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This license-free model has the default 8 PMR-channels and transmits 500 mW.
The following modifications can be made:
* Extend frequency range
* Add FM (next to N-FM)
* 99 channels
* 5 W transmit power

General characteristics

HAM bands
11m (CB)  70cm 
Frequency stability
± 2.5 p.p.m.
Tuning steps
?

Receiver

RX-range
446.00625-446.09375 MHz (All PMR446 channels)
440-471 MHz (after modification)
Modulations
FM   N-FM  
Sensitivity
≤ 0.5 μV @ 20 dB SINAD
Selectivity
?
Filters
?
Receiver system
?
IF-frequencies
?
Image rejection
?
Audio output
?

Transmitter

TX-range
446.00625-446.09375 MHz (All PMR446 channels)
440-471 MHz (after modification)
Modulations
FM   N-FM  
RF-output
0.5 / 5 W

Connections

Antenna
-
Impedance
50Ω
Other
-

Electrical

Power requirements
12 V DC ±10%
Current drain RX
?
TX
?

Physical

Manufactured
Between 2015 and 201x in China
Dimensions (w×h×d)
100 × 22 × 85 mm (3.94 × 0.87 × 3.35 in)
Weight
220 gr (7.8 oz)
Form factor
Mobile

Other features

Memories
8 channels in 1 bank(s)
Usage
Private Mobile Radio, 446 MHz
Features + options
CTCSS/PL + DCS
Display can be flipped 180° which allows for mounting upside down
Accessories
PRG-GB1: Programming cable and software
MPN
MIDLAND-GB000001

Manuals, diagrams and brochures

Midland GB1 User Manual PDF - 1.23 MB, submitted by elmer
 
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