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SHIGH PERFORMANCE CONTINUOUS DUTY MULTI-MODEBASE/REPEATER STATIONS

UNCOMPROMISING QUALITYThe Midland Base Tech specifications exceed those of anyother equipment in its class. It is designed for exceptional reliability and flexibility. Midland has sold thousands of Base Tech stations to the U.S. Forest Service, Bureau of Land Management, and many other government agencies. The highly reliable Base Tech II & III are best in class for High RF Environments, features easy configuration with minimum maintenance and is completely tested/tuned by highly trained technicians lending Midland the confidence to offer a 5 year warranty on all Base Tech parts and labor.

BUILT-IN RELIABILITYRated for 100% continuous duty, the Midland Base tech isbuilt to withstand even the most severe working conditions, 24 hours a day, 7 days a week, 365 days a year. All Midland Base Tech base station/repeaters come with a 5 year warranty, an industry first. Midland is confident in offering the 5 year warranty because of it’s high reliability rate: Means Time Between Failure (MTBF) of less than 0.991%. Fully protected from high temperature and high VSWR by automatically adjusting the output power to a safe level until conditions return to normal.

FLEXIBLE MULTI-CHANNEL CAPABILITYThe Midland Base Tech is designed to be custom configured to meet your exact system requirements. The analog Base Tech II has multi-mode operation, 99 channel capacity, wide and narrow channel spacing per channel, low or high power, CTCSS / DCS (optional), and 5-Tone and DTMF. The P25 Base Tech III has multi-mode operation, 500 channel capacity, wide and narrow channel spacing per channel, low or high power, and standby current of less than 300mA.

EVERYTHING YOU NEED IN A HIGH PERFORMANCE STATIONThe Midland Base Tech is programmable by channel for direct or repeat operation. Front panel operations include power switch volume, squelch, LCD backlight dimmer, LCD backlight timer, keypad, earphone/speaker jack, TX high power adjust, and TX low power adjust. TX Power and RX signal strength are displayed in a bar graph format. Built in COR (Carrier Operated Relay) and TOT (Time-Out-Timer). Cabinet or rack mountable.

PROJECT 25

INDUSTRY FIRST- FIVE YEAR WARRANTY

SHOWN WITH OPTIONAL HOUSING

BASE TECH III

BASE TECH SERIES

MODEL 91-1060 A/B 91-1110 A/B 91-4050 A/B/C 91-4100 A/B/C 91-7100R 91-7100B 91-8100R 91-8100B

Primary Power

CTCSS

DCS

ChannelSpacing

OperatingTemperature

FCC Identifier MMA911060 MMA911110B MMA914050B MMA914100B MMA917100R MMA917100B MMA918100R MMA918100B

FCC Compliance

Modulation

Data Rate

Symbol Rate

Protocol

ChannelCapacity

Operating Voltage Range

Display

Keypad

Weight

2.5 kHz / 5.0 kHz / 6.25 kHz 5.0 kHz / 6.25 kHzChannelStepping

21.6 to 26.4 VDC

24 lbs. (11 kg)

~950 mA

TX DC input power 100 - 300 watts depending upon RF power setting.

P25 9600 b/s

P25 4800 b/s

Project P25 CAI: 4400 b/s AMBE+2

AES-DES

<280 mA

20 key

3.4 x 18.2 x 14.2 inches (88 x 462 x 360 mm)

Programmable by Channel

Programmable by Channel

12.5 kHz / 25 kHz

806-825 MHz RX

851-870 MHz

TX851-870 MHz

RX806-825 MHz

TXTX792-806 MHz

RX762-776 MHz

Dimensions(HxWxD)

13.6 Volts DC- 120 Volts AC

TX762-776 MHz

RX792-806 MHz

24 Volts DC

-22˚F to +140˚F (-30˚C to +60˚C)

VHFA:136-156 MHzB:146-174 MHz

VHFA:136-156 MHzB:146-174 MHz

UHFA:400-435 MHzB:440-475 MHzC:465-500 MHz

EncryptionAlgorithms

Standby Current Drain

Operating Range 12.2 to 15.0 VDC, Absolute Range 10.5 to 16.3

Stand-by DC input power 8 watts

DC Input Power 15 watts

4 Line x 20 Character LCD

RX CurrentDrain

GENERAL SPECIFICATIONS

11K2F3E, 11K2F2D, 11K2F1D, 11K2F1E, 16K0F3E

~16A ~11A ~18A

Part 90

11K2F3E, 11K2F2D, 11K2F1D, 11K2F1E, 16K0F3E

12.5 kHz C4FM FM: 25 / 12.5 kHz

Frequency Range

UHFA:400-435 MHzB:440-475 MHzC:465-500 MHz

TX CurrentDrain ~10A

500 Channels

MODEL 91-1060 A/B 91-1110 A/B 91-4050 A/B/C 91-4100 A/B/C 91-7100R 91-7100B 91-8100R 91-8100B

RX Frequency Separation

Frequency Step(KHz)

