Icom ID-51A PLUS2

Icom ID-51A PLUS2 firmware

Icom · ID-51A PLUS2 · ID-51A PLUS2 · Handheld

Latest firmware for the Icom ID-51A PLUS2 is vE4 (January 31, 2020).

Specifications

ID-51A PLUS2 specifications

Type
Amateur VHF/UHF transceiver
Frequency range
USA / TX: 144-148 / 430-450 MHz / RX: 0.52-1.710 / 76-108 / 108-174 / 380-479 MHz
Modes
TX: FM / NFM and DV (GMSK: 4.8 kbps voice), Improved DR-mode / RX: AM / FM / NFM / WFM and DV (GMSK: 4.8 kbps voice), Improved DR-mode
Show the full specification

General

Mode
TX: FM / NFM and DV (GMSK: 4.8 kbps voice), Improved DR-mode RX: AM / FM / NFM / WFM and DV (GMSK: 4.8 kbps voice), Improved DR-mode
Type
Amateur VHF/UHF transceiver
Weight
255 g (8.99 oz), with BP-271 and antenna)
Power supply
5.5-7.4 VDC (Depending on battery pack) or 10-16 VDC external
Tuning steps
5 / 6.25 / 8.33 / 9 / 10 / 12.5 / 15 / 20 / 25 / 30 / 50 / 100 / 125 / 200 KHz
Other features
D-Star concept. Built-in GPS with logging. CTCSS and DTCS Micro SD card slot. 128*104 dot-matrix display. Voice synthesizer. Voice memory. Voltage indicator. IPX7 waterproof. Twin RX (V/V, U/U & V/U). This special edition model has new "Terminal" and "Access point" modes, which enables connection to the D-Star network through the internet from areas without D-Star repeaters.
Frequency range
USA TX: 144-148 / 430-450 MHz RX: 0.52-1.710 / 76-108 / 108-174 / 380-479 MHz
Dimensions (W*H*D)
58*105*26 mm (2.28*4.13*1.02")
Frequency stability
Max ? ppm
Repeater shift / offset
±
Channels / memory management
1304 (Total) with alpha tags
Antenna impedance / connector
50 ohm / SMA
Current drain / power consumption
RX: 200-450 mA TX: Max 2.5 A

Miscellaneous

Manufactured
Japan, 2016-2020 (Discontinued)

Receiver Section

Selectivity
FM 55 dB NFM/DV 50 dB
Sensitivity
FM/NFM: 0.18 uV (12 dB SINAD) DV: 0.28 uV (1% BER)
Receiver system
? conversion superheterodyne
AF output power / speaker
? mW at ?% distortion / ? ohm

Transmitter Section

RF output power
HighMidLow 2Low 1S-Low 2 m:5 W2.5 W1 W500 mW100 mW 70 cm:5 W2.5 W1 W500 mW100 mW
Spurious emissions
Better than -? dB
Microphone input level
? mV
Max FM deviation (Factory set)
FM: ±5 KHz NFM: ±2.5 KHz
Max AM modulation (Factory set)
No AM
Microphone impedance / connector
? ohm / ?-pin

Changelog

ID-51A PLUS2 firmware changelog

  1. vE3 vE4 Fixes standby beep delay when using PTT to key repeater; updates DSP firmware to 1.05

  2. vE2 vE3 Fixes call-ending frame issues causing standby beep delays and repeater transmission problems

  3. vE1 vE2 Removes delay in standby beep when using third-party DV equipment; updates DSP firmware to 1.03.

  4. vE1 first tracked Fixed data loss in DV Fast Data mode; DSP firmware updated to 1.02

Firmware history

All versions below were published by Icom on icomjapan.com, icomamerica.com, icomeurope.com and icom.co.jp. Third-party and modified firmware is never listed.

  1. Version E4 Latest Released Jan 31, 2020 First seen Sep 6, 2026

    Fixes standby beep delay when using PTT to key repeater; updates DSP firmware to 1.05 — summary by updatemystuff.com

    Source: icomjapan.com

    Show release notes

    Changes from Release E3

    Fixed the problem where the standby beep may sound approximately two seconds after receivi​ng a reply when simply pushing PTT to key up the repeater. This occurred on transceivers using Release E2 or Release E3 firmware.

    To update the firmware

    Thoroughly read " Firmware update instructions " and follow the instruc​tions in it.

    An OPC-2350LU or OPC-2218LU is required to install the firmware update. To use the OPC-2218LU for the first time, a USB driver is required. Download the driver here .

    Making a backup file of programmed contents and settings before updating the firmware is recommended.

    The DSP firmware will be updated to 1.05.

    Release notes & download
  2. Version E3 Released Dec 13, 2019 First seen Sep 7, 2026

    Fixes call-ending frame issues causing standby beep delays and repeater transmission problems — summary by updatemystuff.com

    Source: icomjapan.com

    Show release notes

    Changes from Release E2

    Fixed the problem where the call-ending frame may not be sent when transmitting the D-PRS DV-A or NMEA DV-G position data in the DV mode using Release E1 or Release E2 firmware.

    Release E3 fixes the following problems.

    The call-ending frame was not sent​ after releasing PTT. This caused a delay in sounding the standby beep from the receiving transceiver.

    The repeater does not stop transmitting the downlink soon after the transceiver finishes transmitting the u​plink.

    To update the firmware

    Thoroughly read " Firmware update instructions " and follow the instructions in it.

    An OPC-2350LU or OPC-2218LU is required to install the firmware update. To use the OPC-2218LU for the first time, a USB driver is required. Download the driver here .

    Making a backup file of programmed contents and settings before updating the firmware is recommended.

    The DSP firmware will be updated to 1.04.

    Release notes & download
  3. Version E2 Released Dec 5, 2019 First seen Sep 7, 2026

    Removes delay in standby beep when using third-party DV equipment; updates DSP firmware to 1.03. — summary by updatemystuff.com

    Source: icomjapan.com

    Show release notes

    Changes from Release E1

    With the previous firmware, there was a delay in sounding the standby beep when the transceiver communicated with other manufacturers' DV equipment*.

    With the l​atest firmware, the transceiver sounds the standby beep with no delay, even when the transceiver communicates with other manufacturers' DV equipment.

    • It does not occur when directly communicating with transceivers and/or application software made by Icom or Kenwood.

    To update the firmware

    Thorou​ghly read " Firmware update instructions " and follow the instructions in it.

    An OPC-2350LU or OPC-2218LU is required to install the firmware update. To use the OPC-2218LU for the first time, a USB driver is required. Download the driver here .

    Making a backup file of programmed contents and settings before updating the firmware is recommended.

    The DSP firmware will be updated to 1.03.

    Release notes & download
  4. Version E1 Released Nov 6, 2019 First seen Sep 7, 2026

    Fixed data loss in DV Fast Data mode; DSP firmware updated to 1.02 — summary by updatemystuff.com

    Source: icomjapan.com

    Show release notes

    Changes in this Version

    Fixed an issue where d​ata loss may occur while communicating in the DV Fast Data mode.

    To update the firmware

    Thoroughly read " Firmware update instructions " and follow the instructions in it.

    An OPC-2350LU or OPC-2218LU is required to install the ​firmware update. To use the OPC-2218LU for the first time, a USB driver is required. Download the driver here .

    Making a backup file of programmed contents and settings before updating the firmware is recommended.

    The DSP firmware will be updated to 1.02.

    Release notes & download

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