Radio Shack HTX-420 User Manual

BG TECH.
VERSION III
2001/2/28
CONTENTS
Introduction to Amateur Radio
Preparation
Using Internal Batteries
Using Rechargeable Battery Pack
Testing Internal Batteries
Using Non-Rechargeable Batteries
Using AC Power
Using Vehicle Battery Power
Connecting the Antenna
Attaching the Belt Clip
Attaching the Wrist Strap
Connecting a Microphone/Speaker
A Quick Look at the Display
Operation
Turning On/Off the Transceiver
Changing the Channel/Frequency Up/Down
Changing the Volume Up/Down
Changing the Bands
Using Monitor Button
Using universal type e key for Set mode
Repeater Operation
Memory Operation
Storing a Transmit/Receive Frequency (Memory Writing)
Recalling Memory (Memory Reader)
Checking Memory Location Settings
Clearing a Single Memory
Using the Calling Frequency Memory

Radio Shack HTX-420 Specifications

Frequency

2-Meter TX frequency range	144–148 MHz
2-Meter RX frequency range	137–174 MHz
70-cm TX frequency range	438–450 MHz
70-cm RX frequency range	420–512 MHz
Air Band frequency range	108.000-136.9875 MHz
Weather Band channels	CH1–CH7

Operating Environment

frequency stability	± 10 ppm
operating temperature range	14° to 140° F (–10° to 60° C)
operating voltage range	DC 5 V to 13.8 V

Receiver

circuit type	Dual Conversion, Superheterodyne
1st IF frequency	45 MHz
2nd IF frequency	450 kHz
sensitivity	0.2 µV For 12dB Sinad
distortion	5% Max
S/N ratio	34 dB Min.

Transmitter

power output at DC 7.2 V	3 W
power output at DC 13.8 V	4 W
distortion (nominal)	3%
deviation	± 5 kHz Max.
S/N ratio	32 dB
current drain at DC 7.2 V	1200 mA
current drain at DC 13.8 V	1500 mA

Weight and Dimensions

weight with rechargeable battery	11.46 oz (325g)
dimensions (HWD)	4[1]/2 × 2[2]/5 × 1[1]/5 (122 × 61 × 31 mm)
impedance	50 ohm