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HH
37 ST SpecificationsFrequency Ranges
2120
GENERAL
CHANNELS . . . . . . . . . . . . . . . . . . CB - 40 CH
FREQUENCY RANGE. . . . . . . . . . CB - 26.965 TO 27.405 MHZ
FREQUENCY TOLERANCE . . . . . 0.005 %
FREQUENCY CONTROL . . . . . . . PLL (PHASE LOCK LOOP) SYNTHESIZER
OPERATING TEMPERATURE
RANGE. . . . . . . . . . . . . . . . . . . . . . -30° C TO + 50° C
MICROPHONE. . . . . . . . . . . . . . . . ELECTRET,PUSH-TO-TALK
INPUT VOLTAGE . . . . . . . . . . . . . 13.0V DC,INTERNAL BATTERIES
13.8 VDC,EXTERNAL
ANTENNA CONNECTOR. . . . . . . TYPE BNC
TRANSMITTER
POWER OUTPUT . . . . . . . . . . . . . 3.5 W AT 12 VDC - HIGH,0.8 W IN LOW
4.0 W AT 13.8 VDC - HIGH,1.0 IN LOW
MODULATION . . . . . . . . . . . . . . . AM
FREQUENCY RESPONSE. . . . . . . 300 - 3000 HZ AT -6 DB
OUTPUT IMPEDANCE. . . . . . . . . 50 OHMS,UNBALANCED
RECEIVER
CB
SENSITIVITY. . . . . . . . . . . . . . . . . . LESS THAN 1 uV FOR 10 DB S/N
IF FREQUENCY. . . . . . . . . . . . . . . DUAL CONVERSION
1 ST - 10.690 MHZ,2ND - 455 KHZ
AUDIO OUTPUT. . . . . . . . . . . . . . 500 mW MAXIMUM AT 10 % DISTO RT I O N
FREQUENCY RESPONSE. . . . . . . 300 - 3000 HZ AT -6 DB
2ND IF IMAGE REJECTION. . . . . GREATER THAN 60 DB
ADJACENT CH.REJECTION. . . . 50 DB MIN.
AUTOMATIC NOISE LIMITER. . . BUILT- IN
FREQUENCY CONTROL . . . . . . . PLL (PHASE LOCK LOOP)
MAX.SIGNAL TO NOISE RATIO. 58 DB WITH ST ON
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45 DB WITH ST OFF
The COBRA HH37 ST transceiver represents one of
the most advanced AM two-way radios used as a
Class D station in the Citizens Radio Service.This
unit features advanced Phase Lock Loop (PLL)
circuitry providing complete coverage of all 40 CB
channels.
1 26.965 21 27.215
2 26.975 22 27.225
3 26.985 23 27.255
4 27.005 24 27.235
5 27.015 25 27.245
6 27.025 26 27.265
7 27.035 27 27.275
8 27.055 28 27.285
9 27.065 29 27.295
10 27.075 30 27.305
11 27.085 31 27.315
12 27.105 32 27.325
13 27.115 33 27.335
14 27.125 34 27.345
15 27.135 35 27.355
16 27.155 36 27.365
17 27.165 37 27.375
18 27.175 38 27.385
19 27.185 39 27.395
20 27.205 40 27.405
Channel Channel
CB Freq. CB Freq.
Channel In MHz Channel In MHz
37st manual layout.5 10/1/98 9:56 AM Page 26