Mini Mobile CB 40-Channel Mobile CB Radio W/ On-Mic Channel Selector
(210-1704)                 Installation               Faxback Doc. # 51497

Attaching the Microphone Holder

You can attach the microphone holder to either side of the transceiver or
to another location in your vehicle.

To attach the holder to either side of the transceiver, secure the holder
to the side using the supplied screws, washers, and lock washers.

To attach the holder to another location in the vehicle, such as the
dashboard, follow these steps.

1.  Using the holder as a template, mark the positions for the desired
    location.

2.  At each marked position, drill a hole slightly smaller than the
    supplied mounting screws.

    CAUTION:  Be careful not to drill into anything behind the mounting
              surface.

3.  Attach the holder at the mounting location using the supplied 3 mm
    machine screws, spring washers, plain washers, and nuts.

    Note:  If you cannot reach behind the mounting surface to attach the
           nuts on the machind screws, use the supplied 3 mm plain washers
           and self-tapping screws.

Mounting the Transceiver

The most common mounting location for this CB is under a vehicle's
dashboard.  However, if you plan to use the TRC-503 as a base station, you
can place it on a desk, shelf, or table (see "Using the Transceiver as a
Base Station", below.

If you are mounting the Cb in a vehicle, choose a location where:

  You can easily reach the CB.

  Wires and cables are clear of the vehicle's pedals or other moving
  parts.

  The CB is not directly in front of heating vents.

  All wires and cables can reach their connection points.

CAUTIONS:  if you use the CB in a vehicle, mount it securely to avoid
           damage to the CB or vehicle or injury to anyone in the vehicle
           during sudden starts or stops.

           Do not mount the CB where it could damage or interfere with the
           operation of any passive restraint safety device (an airbag or
           seat belt).

Follow these steps to mount the CB using the supplied hardware.

1.  Using the mounting bracket as a template, mark the positions for the
    screw holes on the mounting surface.

2.  In each marked location, drill a hole slightly smaller than the
    supplied mounting screws.

    CAUTION:  Be careful not to drill into objects behind the mounting
              surface.

3.  Mount the bracket to the mounting surface with the supplied 6 mm
    bolts, spring washers, plain washers, and nuts.

    Note:  If you cannot reach behind the mounting surface to attach the
           nuts on the bolts, use the supplied 6 mm bolts and plain
           washers to secure the bracket.

4.  Attach the CB to the mounting bracket using the supplied rubber
    washers and mounting knobs.

Connecting an Antenna

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

Note:  If you are using this CB as a base station, see "Using the
       Transceiver as a Base Station", below.

When you choose an antenna, keep in mind that, for 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 ANTENNA 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 through the engine compartment or other areas that
  produce extreme heat.

To take advantage of your radio's maximum range, adjust the antenna's
Standing Wave Ratio (SWR) using an SWR meter (not supplied).

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.

Connecting the Microphone

1.  Press the tab on the side of the supplied microphone's plug and insert
    the plug into the MIC 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.

To disconnect the microphone from the transceiver, press the tab on the
side of the plug.  Then pull out the plug.

CAUTION:  Never pull on the microphone cable.

Connecting an External Speaker

You can connect your transceiver to an external CB speaker, so you can
hear an incoming call when you are outside your vehicle.

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 RadioShack
Cat. No. 21-549.  The speaker cable must have a 1/8-inch (3.5-mm) plug.

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

Note:  When you connect an external speaker, the CB's internal speaker
       disconnects.

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.

Using the Transceiver as a Base Station

Although this transceiver is designed mainly for mobile use, you can also
use it as a base station with an AC power source.  For base station
installation, you need these items:

  a 13.8-volt DC power supply that can supply at least 1.5 amps (such as
  Cat. No. 22-504)

  CAUTION:  Most 13.8-volt DC power supplies plug into a standard AC
            outlet to produce DC power.  Before connecting your CB to a
            13.8-volt DC power supply, read and follow the instructions
            included with the power supply.

  base station antenna (such as Cat. No. 21-989)

  coaxial antenna cable and connector (available at your local RadioShack
  store)

WARNING:  Use extreme caution when you install or remove a base station CB
          antenna.  If the antenna starts to fall, let it go!  It could
          contact overhead power lines.  If the antenna touches a 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 do so yourself!

Follow these steps to install the CB as a base station

Mount the base station antenna as described in its owner's manual.

1.  Connect the antenna to the ANTENNA jack on the back of the CB.

2.  Connect the transceiver's black power wire to the negative (-)
    terminal on the DC power supply.

3.  Connect the transceiver's red wire (with the in-line fuse) to the
    positive (+) terminal on the DC power supply.

4.  Connect the DC power supply to a standard AC outlet.

CAUTION:  To prevent damage to the CB, be sure you connect both an antenna
          and the microphone before you use the CB.

(BZG 02/22/99)