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The MX-300 was a handheld radio, developed by Motorola in 1975. Many different variants of this radio were developed, incuding VHF, UHF and SHF versions, ruggedized versions, crystal operated channels, versions with a frequency synthesizer, and optional Digital Voice Encryption.

The Motorola MX300R is the ruggedized version of the MX300. It has most of the features of the Motorola MX300S, but is housed in an intrinsicaly safe enclosure of which the outer skin is cast in rubber. As rubber is a natural product, it might lose some of its properties over time and become stiff and brittle. This model has different knobs on the control panel, which are also made of rubber (similar to the ones used with the later Motorola SABER radios).

General characteristics

HAM bands
?
Frequency stability
?
Tuning steps
?
Memories
48 channels in 1 bank(s)

Receiver

RX-range
136-174 or 403-512 MHz MHz depending on version
Modulations
FM  
Sensitivity
?
Selectivity
?
Filters
?
Receiver system
?
IF-frequencies
?
Image rejection
?
Audio output
?

Transmitter

TX-range
136-174 or 403-512 MHz MHz depending on version
Modulations
FM  
RF-output
VHF: 6/2.5/1 W, UHF: 4/2/1 W

Connections

Antenna
NMO
Impedance
50Ω
Other
-

Electrical

Power requirements
?
Current drain RX
?
TX
?

Physical

Dimensions (w×h×d)
72 × 164 × 36 mm (2.83 × 6.46 × 1.42 in)
Weight
673 gr (1.5 lbs) incl battery
Form factor
Handheld
Manufactured
Between 197x and 19xx

Other features

Usage
Military communication
Features + options
-
Accessories
-
RigReference ID
6251
MPN
MOTOROLA-MX000300R

Manuals, diagrams and brochures

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