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2

 

CHAPTER 1 SPECIFICATIONS

 

 

GENERAL

 

 

Model 

DX 98VHP 

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 7/8" (W) x 3 1/8" (H) x 10 3/4" (D) 

Weight 

10 lbs. 

 

 

TRANSMITTER 

 

AM: 10W~50W

 

 

RF Power Output 

USB/LSB: 200W PEP 

Current Drain

 

AM: 25 Amps                 SSB: 40 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   ìV; USB/LSB: < 0.25 ìV 

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 the 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. It is a good safety 
idea to install a second 50 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 98VHP

Page 1: ...z O FF SWR 1 1 5 3 2 S 1 0 5 3 9 7 SET 40 20 60 dB MAX 200 150 100 50 25 PO 0 PA B IG R IG S E R IE S DX 9 8 V HP F D O FF N B A N L 1 TABLE OF CONTENTS PAGE CHAPTER 1 Specifications 2 CHAPTER 2 Insta...

Page 2: ...th 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 r...

Page 3: ...e 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 external spe...

Page 4: ...ue Therefore it is ideal for switch and control recognition day or night 16 BAND SELECTOR This switch is used to select the band 7 17 PWR SWR RB SWITCH When in the RB position the radio transmits an a...

Page 5: ...th and speak clearly 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 t...

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: ...n of the symptoms This is important because it will help the technician who works on your radio to locate your problem Intermittent problems are easily overlooked so be sure to give as much detail as...

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