Rated Audio Output Power*

IntermodulationRejection*

Audio Output(Method @ <5% THD)

0.5 PPM

12.5 / 25

6.25 / 7.5 / 10 / 12.52.5 / 5 / 10 / 12.5

RECEIVER SPECIFICATIONS

Frequency RangeVHF

A:136-156 MHzB:146-174 MHz

SpuriousResponseRejection

Channel Spacing(kHz)

-85 dB or more

-100 dB or more

TX792-806 MHz

RX762-776 MHz

TX762-776 MHz

RX792-806 MHz

7.5 / 12.5 / 25 12.5 / 25

-80 dB

-100 dB

TX851-870 MHz

RX806-825 MHz

TX806-825 MHz

RX851-870 MHz

FrequencyStability*(-30C / +60C; 25C ref)

1.5 PPM VHF (higher stability optional)

VHFA:136-156 MHzB:146-174 MHz

UHFA:400-435 MHzB:440-475 MHzC:465-500 MHz

UHFA:400-435 MHzB:440-475 MHzC:465-500 MHz

Full Sub Band

7.5 W @ 8Ω / 10 W @ 4Ω

7.5 Watts @ 8Ω / 10 Watts @ 4Ω

Analog 25 kHz channel*

Analog 12.5 kHz channel*

Digital 12.5 kHz channel**

Adjacent Channel Rejection

Analog 25 kHz channel*

Analog 12.5 kHz channel*

Digital 12.5 kHz channel**

Audio Distortion* <2.0%

Hum and Noise Ratio

-50 dB or more

-45 dB or more

-50 dB or more

-45 dB

-45 dB

-45 dB

Sensitivity Analog < -117 dBm (@12dB SINAD / Digital < -117 dBm (5% BER) .30uV

-85 dB

-80 dB

-80 dB

Selectivity: -70 dB

-60 dB

-60 dB

MODEL 91-1060 A/B 91-1110 A/B 91-4050 A/B/C 91-4100 A/B/C 91-7100R 91-7100B 91-8100R 91-8100B

FrequencySeparation

Channel Spacing (kHz)

Frequency Step (kHz)

Rated RF Output Power 25 - 60 Watts 5 - 110 Watts 25 - 50 Watts 50 - 100 Watts

Frequency Stability(-30C / +60C)

Modulation Limiting

C4FM Modulation Fidelity

RMS Error

C4FM Deviation

Spurious and Harmonics

Spurious Emissions

Audio Frequency Response

(6dB/Octave Pre-emphasis from 300 to 3000Hz)

FM Hum and Noise Ratio

Analog25 kHz channel

Analog12.5 kHz channel

Duty Cycle

TRANSMITTER SPECIFICATIONS

Continuous

50 dB

45 dB

50 dB

45 dB

-80 dBc

-80 dBc -80 dB<

+1, -3 dB

5 kHz / 2.5 kHz

≤2%

1800 Hz ± 100

2.5 / 5.0 / 6.25 5.0 / 6.25

25 - 100 Watts

1.5 PPM (higher stability optional) 0.1 PPM (P-25) 0.5 PPM (Conventional)

12.5 / 25 12.5 / 25

UHFA:400-435 MHzB:440-475 MHzC:465-500 MHz

UHFA:400-435 MHzB:440-475 MHzC:465-500 MHz

TX762-776 MHz

RX792-806 MHz

TX792-806 MHz

RX762-776 MHz

Full Sub Band

TX851-870 MHz

RX806-825 MHz

TX806-825 MHz

RX851-870 MHz

Frequency RangeVHF

A:136-156 MHzB:146-174 MHz

VHFA:136-156 MHzB:146-174 MHz

5 kHz / 2.5 kHz

-80 dBc

+1, -3 dB

Base Tech III features and specifications subject to change without notice.

