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HH
37 ST Specifications
Frequency Ranges
21
20
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