.  Otherwise, slip the boot over the connection.

Notes:  Use plastic tape to secure the cable to the mast at about 3 foot
        intervals.

        Use coaxial nail clips every few feet to secure the cable to
        walls.

        Use a 75-ohm grounding block to ground the cable where the cable
        enters the house.

        Use a wall-through tube to neatly route the cable through the
        walls.

Follow these steps if you use twin-lead cable.

1.  Split the cable for a length of about 3 inches.  Then remove about 1/2
    inch of insulation from the ends of the twin-lead cable.

2.  Thread the ends of the twin-lead cable through the antenna's strain-
    relief tab.  Then use the supplied washers and wing nuts to secure the
    twin-leads to the antenna's leads to the antenna's lead-in terminals.

Notes:  Allow enough slack between the strain-relief tab and the antenna
        terminals to prevent stress on the cable or terminals.

        Be sure the cable remains at least 4 inches away from all metal
        surfaces.

        Use standoff insulators about every 4 feet.

        Twist the cable about three turns between each standoff.

        Use a 300-ohm static discharge unit to ground the twin-lead cable
        at the point where the wire enters the house.

ATTACHING TO THE MAST

Slide the antenna's mast clamp assembly over the end of the mast with the
cradle boom on top.  Then tighten the mast clamp assembly's nuts to hold
the antenna in place.  Take care not to overtighten the nuts.

ADDING A UHF ANTENNA TO A VHF ANTENNA

1.  Connect the UHF antenna to a VHF antenna by cutting the twin lead
    cable of the VHF antenna at least 70 inches (1.88m) down (long enough
    to reach the UHF antenna).

2.  Split the VHF twin-lead cable for a length of about 3 inches.  Then
    remove about 1/2 inch of the insulation from the end of the VHF twin-
    lead cable.  Attach to the UHF antenna's lead-in terminals facing
    down.

3.  In some locations you might need to use a VHF combiner such as Radio
    Shack Cat. No. 15-1137 to receive a satisfactory picture.

SETTING UP THE MAST

How you set up the mast depends on your specific installation.  After you
set up the mast, rotate it so the antenna's shorter elements point toward
the broadcast antennas of the stations you want to receive.

CONNECTING TO THE TV/VCR

Connect the antenna's lead-in cable to the TV receiver's antenna terminals
according to the type of cable you used.  A few methods are as follows:

If you have

Coaxial antenna lead-in
Twin-lead UHF terminals
Coaxial VHF terminal
We recommend you use Radio Shack Cat. No. 15-1140, Indoor/Outdoor
Matching Transformer.

If you have:

Coaxial antenna lead-in
Twin-lead UHF terminals
Twin-lead VHF terminals
We recommend you use Radio Shack Cat. No. 15-1139, Transformer/Splitter.

If you have:

Coaxial antenna lead-in
Combined coaxial VHF/UHF terminal, plug it in.

If you have:

Twin-lead antenna lead-in
Twin-lead UHF terminals
Coaxial VHF terminal

We recommend you use Radio Shack Cat. No. 15-1251, Splitter.

(br/all-9/19/94)