Motorola MX300S Handheld VHF/UHF Transceiver

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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 MX300S is the synthesized model of the MX300. Rather than installing RX and TX crystals for each channel, the frequencies are stored in a PROM (later in an EEPROM), organised in 4 banks of 12 channels each. Depending on the variant, 2, 4, 6, 8 or 12 channels are selectable. Furthermore, also depending on the variant, an additional rotary switch might be present to select up to 4 channel banks (marked A, B, C and D). Some versions had a scan option. Digital voice encryption was also available as on option.

Frequency range

RX-range
136-174 or 403-512 MHz MHz depending on version
TX-range
136-174 or 403-512 MHz MHz depending on version
HAM bands
-
Stability
-
Tuning steps
-
Filters
-

Receiver

Modulations
FM  
Sensitivity
-
Selectivity
-
Receiver system
-
IF-frequencies
-
Image rejection
-
Audio output
-

Transmitter

Modulations
FM  
RF-Output
VHF: 6/2.5/1 W, UHF: 4/2/1 W

Connections

Antenna
NMO
Impedance
50Ω

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 1975 and 19xx
MPN
MOTOROLA-MX000300S

Other features

Memories
48 channels in 1 bank(s)
Usage
Commercial / Land mobile communication
Features + options
-
Accessories
-

Manuals, diagrams and brochures

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