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CHAPTER 1 SPECIFICATIONS

 

 

GENERAL

 

 

Model DX 

94HP 

Frequency Range 

28.315 ~ 28.755 MHz 

Emission AM/USB/LSB 
Frequency Control 

Phase-Lock-Loop (PLL) Synthesizer 

Frequency Stability 

0.001% 

Temperature Range 

-30

°

C to +50

°

Antenna Impedance 

50 Ohms 

Antenna Connectors 

Standard SO-239 type 

Input Voltage 

13.8V DC 

Size 

7 3/4" (W) x 2 7/8" (H) x 10 1/4" (D) 

Weight 

6 lb. 

 

 

TRANSMITTER 

 

AM: 5W~40W  

RF Power Output 

USB/LSB: 100W PEP 

Transmit Current 

AM: 14 Amps             SSB: 25 Amps 

Spurious Emission 

-50 dB 

Unwanted Sideband 

-50 dB 

Audio Distortion 

10% 

Frequency Response 

300 to 2500Hz 

Microphone Dynamic 
Clarifier Range 

Coarse: 

±

 6.0KHz, Fine: 

±

 1.0KHz 

RECEIVER 

 

Sensitivity for 10 dB (S+N)/N 

AM: < 0.5   

μ

V; USB/LSB: < 0.25 

μ

Squelch Sensitivity 

< 0.5 uV 

Selectivity -55 

dB 

Image Rejection 

-50 dB 

AGC Figure of Merit 

100 mV for 10dB Change in Audio Output 

Audio Power Output 

2.5W @ 10% Distortion 

Audio Response 

300 to 2500 Hz 

 

(SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE) 

 

 

3

 

CHAPTER 2 INSTALLATION

 

 

INSTALLING THE RADIO 

Choose a convenient location for operation that does not interfere with driver or 

passenger. This radio 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 grounding connection to the chassis of vehicle. Proceed as follows to 
install the radio. 

 

1.

 

Locate a convenient area in your vehicle for the installation of the radio. Hold the 
mounting bracket with the radio in the location where the radio is to be installed. 
Make sure nothing will interfere with either the radio or the mounting bolts. Mark 
and then drill holes for the mounting bracket. 

 
2.

 

Most radio antennas come equipped with a PL-259 plug. Connect this plug to the 
ANT. Jack in the rear of the radio. 

 
3.

 

Extending from the rear of the radio is a fused red and black wire for the DC 
connections to the vehicle’s electrical system. For best performance, it is 

strongly

 

recommended that red lead be connected directly to the positive terminal on the 
vehicle’s battery and the black lead be connected directly to the negative terminal 
on the battery.  (Note, not connecting both leads direct to the battery may cause 
performance problems)  

This radio is designed for vehicles with negative ground 

systems

.  

 

Connections should be made using appropriate “crimp on” lugs of a size large 
enough to make good contact with the bolt used to fasten to the battery and the 
chassis ground. It is a good safety idea to install a second 30 amp fuse that would 
provide protection in case the red wire was to “fray” or get pinched and short to the 
body of the vehicle, somewhere between the battery and the radio. 

 

High power radios such as this one require large DC current flow when in the TX 
mode. Poor power connections cause supply voltage drops that can substantially 
decrease the performance of your radio. A good DC connection is probably one of 
the most important things for getting the best transmitter performance and in some 
cases, least receiver noise. 

 
4.

 

Mount the microphone bracket near the radio in an easily accessible spot using the 
two screws provided. 

 

Summary of Contents for DX 94HP

Page 1: ...OF CONTENTS PAGE CHAPTER 1 Specifications 2 CHAPTER 2 Installation 3 Installing The Radio 3 Ignition Noise Interference 4 Antenna 4 External Speaker 4 Public Address 4 CHAPTER 3 Operation 5 Front Pane...

Page 2: ...n the location where the radio is to be installed Make sure nothing will interfere with either the radio or the mounting bolts Mark and then drill holes for the mounting bracket 2 Most radio antennas...

Page 3: ...impedance and be able to handle at least 4 watts When the external speaker is plugged in the internal speaker is disconnected PUBLIC ADDRESS To use the Public Address PA function first connect an ext...

Page 4: ...ed As a courtesy to others use the Roger Beep only when necessary When the switch is in the SWR position the meter indicates the Standing Wave Ratio SWR of your antenna There are no adjustments becaus...

Page 5: ...ly in a normal voice This transceiver comes complete with a low impedance dynamic microphone B PROCEDURE TO RECEIVE 1 Be sure that power source microphone and antenna are connected to the proper conne...

Page 6: ...eased whereas in the LSB mode the transmitter s output frequency is decreased The result in listening to the receiver is that when the MODE switch is in the proper position either USB or LSB a true re...

Page 7: ...be used is provided with pre cut leads they must be revised as follows 1 Cut leads so that they extend 7 16 beyond the plastic insulating jacket of the microphone cable 2 All leads should be cut to th...

Page 8: ...he connections to pin 1 and 3 are made first and then the connections to pins 2 and 4 Use a minimum amount of soldering and be careful to prevent excessive solder accumulation on pins which could caus...

Page 9: ...16 MEMO 17 MEMO...

Page 10: ...gest calling between 10 00 AM and 4 00 PM Pacific Time z Please include a note with a detailed description of the symptoms This is important because it will help the technician who works on your radio...

Page 11: ...20 Printed in Taiwan ATDX98010C...

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