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Cobra Electronics 25 LTD ST manual

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Table of contents for the manual

  • Page 1

    OPERA TING INSTRUCTIONS FOR YOUR 40 CHANNEL CITIZENS BAND 2-W A Y MOBILE RADIO Model 25 L TD ST Cobr a Electr onics Corpor ation 6500 W . Cortland Street Chicago, IL 60707 PRINTED IN HONG KONG ©COBRA ELECTRONICS CORP . 1997 480-205-P-001[...]

  • Page 2

    The Citizens Band lies between the shortwave br oadcast and 10-meter Amateur radio bands, and was established by law in 1949. The Class D two-way commu- nications service was opened in 1959. (CB also includes a Class A citizens band and Class C remote contr ol fr equencies.) FCC regulations permit only ÒtransmissionsÓ (one party to another) rathe[...]

  • Page 3

    Specifications (cont.) GENERAL Channels 40 Frequency Range 26.965 to 27.405 MHz. Fr equency Contr ol Phase Lock Loop (PLL) synthesizer . Frequency T olerance 0.005%. Operating T emperature Range -30¡ C to + 50¡ C. Microphone Plug-in dynamic. Input V oltage 13.8VDC nom.(positive or negative ground). Current Drain T ransmit : AM full mod., 1.5A (ma[...]

  • Page 4

    5 Installation (Cont.) 3. Connect the antenna cable plug to the standard r eceptacle on the unit. Most CB antennas are terminated with a type PL-259 plug which mates with the r eceptacle marked "ANT ." 4. Connect the red lead of DC power cor d to +13.8 VDC. In automobile instal- lations, +13.8 VDC is usually obtained from the accessory co[...]

  • Page 5

    7 Installation (Cont.) Ignition Noise Interference Use of a mobile receiver at low signal levels is normally limited by the pr esence of electrical noise. The primary source of noise in automobile installations is fr om the alternator and ignition system in the vehicle. Under most operating conditions, when signal level is adequate, the background [...]

  • Page 6

    Operation (Cont.) 9 5. RF GAIN. Adjust as required to optimize signal. This contr ol is used primarily to optimize reception in str ong signal areas. Gain is reduced by counter clockwise r otation of the contr ol. 6 . CHANNEL SELECTOR SWITCH. This switch selects any one of forty Citizens Band channels desired. The selected channel is indicated by t[...]

  • Page 7

    1 1 3. ANTENNA CONNECTOR: This SO-239 connector permits connection of the transmission line cable PL-259 connector to the transceiver . 4. POWER. This jack permits connection of the DC power to the transceiver . A power cord with polarized plug is supplied with the radio. The polar - ized plug ensures that the power will always be connected pr oper[...]

  • Page 8

    13 12 Operation (Cont.) Operating Procedure to T ransmit 1. Be sure the operator has r ead and understands part 95, F .C.C. Rules and Regulations prior to operating the transmitter . 2. Select the desired channel. 3. Set the DYNAMIKE control fully clockwise. 4. The receiver and transmitter ar e controlled by the press-to-talk switch on the micr oph[...]

  • Page 9

    14 15 The COBRA CB transceiver is specifically designed for the environment encoun- ter ed in mobile installations. The use of all solid state cir cuitry and its light weight r esult in high r eliability . Should a failure occur , however , review the following, then if necessary , r eplace parts only with identical parts. Do not substitute. Refer [...]

  • Page 10

    Appendix (Cont.) A Few Rules That Should Be Obeyed 1 . Y ou a r e not allowed to carry on a conversation with another station for mo r e than five minutes at a time without taking a one-minute b r eak to give others a chance to use the channel. 2 . Y ou a r e not allowed to blast others o f f the air by overpowering them with illegally amplified tr[...]

  • Page 11

    W arranty and Service 18 19 Limited T wo Y ear W arranty COBRA ELECTRONICS CORPORA TION warrants that its COBRA citizens band (CB) radio, and the component parts thereof, will be fr ee of defects in workman- ship and materials for period of two (2) year fr om the date of first consumer pur- chase. This warranty may be enforced by the first consumer[...]