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IC-U28 - Land Mobile Portable UHF Radio


Quick Specs
Portable UHF Transceiver
RX/TX: see detailed specifications
Output power: 5 W
Modes: FM
Receiver sensitivity: 0.28 µV (FM, 12 dB SINAD)
CTCSS standard
2-tone, DTMF and DTCS optional (see detailed specifications)


Detailed Specifications


  • Frequency Coverage:
    450-480 MHz
    480-512 MHz
    480-512 MHz
    403-430 MHz
    450-470 MHz
    480-500 MHz
    490-512 MHz
    410-430 MHz
    Ask your Icom dealer for permitted frequency range in your area.
  • Mode: FM (16K0F3E)
  • Number of channels: Up to 16
  • Channel spacing: 25 kHz
  • Useable battery pack: CM-80, CM-92
  • Usable Temperature Range: -30°C to +60°C; -22°F to +140°F
  • Frequency stability: ±0.0005% (-30°C to +60°C)
  • Dimensions (with CM-80): 58(W) x 149(H) x 29(D) mm; 2.3(W) x 5.9(H) x 1.1(D) in (projections not included)
  • Weight (with CM-80): 440 g; 15.5 oz
  • Shock or vibration: Meets or exceeds all EIA RS-316B
  • Programmable CTCSS tone: All EIA standard frequencies
  • Optional DTMF keyboard: 3 x 4 keyboard, 12 standard DTMF tones


  • Output power (with CM-80):
    High: 5 W
    Low 1: 2 W
    Low 2: 1 W
  • Max. frequency deviation: ±5 kHz; ±2.5 kHz (narrow type)
  • Spurious emissions: -65 dB
  • Harmonic emissions: -65 dB
  • FM noise and hum: -45 dB; -40 dB (narrow type)


  • Sensitivity (for 12 dB SINAD): 0.28 µV
  • Squelch sensitivity (threshold): 0.28 µV
  • Adjacent channel selectivity: -70 dB; -60 dB (narrow type)
  • Spurious response rejection: -70 dB
  • Audio output power: 500 mW with an 8 ohm load


There are versions that conform to intrinsically safe ratings of the FMRC (Factory Mutual Research Corporation). Ask your ICOM dealer for details.

  • Intrinsically safe: Class I, II and III; Division 1, Groups C, D, E, F and G
  • Nonincentive: Class I, Division 2, Groups A, B, C and D
  • Max. temperature range: T4A
  • Connected battery pack: CM-92 or CM-97

IC-U28 Options

Some versions cannot use all options listed below, since type approvals for the IC-U28 vary between countries. Ask your ICOM dealer for details.

  • AD-10 CHARGER ADAPTER: Allows you to charge the CM-80 or CM-92 with the CM-60A.
  • BM-77U/E DESKTOP CHARGER: Rapidly charges the CM-80 or CM-92 in 1 hr. and the CM-97 in 3 hrs.
  • BM-82U/E DESKTOP CHARGER: Rapidly charges the CM-80, CM-92 or CM-97 in 80 min.
  • CM-60A MULTI-CHARGER: Simultaneously charges up to 6 separate CM-80's and CM-92's in 5 hrs. The AD-10 is required for each battery pack.
  • CM-80 BATTERY PACK: Voltage: 7.2 V; Capacity: 600 mAh. Non-intrinsically safe.
  • CM-92 BATTERY PACK: Voltage: 7.2 V; Capacity: 600 mAh. Intrinsically safe.
  • CM-97 BATTERY PACK: Voltage: 7.2 V; Capacity: 1400 mAh. Intrinsically safe.
  • EM-74 SPEAKER-MICROPHONE: Combination speaker and microphone. Clips to your shirt or lapel.
  • UT-68 2-TONE DECODER UNIT: A 2-tone system that receives only specific stations and provides a "personalized" squelch.
  • UT-69 DTCS ENCODER/DECODER UNIT: Ensures quiet stand-by with a 3-digit code. Capable of all the standard 177 digital codes.
  • UT-77 DTMF ENCODER UNIT: Provides autopatch operation.
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