TRC-485  40-Channel AM/SSB CB Transceiver
(210-1577)                 Connections                Faxback Doc. # 33137

CONNECTING AN ANTENNA

There are many different types of CB antennas for mobile CBs.  Each antenna
type has its own benefits, so choose the one that best meets your needs.
Your local Radio Shack store sells a wide variety of antennas.

NOTES:  If you are using this CB as a base station, see "Using the
        Transceiver as a Base Station", on Faxback Doc. # 33138.

When you choose an antenna, keep in mind that for the best performance you
should mount the antenna:

  As high as possible on the vehicle.

  As far as possible from sources of electrical noise.

  Vertically.

Once you choose an antenna, follow its mounting instructions.  Then route
the cable to the transceiver and connect the cable to the ANT jack on the
back of the transceiver.

CAUTIONS:  Avoid routing the cable next to sharp edges or moving parts,
           which might damage the cable.

           Do not run the cable next to power cables or other radio antenna
           cables.

           Do not run the cable through the engine compartment or other
           areas that produce extreme heat.

To achieve your radio's maximum range, the antenna's Standing Wave Ratio
(SWR) must be adjusted.  You can use an SWR meter (not supplied) to adjust
the SWR for your antenna.

Follow the instructions supplied with the SWR meter and antenna to adjust
your antenna's SWR to the lowest possible value.  SWR values of 2.0:1 are
generally acceptable, with readings of 1.5:1 or lower being more desirable.

NOTE:  Using your radio with an antenna adjusted to a high SWR value might
       eventually damage your radio.

CONNECTING THE MICROPHONE

1.  Press the tab on the side of the supplied microphone's plug and insert
    the plug into the microphone jack on the front of the transceiver.  Be
    sure the tab is aligned with the jack's notch.

2.  Slide the microphone onto the microphone holder.

    CAUTION:  To disconnect the microphone from the transceiver, press the
              tab on the side of the plug.  Then pull out the plug.  Never
              pull on the microphone cable.

CONNECTING OPTIONAL SPEAKERS

You can connect your transceiver to an external CB speaker and/or a PA
(public address) speaker.

NOTE:  When you connect an external and/or a PA speaker, the CB's internal
       speaker disconnects.

Using an External CB Speaker

The external speaker you use with the transceiver should have an impedance
of 8 Ohms and be able to handle 3 to 10 watts of power, such as Radio Shack
Cat. No. 21-549.  The speaker cable must have a 1/8-inch plug.

To connect the external speaker to the transceiver, insert the speaker
cable's plug into the EXT jack on the back of the CB.

Connecting a PA Speaker

The PA speaker should have an impedance of 8 Ohms and be able to handle at
least 2.5 watts of power, such as Cat. No. 40-1227.  The speaker cable must
have a 1/8-inch plug.

To connect the PA speaker to the transceiver, insert the speaker cable's
plug into the PA jack on the back of the CB.

NOTE:  The speaker should be at least 6 feet from the CB.

USING VEHICLE BATTERY POWER

Follow these steps to connect the transceiver to vehicle battery power.

1.  Connect the red wire (with the in-line fuse holder) on the back of the
    transceiver to a point in your vehicle's fuse block that has power only
    when the ignition is in the ACC (accessory) or ON position.

2.  Connect the black wire to a metal part of the vehicle's frame (chassis
    ground).

    CAUTION:  Do not connect the black wire to a non-metallic (plastic)
              part, or to any part insulated from the vehicle's chassis by
              a non-metallic part.


(LB/EB 5/16/96)