HTX-10 10-Meter Transceiver
(190-1110)                 Preparation                Faxback Doc. # 56898

Attaching The Microphone Holder

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

Use the supplied screws and lock washers to secure the holder to the side 
of the transceiver. 

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

1. Using the holder as a template, mark the positions for the mounting 
   screw holes at 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 machine
   screws and lock washers. 

Mounting the Transceiver

The most common mounting location for this transceiver is under a 
vehicle's dashboard.  If you use the HTX-10 as a base station, however, 
you can place it on a desk, shelf, or table (see "Using the Transceiver as 
a Base Station" below).

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

  You can easily reach the transceiver.
 
  Wires and cables are clear of the vehicle's pedals or other moving Parts

  The transceiver is not directly in front of heating vents. 

  All wires and cables can reach their connection points. 

WARNING:  If you use the transceiver in a vehicle, mount it securely to
          avoid damage to the transceiver or vehicle, and to avoid injury
          to anyone in the vehicle during sudden starts or stops.

Follow these steps to mount the transceiver 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.  Using a Phillips screwdriver, attach the mounting bracket to the 
    mounting surface with the supplied mounting screws and flat washers.

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

Connecting an Antenna

There are many different types of transceiver antennas for mobile
transceivers.  Each antenna 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 transceiver as a base station, see "Using the
       Transceiver as a Base Station:" below.

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 chose 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, adjust the antenna's Standing Wave 
Ratio (SWR).  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.

CAUTION:  You might damage your transceiver if you use it at a high SWR 
          value. 

Connecting The Microphone

1.  Align the slot on the bottom of the microphone's plug with the ridge 
    inside the MIC jack.  Then fully insert the plug into the jack.

2.  Turn the plug's locking nut clockwise to tighten it.

3. Slide the microphone onto the microphone holder. 

To disconnect the microphone, unscrew the locking nut and gently pull out 
the microphone plug.  Never pull on the microphone cable to disconnect the 
microphone. 

Connecting An Optional External Speaker

You can connect an external speaker to the transceiver.  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.  The speaker's cable must 
have a 1/8-inch (3.5-mm) plug.  Both accessories are available at your 
local RadioShack store. 

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

Note:  Connecting an external speaker disconnects the transceiver's
       internal speaker. 

Using Vehicle Battery Power

Follow these steps to connect the transceiver to your vehicle's battery 
power. 

1.  Connect the red wire (with inline fuse holder) from 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. 

3.  Connect the single connector end of the power cord to the connector on
    the back of the transceiver. 

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 12-volt DC power supply that can supply at least 7 amps. 

  CAUTION:  Most 12-volt DC power supplies plug into a standard AC outlet 
		to produce DC power.  Before connecting your transceiver to a 
            12-volt DC power supply, read and follow the instructions 
            included with the power supply. 

  Base station antenna.

  Coaxial antenna cable and connectors.

  External 8-Ohm speaker.

  Note:  Your local RadioShack store carries everything you need to use 
         the transceiver as a base station.

Follow these steps to install the transceiver as a base station. 

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

    WARNING: Use extreme caution when you install or remove a base station
             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.
  
2.  Connect the antenna to the ANT jack on the back of the transceiver. 

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

4.  Connect the transceivers' red wire (with in-line fuse holders) to the
    positive (+) terminal on the DC power supply. 

5.  Connect the single-connector end of the power cord to the connector on 
    the back of the transceiver. 

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

(BR-EB 9/29/99)