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OPERATING INSTRUCTIONS FOR YOUR
How To Use Your
40-CHANNEL,
40 CHANNEL CITIZENS BAND
SSB/AM 2-WAY MOBILE RADIO
CITIZENS BAND Model 148 GTL
SSB/AM 2-WAY Contents Page
MOBILE RADIO The CB Story ....................................................................................1
Section I: Introduction......................................................................2
Section II: Specifications ..............................................................3, 4
Section III: Installation ........................................................5, 6, 7, 8
Model 148 GTL Section IV: Operation................................................................9 - 17
Controls and Indicators ....................................................................9
A.Control Functions ..............................................................9, 10, 11
B.Indicator Functions ......................................................................12
Operating Procedure to Receive......................................................12
Operating Procedure to Transmit ....................................................13
Receiving SSB Signals ..............................................................13, 14
Alternate Microphones and Installation ..............................15, 16, 17
Section V: Maintenance and Adjustment ..................................18 -21
FCC Warning ..................................................................................18
Section VI: Appendix ..........................................................19, 20, 21
Ten Code ........................................................................................19
A few Rules That Should Be Obeyed ..............................................20
How Your CB Can Serve You ..........................................................20
Use Channel 9 for Emergency Messages Only ................................21
Warranty Service Instructions ..........................................................22
Limited Two Year Warranty ..............................................................23
Cobra CB Radio Accessories ..................................Inside Back Cover
The CB Story Section I Introduction
The Citizens Band lies between the shortwave broadcast and 10-meter Amateur FREQUENCY RANGE
radio bands, and was established by law in 1949. The Class D two-way communi- The COBRA 148GTL transceiver represents one of the most advanced SSB/AM two-
cations service was opened in 1959. (CB also includes a Class A citizens band and way radios ever designed for use as a Class D station in the Citizens Radio Service.
Class C remote control frequencies.) This unit features advanced Phase Lock Loop (PLL) circuitry, which is used in the AM
FCC regulations permit only "transmissions" (one party to another) rather than mode and in the upper and lower single sideband modes, providing complete cover
"broadcasts" (to a wide audience). Thus, advertising is not allowed on CB Channels age of all 40 channels shown below.
because that is "broadcasting."
Channel Channel Frequency Channel Channel Frequency
in MHz in MHz
1 26.965 21 27.215
2 26.975 22 27.225
NOTICE: 3 26.985 23 27.255
Replacement or substitution of transistors, regular diodes or 4 27.005 24 27.235
other parts of a unique nature, with parts other than those 5 27.015 25 27.245
recommended by Cobra, may cause violation of the techni- 6 27.025 26 27.265
cal regulations of Part 95 of the FCC Rules, or violation of 7 27.035 27 27.275
Type Acceptance requirements of Part 2 of the Rules. 8 27.005 28 27.285
Citizens Band (CB) Radio operators are no longer required to 9 27.065 29 27.295
obtain an FCC license to operate their CB equipment or 10 27.075 30 27.305
provide station identification.
11 27.085 31 27.315
An operator of a CB radio station is required to comply
12 27.105 32 27.325
with the communications act and with the rules of CB
13 27.115 33 27.335
Radio Operation.
14 27.125 34 27.345
15 27.135 35 27.355
16 27.155 36 27.365
Serial No. 17 27.165 37 27.375
18 27.175 38 27.385
Date of Purchase 19 27.185 39 27.395
Dealer Name 20 27.205 40 27.405
Keep this manual for detailed information about your Cobra CB radio.
The COBRA 148GTL has a vastly superior receiver which includes an RF gain con-
SAVE YOUR SALES RECEIPT, THE CARTON AND "PACKING"
trol and noise blanker circuitry effective in both AM and SSB modes., and an auto-
MATERIALS FOR POSSIBLE FUTURE USE.
matic noise limiter effective in the AM mode. The receiver also features increased
protection against cross modulation and strong adjacent channel signals.
To obtain maximum performance please read carefully the descriptions and oper-
ating instructions in this manual.
1 2
Section II Specifications Section II Specifications (Cont.)
GENERAL
RECEIVER
Channels 40 AM, 40LSB, 40 USB.
Frequency Range 26.965 to 27.405 MHz. Sensitivity SSB: 0.25