Radio Shack U-75R owner manual Unfolding the ANTENNA’S Elements, Attaching to the Mast

15-2160.fm Page 2 Friday, April 28, 2000 5:47 PM

3.Wrap each lead around one of the antenna’s lead-in termi- nals (on both sides of the boom). Be sure there is enough slack between the strain-relief tab and the antenna termi- nals to prevent stress on the cable or the terminals.

4.Secure the leads with the supplied flat washers and large wing nuts.

UNFOLDING THE ANTENNA’S ELEMENTS

1.Hold the main boom’s longer elements near the pivot points and pull them away from the boom until they snap into the self-locking plastic support insulators.

Caution: To avoid damage to the elements, do not pull them near their outer ends. Once the elements are locked into position, do not attempt to unlock them. Doing so might break the self-locking tabs.

2.Hold each wing boom and turn its elements until they snap squarely into place (perpendicular to the boom).

3.Press the supplied small end plugs into the wing booms.

4.Bolt the triangular wing boom brackets onto the main boom using the supplied 11/2-inch screw and small wing nut, as shown.

Wing Boom	11/2-Inch
Brackets	Screw

Main Boom

Small Wing Nut

5.Insert the top and bottom wing booms into the wing boom brackets. Secure them with the four supplied 11/4-inch screws and small wing nuts, as shown.

Top Wing Boom

Wing Boom

Brackets

11/4-Inch

Screws

Small Wing Nuts

Bottom Wing Boom

ATTACHING TO THE MAST

We recommend that you enlist the help of another person be- fore you put up the mast or attach your antenna to it. How you set up your mast depends on your specific installation. Refer to the separate Consumer Product Safety Commission informa- tion sheet for recommended methods. If you plan to add this

antenna to a VHF antenna’s mast, refer to “Adding the UHF An- tenna to a VHF Antenna Installation” for instructions.

1.Slide the antenna’s mast clamp assembly over the end of the mast.

2.Tighten the mast clamp assembly’s lock nuts to hold the antenna in place. Do not overtighten the lock nuts.

3.Set up the mast, then rotate it so the antenna’s shorter ele- ments point toward the broadcast antennas of the stations you want to receive.

	Main Boom
Wing Boom Elements	Short Elements

Toward TV

Stations’

Antennas

Main Boom Long Element

Mast

ADDING THE UHF ANTENNA TO A VHF ANTENNA INSTALLATION

To connect your UHF antenna to a VHF antenna, follow these steps.

1.Loosen the lock nuts on the VHF antenna’s mast clamp assembly. Slide the VHF antenna down the mast about 70 inches, then tighten the lock nuts to hold the antenna in place. Do not overtighten the lock nuts.

2.Mount your UHF antenna at the top of the mast. (See “Attaching to the Mast.”)

3.Use only about 70 inches of twin-lead cable to connect your UHF antenna to the VHF antenna. Be sure the cable is long enough to reach from the lead-in terminals of one antenna to the lead-in terminals of the other. Connect the cable to your UHF antenna first. (Follow the steps in the section “Using Twin-Lead Cable” on Page 1.)

4.Split the other end of the twin-lead cable for a length of about 3 inches. Then strip about 1/2 inch of insulation from both leads.

5.Remove the VHF antenna’s large wing nuts and flat wash- ers from its lead-in terminals. (If you used coaxial cable to connect the VHF antenna to your TV, also remove the spade terminals from the lead-in terminals.)

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