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Radio Shack HTX-420 User Manual

Radio Shack HTX-420
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BG TECH.
VERSION III
2001/2/28
PREPARATION
You can operate your transceiver from any of four power sources;
l Li-Ion batteries
l Alkaline batteries
l AC Power (using an optional AC adapter)
l Vehicle battery power (using an optional DC adapter)
USING INTERNAL BATTERIES
Using Rechargeable Batteries
You can power your transceiver using two lithium ion batteries supplied as a sealed pack.
The battery pack has a built-in circuit that lets you recharge Li-Ion batteries. To charge the batteries, connect
an supplied external AC to DC adapter to the battery packs CHG jack.
Caution) Please, clear the contact on the radio to the lithium ion battery pack with alcohol from time to time.
Testing Internal Batteries
To test the batteries, hold down PWR for about 1 second. The battery voltage briefly appears. The bars of
battery icon on LCD appears as a battery monitor indicator. There more bars in side the icon, the stronger the
batteries. When there are no bars in side of battery icon and flashes, recharge the battery or replace all the
batteries if Alkaline batteries are used as soon as possible.
Using Non-Rechargeable Batteries
You can power your transceiver using four alkaline batteries using alkaline battery.
USING AC POWER
You can power the transceiver using a 13.8V DC power supply with a size H Adapta-plug adapter. This is
available at your local RadioShack store.
USING VEHICLE BATTERY POWER

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Radio Shack HTX-420 Specifications

Frequency IconFrequency
2-Meter TX frequency range144–148 MHz
2-Meter RX frequency range137–174 MHz
70-cm TX frequency range438–450 MHz
70-cm RX frequency range420–512 MHz
Air Band frequency range108.000-136.9875 MHz
Weather Band channelsCH1–CH7
Operating Environment IconOperating Environment
frequency stability± 10 ppm
operating temperature range14° to 140° F (–10° to 60° C)
operating voltage rangeDC 5 V to 13.8 V
Receiver IconReceiver
circuit typeDual Conversion, Superheterodyne
1st IF frequency45 MHz
2nd IF frequency450 kHz
sensitivity0.2 µV For 12dB Sinad
distortion5% Max
S/N ratio34 dB Min.
Transmitter IconTransmitter
power output at DC 7.2 V3 W
power output at DC 13.8 V4 W
distortion (nominal)3%
deviation± 5 kHz Max.
S/N ratio32 dB
current drain at DC 7.2 V1200 mA
current drain at DC 13.8 V1500 mA
Weight and Dimensions IconWeight and Dimensions
weight with rechargeable battery11.46 oz (325g)
dimensions (HWD)4[1]/2 × 2[2]/5 × 1[1]/5 (122 × 61 × 31 mm)
impedance50 ohm

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