Radio Shack HTX-420 User Manual

BG TECH.
VERSION III
2001/2/28
A QUICK LOOK AT THE DISPLAY
1. : : it will appear when F (function) key is pressed.
2. TSQ
This is for the function of tone squelch (CTCSS).
“T” will appear when Tone Squelch (CTCSS) is enabled for transmitting.
“SQ” will appear when Tone Squelch (CTCSS) is enabled for receiving.
“TSQ” will appear when Tone Squelch (CTCSS) is enabled for transmitting and receiving.
3. +/- : “+” will appear to indicate a positive repeater offset. “ –“ will appear to indicate a negative repeater
offset.
4. TOT : “TOT” will appear when a time for the time out timer is selected.
5. AP : “AP” will appear when Auto Power Off is enabled.
6. Icon of umbrella : This icon will appear when Weather Radio is enabled. When it goes out of range, this
icon blinks.
F

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