Frequency Ranges; Specifications - Cobra 18 WX ST II Operation Manual

Frequency Ranges

The COBRA 18 WX ST II transceiver represents one
of the most ad vanced AM two-way radios used as a
Class D station in the Citizens Radio Service . This unit
Accessories
features advanced Phase Lock Loop (PLL) circuitry pro-
viding complete cov er age of all 40 CB chan nels and all
10 weather channels as shown below .
CB
Channel In MHz
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
18
Channel Channel
Freq. CB Freq.
Weather
Channel In MHz
Freq.
Channel In MHz
26 .965 21 27 .215
26 .975 22 27 .225
1
26 .985 23 27 .255
2
27 .005 24 27 .235
3
27 .015 25 27 .245
4
5
27 .025 26 27 .265
6
27 .035 27 27 .275
7
27 .055 28 27 .285
8
27 .065 29 27 .295
9
27 .075 30 27 .305
27 .085 31 27 .315
27 .105 32 27 .325
27 .115 33 27 .335
27 .125 34 27 .345
27 .135 35 27 .355
27 .155 36 27 .365
27 .165 37 27 .375
27 .175 38 27 .385
27 .185 39 27 .395
27 .205 40 27 .405
GENERAL
CHANNELS . . . . . . . . . . . . . . . . . . . . . . . . .CB - 40 CH
FREQUENCY RANGE . . . . . . . . . . . . . . . .CB - 26 .965 TO 27 .405 MHZ
Weather
FREQUENCY TOLERANCE . . . . . . . . . . .0 .005 %
FREQUENCY CONTROL . . . . . . . . . . . . .PLL (PHASE LOCK LOOP) SYNTHESIZER
OPERATING TEMPERATURE
RANGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-30° C TO + 65° C
MICROPHONE . . . . . . . . . . . . . . . . . . . . . .PLUG-IN DYNAMIC
INPUT VOLTAGE . . . . . . . . . . . . . . . . . . . 13 .8VDC nom . (negative ground)
CURRENT DRAIN
162 . 5 50
162 . 4 00 SIZE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7/8" D X 6-3/4" W X 1-7/8" H
WEIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 .25 LBS .
162 . 4 75
ANTENNA CONNECTOR . . . . . . . . . . . UHF; SO-239
162 . 4 25
METER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . LED; INDICATES RELATIVE POWER
162 . 4 50
162 . 5 00
TRANSMITTER
162 . 5 25
POWER OUTPUT . . . . . . . . . . . . . . . . . . . 4 WATTS
161 . 6 50
MODULATION . . . . . . . . . . . . . . . . . . . . . AM (AMPLITUDE MODULATION)
161 . 7 75 FREQUENCY RESPONSE . . . . . . . . . . . 300 TO 3000 HZ
OUTPUT IMPEDANCE . . . . . . . . . . . . . . 50 OHMS, UNBALANCED
RECEIVER
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . . LESS THAN 1 ΜV FOR 10dB (S+N)
SELECTIVITY . . . . . . . . . . . . . . . . . . . . . . . 6 dB @ 7 KHZ, 60 DB @ 10KHZ
IMAGE REJECTION . . . . . . . . . . . . . . . . . 60 dB, TYPICAL
ADJACENT-CHANNEL REJECTION . . 50 dB, TYPICAL
ATOMATIC NOISE LIMITER . . . . . . . . . BUILT-IN
WEATHER
SENSITIVITY . . . . . . . . . . . . . . . . . . . . . . . LESS THAN 1 ΜV FOR 12 dB SINAD
IF-FREQUENCY . . . . . . . . . . . . . . . . . . . . DUAL CONVERSION
AUDIO OUTPUT . . . . . . . . . . . . . . . . . . . MAXIMUM 1 W AT 10% DISTORTION
FREQUENCY RESPONSE . . . . . . . . . . . 300 – 3000 HZ AT -6 dB

Specifications

Specifications
WEATHER – 10CH
WEATHER – 161 .650 TO 163 .275
TRANSMIT: AM FULL MOD ., 1 .4A (MAXIMUM)
RECEIVE: SQUELCHED, 0 .9 A;
FULL AUDIO OUTPUT, 1 .2A (NOMINAL)
OUTPUT AND RECEIVED SIGNAL STRENGTH
19