≤5%

1800 Hz ± 100

Audio Distortion <2%

MaximumDeviation

2.5 or 5 kHz Programmable by Channel

HIGH PERFORMANCE CONTINUOUS DUTY MULTI-MODEBASE/REPEATER STATIONS

BASE TECH SERIES

BASE TECH IIANALOG BASE STATION / REPEATER

• Up to 110 Watts TX Output Power• VHF Low Band, VHF High Band, and UHF• High Reliability• Suitable for High RF Noise Environments• 99 Channel Capacity• Programmable 12.5 / 25 kHz by Channel• Multi-Mode Operation• Low or High Power• Programmable CTCSS / DCS Tones (Optional)• 5-Tone and DTMF• 100% Duty Cycle• Cross Banding• Remote Dispatch• Optional Voter Stations• Auxiliary Receivers• Simulcasting (Optional)• Low Maintenance• TX / RX Bar Graph Display• Built-in Carrier Operated Relay (COR)• Time-Out-Timer (TOT)• Battery Backup Options

BASE TECH IIIANALOG / DIGITAL BASE STATION / REPEATER

• Up to 100 Watts TX Output Power• VHF and UHF• High Reliability - Remote Site Operation Reliability Rate >0.991%• Suitable for High RF Noise Environments• Programmable by Channel for Digital or Conventional Modulation, or Mix Mode• 500 Channel Capacity• 100% Duty Cycle• Cross Banding Real Time• Multi-Mode Operation• <300mA Standby Current• Optional DES / AES Encryption• Programmable Analog CTCSS / DCS Tones• Programmable by Channel for Base Station or Repeater Operation• Remote Dispatch• Optional IP Phone, and Tone Remote Interface• CW ID-Standard• Project P25 Common Air Interface Operation• Low Maintenance• TX / RX Bar Graph Display• Built-in Carrier Operated Relay (COR)• Time-Out-Timer (TOT)• Battery Backup Options

MIDLAND RADIO CORPORATION5900 Parretta Drive, Kansas City, MO 64120 USATel: 816-241-8500, Fax: 816-241-5713Email: mail@midlandradio.comWWW.MIDLANDRADIO.COM

FOR MORE INFORMATION, CONTACT:

BASE TECH SERIES

COMMUNICATION

WWW.MIDLANDRADIO.COM

BASE TECH II

SHOWN WITH OPTIONAL HOUSINGBASE TECH II

MODEL 71-0150 71-0110 71-3050 71-3110 71-4050 71-4110

Primary Power

Channel Capacity

CTCSS

DCS Programmable by Channel with Optional 71-8219 DCS Encode/Decode Kit

5 Tone

DTMF

Channel Spacing

Channel Stepping

Programmable by Channel

Programmable

Programmable

136-156 MHz (A)150-174 MHz (B)

VHF150-174 MHz (B)

UHF400-435 MHz (A)440-475 MHz (B)465-500 MHz (C)

UHF440-475 MHz (B)

13.6 VDC

Frequency Range

Low Band30-40 MHz (A)35-45 MHz (B)40-50 MHz (C)

VHFLow Band35-45 MHz (B)40-50 MHz (C)

99

20 KHz

2.5 kHz

-22˚F to +140˚F (-30˚C to +60˚C)

12.5 / 25 kHz by Channel

GENERAL SPECIFICATIONS

MODEL 71-0150 71-0110 71-3050 71-3110 71-4050 71-4110RECEIVER SPECIFICATIONS

Sensitivity 13.6 VDC

RX FrequencySeparation

Selectivity25 / 12.5 kHz

SpuriousRejection

Audio Output

Stability

Intermodulation

1.5 MHz

87 dB 87 dB / 80 dB 85 dB / 80 dB

85 dB 85 dB

100 dB

7.5 Watts @ 8Ω10 Watts @ 4Ω

1.5 PPM

75 dB

3.0 MHz (Dual front end available)

MODEL 71-0150 71-0110 71-3050 71-3110 71-4050 71-4110TRANSMITTER SPECIFICATIONS

Modulation 13.6 VDC

25-50 W

Full Band Full Band Full Band2.5 MHz 2.5 MHz

85 dB

50 dB

2%

1.5 PPM

100%

2.5 MHz

50-100 W 25-60 W 50-110 W 25-50 W 50-100 WRF Power Output(Continuous)

TX

TX Bandwidth & Harmonics

FM Hum & Noise

Audio Distortion

TX Stability

Duty Cycle

Base Tech II features and specifications subject to change without notice.