Icom HM-198 Hand Microphone for IC-7100 / ID-5100A / IC-2730A Series
The HM-198 is the OEM hand microphone for the Icom IC-7100 HF/VHF/UHF all-mode transceiver. It uses a modular connector, weighs 168 g with a 490 mm coiled cable, and features a dust-tight PTT switch with Up/Down channel buttons. For ID-5100A, ID-4100A, and IC-2730A installations, the HM-198 requires the OPC-647 or OPC-440 microphone extension cable (sold separately).
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Why Professionals Choose the Icom Hand Mic HM-198
The IC-7100 is a compact HF/VHF/UHF all-mode transceiver used in fixed base stations, mobile installations, and emergency communications setups. The original hand microphone fails over time through PTT switch wear, connector damage, or cable fatigue at the stress point near the connector housing - common failure modes in daily-use installations. The HM-198 is the direct OEM replacement, built to the same specification as the microphone supplied with the IC-7100 from the factory.
The dust-tight PTT switch handles the switching action in environments where fine particulate - workshop dust, vehicle interior debris, field conditions — would work into a standard switch and cause intermittent contact. The Up/Down buttons allow channel or frequency stepping directly from the microphone without reaching for the radio panel, which matters in mobile installations where the radio is mounted out of easy reach. The 490 mm coiled cable provides enough reach for dash-mounted or remote-head IC-7100 setups without excess cable cluttering the operating position.
For ID-5100A, ID-4100A, and IC-2730A mobile transceivers, the HM-198 connects via the OPC-647 or OPC-440 microphone extension cable. Both are sold separately. The HM-198 connector is a standard modular plug — physically it mates with these radios through the extension cable, giving operators a consistent hand microphone across a multi-radio installation.
Third-party replacement microphones for the IC-7100 use the same modular connector but differ in PTT switch actuation force, button layout, and cable termination quality. The HM-198 is the original Icom part, matched to the IC-7100's microphone gain and impedance settings.
AXDIGITAL is an authorized Icom dealer supplying OEM accessories for amateur, commercial, and mobile radio installations across the US.
Specification
Audio — Hand Microphone HM-198
| Type | Hand Microphone |
| Connector Type | Modular connector (8-pin modular, RJ45) |
| Cable Length | 490mm / 19.3 in (when curled) |
| Weight | 168g / 5.93oz |
| PTT Switch | Dust-tight |
| Controls | PTT, Up / Down buttons |
| Waterproof | N/A |
| Compatible Models | IC-7100 (direct); ID-5100A, ID-4100A, IC-2730A |
FAQ
Is the HM-198 compatible with the Icom ID-5100A and IC-2730A directly?
The HM-198 connects directly to the IC-7100. For the ID-5100A, ID-4100A, and IC-2730A, the HM-198 requires either the OPC-647 or OPC-440 microphone extension cable — sold separately. Both extension cables are listed by Icom as the connecting accessory for these radio models. Contact our team to confirm which extension cable applies to your specific radio variant before ordering.
Is the HM-198 the same microphone supplied with the IC-7100 from the factory?
Yes. The HM-198 is the OEM hand microphone supplied with the IC-7100 and is the direct factory replacement. It matches the IC-7100's microphone input specification — connector pinout, gain level, and PTT switch wiring. If the original microphone has failed or been damaged, the HM-198 restores the radio to factory configuration without requiring any adjustment to audio settings.
