Icom ID-4100A

Icom ID-4100A firmware

Icom · ID-4100A · ID-4100A

Latest firmware for the Icom ID-4100A is v1.05 (January 31, 2020).

Specifications

ID-4100A specifications

Type
Amateur VHF/UHF transceiver
Frequency range
USA / TX: 144-148 / 430-450 MHz / RX: 118-174 / 230-550 MHz
Modes
TX: FM / NFM / DV (D-Star) / RX: AM / FM / NFM / DV (D-Star)
Show the full specification

General

Mode
TX: FM / NFM / DV (D-Star) RX: AM / FM / NFM / DV (D-Star)
Type
Amateur VHF/UHF transceiver
Weight
1.2 Kg (2.6 lb)
Power supply
13.8 VDC ±15%
Tuning steps
5 / 6.25 / 8.33 / 10 / 12.5 / 15 / 20 / 25 / 30 / 50 KHz
Other features
DR (D-Star) repeater function. CTCSS/PL and DTCS. Built-in GPS with logging. Micro SD card slot. Bluetooth option for enhanced remote functionality. Speech synthesizer. This radio has the 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: 118-174 / 230-550 MHz
Dimensions (W*H*D)
150*40*172 mm (5.91*1.57*6.77")
Frequency stability
±2.5 ppm @ -10 to +60°C (14 to 140°F)
Repeater shift / offset
±0-59.995 MHz
Channels / memory management
1000 regular 2*25 program scan edge pairs 2*2 call Non-volatile EEPROM storage
Antenna impedance / connector
50 ohm / SO-239
Current drain / power consumption
RX: 0.9 to 1.2 A TX: 5 to 13 A

Miscellaneous

Manufactured
Japan, 2017-20xx

Receiver Section

Sensitivity
AM (10 dB S/N) 118-136 MHz: 1 uV 230-260 MHz: 5.6 uV 260-375 MHz: 1.8 uV FM/NFM (12 dB SINAD) 137-144 MHz: 0.32 uV 144-148 MHz: 0.18 uV 148-174 MHz: 0.32 uV 230-260 MHz: 1.8 uV 260-400 MHz: 0.56 uV 400-430 MHz: 0.32 uV 430-450 MHz: 0.18 uV 450-500 MHz: 0.32 uV 500-550 MHz: 0.56 uV DV (BER 1%) 144-148 MHz: 0.22 uV 430-450 MHz: 0.22 uV
Image rejection
60 dB
Receiver system
Double conversion superheterodyne 1st IF: 46.35 MHz 2nd IF: 450 KHz
AF output power / speaker
2 W at 10% distortion / 8 ohm
External speaker connector
3.5 mm, 8 ohm

Transmitter Section

RF output power
HighMidLow 2 m:50 W15 W5 W 70 cm:50 W15 W5 W
Modulation system
FM: Variable reactance frequency modulation DV: GMSK reactance frequency modulation
Spurious emissions
Better than -60 dBc
Microphone input level
? mV
Max FM deviation (Factory set)
FM: ±5 KHz NFM: ±2.5 KHz
Microphone impedance / connector
600 ohm / 8-pin (modular)

Changelog

ID-4100A firmware changelog

  1. v1.04 v1.05 Fixed standby beep sounding approximately two seconds after transmitting on repeaters

  2. v1.03 v1.04 Fixes call-ending frame transmission, resolving standby beep delays and repeater downlink issues

  3. v1.02 v1.03 Standby beep now sounds immediately when communicating with third-party DV equipment.

  4. v1.02 first tracked Fixed data loss issue occurring during DV Fast Data mode communication.

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 1.05 Latest Released Jan 31, 2020 First seen Sep 6, 2026

    Fixed standby beep sounding approximately two seconds after transmitting on repeaters — summary by updatemystuff.com

    Source: icomjapan.com

    Show release notes

    Changes from Version 1.04

    Fixed the problem where the standby beep may sound approximately two seconds after receiving a reply when simply pushing PTT to key up the repeater.​ This occurred on transceivers using Version 1.03 or Version 1.04 firmware.

    To update the firmware

    Thoroughly read 13. UPDATING THE FIRMWARE of the

    ADVANCED MANUAL

    and follow the instructions in it.

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

    The firmware will be updated to the following versions.

    CPU M: 1.05

    S: 1.00

    C: 1.01

    DSP: 1.03

    Release notes & download
  2. Version 1.04 Released Dec 13, 2019 First seen Sep 7, 2026

    Fixes call-ending frame transmission, resolving standby beep delays and repeater downlink issues — summary by updatemystuff.com

    Source: icomjapan.com

    Show release notes

    Changes from Version 1.03

    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 Version 1.02 or Version 1.03 firmware.

    Version 1.04 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 uplink.

    To update the firmware

    Thoroughly read 13. UPDATING THE FIRMWARE of the

    ADVANCED MANUAL

    and follow the instruc​tions in it.

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

    The firmware will be updated to the following versions.

    CPU M: 1.04

    S: 1.00

    C: 1.01

    DSP: 1.02

    Release notes & download
  3. Version 1.03 Released Dec 5, 2019 First seen Sep 7, 2026

    Standby beep now sounds immediately when communicating with third-party DV equipment. — summary by updatemystuff.com

    Source: icomjapan.com

    Show release notes

    Changes from Version 1.02

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

    With the latest 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 u​pdate the firmware

    Thoroughly read 13. UPDATING THE FIRMWARE of the

    ADVANCED MANUAL

    and follow the instructions in it.

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

    The firmware will be updated to the following versions.

    CPU M: 1.03

    S: 1.00

    C: 1.01

    DSP: 1.02

    Release notes & download
  4. Version 1.02 Released Nov 6, 2019 First seen Sep 7, 2026

    Fixed data loss issue occurring during DV Fast Data mode communication. — summary by updatemystuff.com

    Source: icomjapan.com

    Show release notes

    Changes from Version 1.01

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

    To update the firmware

    Thoroughly read 13. UPDATING THE FIRMWARE of the

    ADVANCED MANUAL

    and follow the instructions in it.

    Making a backup file of progra​mmed contents and settings before updating the firmware is recommended.

    The firmware will be updated to the following versions.

    CPU M: 1.02

    S: 1.00

    C: 1.01

    DSP: 1.01

    Release notes & download

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