Galaxy DX-55HP Owner's Manual

OWNER’S MANUAL

SIGNAL

9

20

7

5

40

3

1

0

16

12

8

4

20

0

POWER

DX 55HP

10-Meter AM/FM Mobile Transceiver

Built in Frequency Counter with Roger Beep

DX-55HP

60

MAX

F.DISPLAY

OFFFM

NBAM

OFFPA

VOL SQ CLARIFIERMIC RF

OFF

R.B.

OFF

+10KHz

OFF

OFF

DIM PWR

C D

E

B

A

F

BAND

Printed In Malaysia

A412308BTA

TABLE OF CONTENTS

Page

Specification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Installation

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Mounting the Radio . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Ignition Noise Interference . . . . . . . . . . . . . . . . . . . . . 5

Antenna . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Tuning the Antenna for Optimum SWR . . . . . . . . . . . 6

External Speaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Operation

Control Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

A. Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

B. Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Press-To-Talk Microphone . . . . . . . . . . . . . . . . . . . . . 12

Operating Procedure to Receive . . . . . . . . . . . . . . . . . 12

Operating Procedure to Transmit . . . . . . . . . . . . . . . . 12

Alternate Microphones and Installation . . . . . . . . . . . 13

Specifications

GENERAL

Channels 40 CH
Frequency Range 28.065 to 28.505 MHz
Frequency Control Phase Lock Loop (PLL) synthesizer.
Frequency Tolerance 0.005%
Frequency Stability 0.001%
Operating Temperature
Range
Microphone Plug-in dynamic; with push-to-talk switch

Input Voltage 13.8V DC nominal, 15.9V max, 11.7V min.

Size 2-3/8” (H) x 7-7/8” (W) x 9-1/4” (D).
Weight 5 bs.
Antenna Connector UHF, SO239
Meter (2-in-1) Illuminated; indicates relative output power

TRANSMITTER

Power output AM/FM, HIGH 10 watts, LOW 2 watts
Modulation High-and low-level Class B, Amplitude

Spurious Emissions 60 dB
Frequency Response AM and FM: 450 to 2500 Hz.
Output Impedance 50 ohms, unbalanced
Output Indicators Meter shows relative RF output power.

-30 °C to +50 °C.

and coiled cord.

(Positive or negative ground).

Transmit: AM full mod., 4.5A.
Receiver: Squelched, 0.3A.

Maximum Audio output, 0.7A.

and received signal strength.

Modulation: AM. Variable capacitance
Frequency Modulation: FM.

Transmit LED glows red when transmitter is
in operation.

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RECEIVER

IF

Sensitivity

Selectivity AM/FM: 6 dB @ 3 KHz, 50 dB @ 9 KHz.
Image Rejection More than 65 dB.
IF Frequency AM/FM: 10.695 MHz 1st IF, 455 KHz 2
Adjacent-Channel
Rejection
RF Gain Control 45 dB adjustable for optimum signal

Automatic Gain
Control (AGC)
Squelch
ANL Switchable
Noise Blanker RF type
Audio Output Power 4 watts into 8 ohms.
Frequency Response 300 to 2800 Hz.
Built-in Speaker 8 ohms, round.
External Speaker (Not
Supplied)

AM: 1.0 µV for 10 dB (S+N)/N at greater
than ½ -watt of audio output.
FM: 1.0 µV for 20 dB (S+N)/N at greater
than ½-watt of audio output.

60 dB AM

reception.
Less than 10 dB change in audio output for
inputs from 10 to 100,000 microvolts.
Adjustable; threshold less than 0.5 µV.

8 ohms; disables internal speaker when
connected.

Installation

LOCATION

Plan the location of the transceiver and microphone bracket before
starting the installation. Select a location that is convenient for operation and

nd

does not interfere with the driver or passengers in the vehicles. In
automobiles, the transceiver is usually mounted below the dash panel, with
the microphone bracket beside it.

MOUNTING THE RADIO

Your transceiver is supplied with a universal mounting bracket. When
mounting the bracket and radio to your car, make sure it is mechanically
strong. Also provide a good electrical connection to the chassis of the
vehicle. Proceed as follows to mount the transceiver:

1. After you have determined the most convenient location in your vehicle,

hold the transceiver with mounting bracket in the exact location desired.
If nothin g will interfere with mounting it in the desired position, remove
the mounting bolts. Before drilling the holes, make sure nothing will
interfere with the installation of the mounting bolts.

2. Connect the antenna cable plug to the standard receptacle on the rear

panel. Most antennas are terminated with a type PL-259 plug and mate
with the receptacle.

3. Connect the red DC power input wire (with the fuse) to +13.8V DC.

This wire extends from the rear panel. In automobile installation,
+13.8V DC is usually obtained from the accessory contact on the
ignition switch. This prevents the set being left on accidentally when the
driver leaves the car and also permits operating the unit without the
engine running. Locate the accessory contact on most ignition switches
by tracing the power wire from the AM broadcast receiver in the car.

4. Connect the black lead to ground. This is usually the chassis of the car.

Any convenient location with good electrical contact (remove paint) may
be used.

5. Mount the microphone bracket on the right side of the transceiver or

near the transceiver, using two screws supplied. When mounting in an
automobile, place the bracket under the dash so the microphone is
readily accessible.

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