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Midland Base Tech II UHF Band Repeaters

General Specification 71-4050RA 71-4050RB 71-4050RC 71-4110RA 71-4110RB
Frequency Range 400-435 MHz 440-475 MHz 465-500 MHz 400-435 MHz 440-475 MHz
TX Power Transmit  25-50W 25-50W 25-50W 50-100 W 50-100W
Primary Power 13.6V DC 13.6V DC 13.6V DC 13.6V DC 13.6V DC
Power Supply 12 Amp 12 Amp 12 Amp 25 Amp 25 Amp
Channel Capacity 99 99 99 99 99
CTCSS Programmable by channel
DCS Option, Programmable by channel
5 Tones  Programmable by channel
DTMF Programmable
Scrambler Programmable option voice inversion type
Duplexer Optional Optional Optional Optional Optional
Channel b/w 12.5 kHz / 25 kHz 12.5 kHz / 25 kHz 12.5 kHz / 25 kHz 12.5 kHz / 25 kHz 12.5 kHz / 25 kHz
Channel Stepping 2,5 kHz 2,5 kHz 2,5 kHz 2,5 kHz 2,5 kHz
Operating  Temperature -30°C to +60°C -30°C to +60°C -30°C to +60°C -30°C to +60°C -30°C to +60°C

 

Receiver Specifications  
Sensitivity 0.35 µV 0.35 µV 0.35 µV 0.35 µV 0.35 µV
RX Frequency Separation  3.0 MHz (dual front end available)
Selectivity 25/12.5kHz  90 dB / 80 dB 90 dB / 80 dB 90 dB / 80 dB 90 dB / 80 dB 90 dB / 80 dB
Intermodulation  85 dB / 70 dB 85 dB / 70 dB 85 dB / 70 dB 85 dB / 70 dB 85 dB / 70 dB
Spurious Rejection  100 dB 100 dB 100 dB 100 dB 100 dB
Audio output  7.5 Watt 7.5 Watt 7.5 Watt 7.5 Watt 7.5 Watt
Squelch Sensitivity  < 8 dB sinad < 8 dB sinad < 8 dB sinad < 8 dB sinad < 8 dB sinad
Frequency Stability  1.5 PPM 1.5 PPM 1.5 PPM 1.5 PPM 1.5 PPM
RX Input Impedance  50 ohms 50 ohms 50 ohms 50 ohms 50 ohms

 

Transmitter Specifications  
RF Power Output (continuous) 25/50 Watts * 25/50 Watts * 25/50 Watts * 50/100 Watts * 50/100 Watts *
Modulation  2.5 kHz or 5 kHz maximum programmable by channel
TX Frequency Separation Full Band Full Band Full Band Full Band Full Band
TX Spurious and Harmonics 80 dB 80 dB 80 dB 80 dB 80 dB
FM & Hum Noise 50 dB 50 dB 50 dB 50 dB 50 dB
Audio Distortion 3% 3% 3% 3% 3%
Duty Cycle 100% 100% 100% 100% 100%
Frequency Stability 1.5 PPM 1.5 PPM 1.5 PPM 1.5 PPM 1.5 PPM
TX Output Impedance 50 ohms 50 ohms 50 ohms 50 ohms 50 ohms

 * - Higher power option available Complies with NTIA specifications

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Phone/Fax (434) 237-8255 • (800) 488-7908
78 Airpark Drive • Lynchburg, Virginia  24502
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