Kenwood TM-281


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Kenwood TM-281

Kenwood TM-281

Key Features

65 Watt RF Output
Rugged Construction to US MIL-STD
100 Alpha-tagged Memories
High-Quality Front Mounted Loudspeaker
Built-In CTCSS/DCS Encoder/Decoder
Replaces previous TM-271E model

Supplied With

Kenwood TM-281

D.C. Cable Yes
Instruction Manual Yes
Microphone Yes, MC-59 Keypad Hand Microphone
Microphone Hanger Yes
Mounting Bracket Yes
Screw Set Yes

Amateur Radio General Features

Kenwood TM-281

1750 Hz Tone Burst Function. Yes
Alphanumeric LCD Display Yes
Antenna Socket N-Type
Auto Power Off Yes
Auto Repeater Offset Yes
Automatic Simplex Checker Yes
Busy Channel Lock-out Yes
Channel Display Mode Yes
CTCSS Encoder/Decoder Yes, 42 EIA Tones with Tone Scan function
DCS Encoder/Decoder Yes, 104 Tones with Tone Scan function
Direct Frequency Entry Yes
High-Quality Front Speaker Yes
Illuminated Front Panel Keys Yes
Key Beep On/Off Yes
Key Lock Yes
Loudspeaker Socket 3.5 mm
Memory Channel Lock-out Yes
Memory Channels 201 Channels
Memory Channels with Alpha-tagging 100 Memory Channels
Menu System for individual set-up Yes
Microphone Socket RJ-45
MR-Shift Yes
Multiple Scan Functions Yes
PC Programmable Memories Yes
Power-On Message Yes
Reverse Repeater Checker Yes
Time-Out Timer Yes
Variable LCD Brightness with Automatic Dimmer Yes
Wide/Narrow Deviation Selection Yes
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Amateur Mobile Specifications

Kenwood TM-281

RF Output Power (approx.) – High 65 W
RF Output Power (approx.) – Low 25 W
TX Frequency Coverage – VHF 144 MHz to 146 MHz
RX Frequency Coverage – VHF 136 – 174 MHz
Transmitter Modulation Variable-Reactance modulation
Transmitter Modulation Distortion Less than 3% (300 Hz to 3 kHz)
Transmitter Maximum Frequency Deviation – Wide ± 5 kHz
Antenna Impedance – 50 Ohm Yes
Audio Output Power More than 2 W (5% Distortion)
Weight 1.13 kg (approx.)
Current Drain – RX Less than 1 A
Current Drain – TX Less than 14 A (Hi-Power), Less than 8 A (Low-Power)
Dimensions 160 mm (W) x 43 mm (H) x 126 mm (D) – excluding projections
Frequency Stability ± 2.5 ppm (-20 °C to +60 °C)
Microphone Impedance 600 Ohms
Modes – F3E FM Yes
Operating Temperature Range -20 °C to +60 °C
Power Requirement – 13.8 V DC ± 15% Yes
Receiver Circuitry Double Super Heterodyne
Receiver Intermediate Frequency – 1st IF 49.95 MHz
Receiver Intermediate Frequency – 2nd IF 450 kHz
Receiver Selectivity – Narrow More than 10 kHz at -6 dB, Less than 24 kHz at -60 dB
Receiver Selectivity – Wide More than 12 kHz at -6 dB, Less than 30 kHz at -60 dB
Receiver Sensitivity – Narrow Less than 0.22 µV at 12 dB SINAD
Receiver Sensitivity – Wide Less than 0.18 µV at 12 dB SINAD
Receiver Squelch Sensitivity Less than 0.1 µV


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