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IC-281H - Mobile 2m FM Amateur Transceiver | Radioaficion Ham Radio

IC-281H - Mobile 2m FM Amateur Transceiver


ICOM IC-281H - Mobile 2m FM Amateur Transceiver

Manufactured: Japan, 1994-199x (Discontinued)

IC-281H - Mobile 2m FM Amateur Transceiver

Quick Specs
2m mobile transceiver
RX: 144-148 MHz; 440-450 MHz
TX: 144-148 MHz
Output power: 50 W
Modes: FM
Receiver sensitivity: 0.16 µV (FM, 12 dB SINAD)
CTCSS encode standard, CTCSS decode (tone squelch) optional

Detailed Specifications:


  • Frequency Coverage: Main Rx/Tx: 144~148 MHz, Bonus Rx/Tx: 440~450 MHz
  • Tuning Step Increments: 5, 10, 12.5, 20, 25, 30, or 50 kHz.
  • Number of Memory Channels: 60 regular, 2 call, 10 scratch pads and 12 scan edges.
  • Mode: FM (F3)
  • Antenna Impedance: 50 ohms nominal
  • Power Supply Requirement: 13.8 V DC+/-15% (negative ground)
  • Current Drain (at 13.8 V DC)- Transmit: 10.5 A (high), 5.5 A (mid), 4.0 A (low)
  • Current Drain (at 13.8 V DC) - Receive: 1.0 A (max. audio output) 0.8 A (Stand-by)
  • Frequency Stability: +/-10 ppm (-10ºC to +60ºC)
  • Usable Temperature Range: -10ºC to +60ºC; +14ºF to +140ºF
  • Dimensions (projections not included): 140(W) x 40(H) x 171(D) mm, 5.5(W) x 1.6(H) x 6.7(D) in
  • Weight: 930 g; 2.1 lb.


  • Output Power (selectable): 50 W, 10W, 5W
  • Modulation System: Variable reactance frequency modulation
  • Max. Frequency Deviation: +/-5.0 kHz
  • Spurious Emissions: Less than -60 dB
  • Microphone Impedance: 600 ohms


  • Receive System: Double conversion superheterodyne
  • Sensitivity: Main band - Less than 0.16 µV for 12 dB SINAD, Bonus band - Less than 0.2 µV for 12 dB SINAD
  • Squelch Sensitivity: Less than 0.13 µV
  • Spurious Response Rejection: More than 60 dB
  • Audio Output Power: More than 2.4 W at 10% distortion with an 8 ohms load.
  • Audio Output Impedance: 4-8 ohms.

IC-281H Options


  • UT-66 VOICE SYNTHESIZER UNIT: A clear, electronically generated voice announces the operating frequency in English or Japanese.
  • UT-85 TONE SQUELCH UNIT: Provides pocket beep, tone squelch and tone scan functions and ensures quiet standby. Can also be used as a subaudible tone encoder.


  • SP-7 EXTERNAL SPEAKER: Large speaker suitable for base station operation. Input impedance: 8 ohms; Max. input power: 5 W.
  • SP-10 EXTERNAL SPEAKER: Compact design provides excellent audio in your vehicle. Input impedance: 4 ohms; Max. input power: 5 W.
  • SP-12 EXTERNAL SPEAKER: Slim-type speaker for mobile operation. Can be easily installed on a sun visor, dashboard, etc. Input impedance: 8 ohms; Max. input power: 3 W.


  • IC-PS30 DC POWER SUPPLY: Equipped with 3 output connectors. Output voltage: 13.5 V DC; Max. Current Drain: 25 A.


  • OPC-345 DC POWER CABLE: Supplied with the IC-481H. Cable length: 3 m(9.8 ft); capacity: 15 A
  • OPC-346 DC POWER CABLE: Supplied with the IC-281H. Cable length: 3 m(9.8 ft); capacity: 20 A
  • OPC-347 DC POWER CABLE: Cable length: 7 m(23.0 ft); capacity: 20 A
  • OPC-440 MIC EXTENSION CABLE: Extends the microphone cable. Cable length: 5.0 m(16.4 ft).


  • HM-77 DTMF MICROPHONE: Equipped with 14 DTMF code memory channels for auto dialing and 1750 Hz tone call functions. Also provides remote control capabilities.
  • HM-79 HAND MICROPHONE: Equipped with 1750 Hz tone call function.


  • MB-17A MOBILE MOUNTING BRACKET: One-touch bracket. Transceiver body is easily attached and removed.
  • MB-27 MOBILE MOUNTING BRACKET: Same as the supplied one.
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