Cobra 25 LTD 25LTDST - Page 3

Specifications FREQUENCY RANGE The COBRA 25 LTD ST transceiver represents one of the most advanced AM twoway radios ever designed for use 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 channels as shown below. Channel 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Channel Frequency in MHz 26.965 26.975 26.985 27.005 27.015 27.025 27.035 27.055 27.065 27.075 27.085 27.105 27.115 27.125 27.135 27.155 27.165 27.175 27.185 27.205 Channel 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 Channel Frequency in MHz 27.215 27.225 27.255 27.235 27.245 27.265 27.275 27.285 27.295 27.305 27.315 27.325 27.335 27.345 27.355 27.365 27.375 27.385 27.395 27.405 The COBRA 25 LTD ST has a vastly superior receiver which includes noise blanker circuitry and an automatic noise limiter. The receiver also features increased protection against cross modulation and strong adjacent channel signals. To obtain maximum performance please read carefully the descriptions and operating instructions in this manual. Fill out below; keep for your records. Serial No. Date of Purchase Dealer Name Keep this manual for detailed information about your Cobra CB radio. SAVE YOUR SALES RECEIPT, CARTON AND PACKING FOR POSSIBLE FUTURE USE. 2 Specifications (cont.) GENERAL Channels Frequency Range Frequency Control Frequency Tolerance Operating Temperature Range Microphone Input Voltage Current Drain Size Weight Antenna Connector Semiconductors Meter TRANSMITTER Power Output Modulation Frequency Response Output Impedance RECEIVER Sensitivity Selectivity Image Rejection Adjacent-Channel Rejection IF Frequencies Automatic Gain Control (AGC) RF Gain Control Noise Blanker Squelch Audio Output Power Frequency Response Distortion Built-in Speaker External Speaker (Not Supplied) PA SYSTEM Power Output External Speaker for PA (Not Supplied) 40 26.965 to 27.405 MHz. Phase Lock Loop (PLL) synthesizer. 0.005%. -30¡ C to + 50¡ C. Plug-in dynamic. 13.8VDC nom.(positive or negative ground). Transmit: AM full mod., 1.5A (maximum) Receive: Squelched, 0.3A; full audio output, 1.2A (nominal). 8 5/8Ó D x 7 9/32Ó W x 2 13/64Ó H . 4 lbs. UHF, SO-239. 26 transistors, 26 diodes, 4 integrated circuits. Illuminated; indicates relative power output and received signal strength. 4 watts. AM (Amplitude Modulation). 300 to 3000 Hz. 50 ohms, unbalanced. Less than 1 µV for 10dB (S+N)/N. 6dB @ 7 KHz, 60 dB @ 10 KHz. 80 dB, typical. 60 dB, typical. Double Conversion: 1st: 10.695 MHz. 2nd: 455 KHz. Less than 10 dB change in audio output for inputs from 10 to 50,000 microvolts. Adjustable for optimum signal reception. RF type. Adjustable; threshold less than 1µV. 4 watts. 300 to 3000 Hz. Less than 7% @ 3 watts @ 1000 Hz. 16 ohms, round. 8 ohms; disables internal speaker when connected. 4 watts into external speaker. 8 ohms, when PA-CB switch is in PA, the PA speaker also monitors the receiver; separate jack provided. (SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE) 3