Showing posts with label D-star. Show all posts
Showing posts with label D-star. Show all posts

Friday, June 13, 2025

Icom IC-705 HF/VHF/UHF All Mode Portable QRP 5W/10W Transceiver – A Full In-Depth Review


The Icom IC-705 is a game-changer in the world of portable ham radios. Designed for amateur radio operators who want an all-in-one, travel-friendly transceiver without sacrificing performance or features, the IC-705 is a highly compact and sophisticated rig that brings together the best of Icom's technology into a lightweight and versatile package. Covering HF, VHF, and UHF bands with all-mode operation—including SSB, CW, RTTY, AM, FM, and D-STAR digital voice—the IC-705 is ideal for portable, QRP, and even base station use in a pinch.

Design and Build Quality

Right out of the box, the IC-705 impresses with its robust and polished design. It’s compact enough to fit in one hand but feels incredibly sturdy. The transceiver weighs approximately 2.4 pounds (1.1 kg), making it a comfortable companion for field operations, SOTA (Summits on the Air), and POTA (Parks on the Air). The build is dominated by a large 4.3-inch color touchscreen display which serves as the centerpiece for user interaction.

The layout of controls is clean and intuitive. The front panel sports a combination of physical buttons and knobs, augmented by the touchscreen, providing a user-friendly interface that blends traditional and modern controls. The top and side panels house connections for antenna, microphone, power, and accessories, all well-marked and easily accessible.

Band Coverage and Power Output

The IC-705 offers wideband receive coverage from 0.030 to 144 MHz and 430–450 MHz, allowing users to monitor a broad spectrum of frequencies. On transmit, the radio covers the amateur bands on HF (160 to 10 meters), VHF (2 meters), and UHF (70 centimeters). Power output is selectable between 0.5W to 5W on internal battery and up to 10W when using an external 13.8V power supply. This makes it perfect for QRP enthusiasts while still providing enough punch for solid contacts in favorable conditions.

Despite being a QRP radio, the IC-705 performs remarkably well in signal strength and clarity. It utilizes Icom's RF direct sampling system for HF and IF sampling for VHF/UHF, minimizing signal loss and maximizing efficiency. The receiver is sensitive, with low noise, and capable of handling crowded band conditions with ease.

Display and Interface

The large color touchscreen is a standout feature of the IC-705. It offers vibrant visuals, quick response times, and easy navigation. Touch access to frequency settings, menus, and scope features adds a layer of convenience that is rarely found in portable rigs. The real-time spectrum scope and waterfall display provide a clear, high-resolution view of band activity, which is invaluable during portable operations.

The screen also displays SWR, power output, voltage, and a wide array of operational parameters, making it easy to monitor performance in the field. Menu navigation is logical and organized, and once a user becomes familiar with the system, adjustments can be made quickly and accurately.

Connectivity and Features

The IC-705 is loaded with connectivity options. It includes built-in Wi-Fi, Bluetooth, GPS, and a microSD card slot. The Wi-Fi feature allows for remote operation via Icom’s RS-BA1 app, and the Bluetooth can be used for wireless headsets and audio accessories. The built-in GPS enables automatic grid locator updates and location stamping for logs.

Another welcome inclusion is the USB-C port, which handles data communication, audio, and even power, making it compatible with modern computing equipment and simplifying digital mode operation. The radio is compatible with a wide array of digital modes such as FT8, PSK31, and RTTY when connected to a computer.

Battery and Portability

The IC-705 comes with the BP-272 Li-ion battery pack, which is also used in Icom’s handheld radios. While this is a convenient option, the battery life depends heavily on usage. Operating with full screen brightness and high transmit rates will drain the battery faster than expected, but under average portable operation, the battery holds up respectably.

Field operators will likely want to bring extra battery packs or use an external power supply to extend operation time. Despite this, the portability of the IC-705 makes it a preferred option for those who enjoy operating from remote locations.

Audio and Performance

The IC-705 delivers excellent audio quality both on transmit and receive. The internal speaker produces clear and loud sound, even in outdoor conditions. For those who want higher fidelity or need to operate discreetly, a headphone jack and Bluetooth audio compatibility are available.

On-air reports often highlight the clarity and punch of the transmitted audio. The built-in microphone is good, but Icom also offers optional mics for those wanting different configurations. The combination of clean transmission, sensitive reception, and advanced DSP filtering ensures strong performance even under challenging band conditions.

Logging and SDR Capabilities

Another feature worth highlighting is the SDR-like performance of the IC-705. With its direct sampling receiver and comprehensive real-time band scope, the radio mimics many of the capabilities found in full-size SDR transceivers. This is especially useful for those who are serious about monitoring multiple signals, spotting weak signals, and adjusting operating strategies in real-time.

Logging is made easier with the internal GPS and the ability to store logs on a microSD card. This helps simplify post-operation analysis or uploading to digital logging platforms.

Final Thoughts

The Icom IC-705 is a near-perfect companion for the modern ham radio operator who values portability, versatility, and technology. While it does come with a premium price tag, it more than justifies the cost with its wealth of features, performance capabilities, and cutting-edge technology packed into a compact chassis.

Whether used for portable QRP operations, base station backup, digital modes, or simply casual listening across the bands, the IC-705 stands out as a top-tier transceiver. It bridges the gap between handheld convenience and desktop functionality, making it one of the most innovative and desirable radios in the amateur radio market today.

See The Icom IC-705 On Amazon!

Sunday, December 1, 2024

In-Depth Review of the Icom IC-7100 HF/50/144/440 MHz Amateur Radio Transceiver


The Icom IC-7100 is a versatile, feature-rich amateur radio transceiver that combines modern design, robust functionality, and the convenience of digital modes like D-STAR. As a mobile HF/50/144/440 MHz unit, the IC-7100 caters to operators who value flexibility and advanced communication options. This review explores its key features, usability, performance, and overall value.


Key Features

  1. Frequency Coverage

    • Covers HF, 6m (50 MHz), 2m (144 MHz), and 70cm (440 MHz), offering a broad spectrum of operating bands.
    • Supports all major modes, including SSB, CW, AM, FM, RTTY, and D-STAR.
  2. Touch-Screen Interface

    • A monochrome resistive touch screen facilitates intuitive navigation through menus.
    • Includes physical buttons for frequently used functions, balancing touchscreen convenience with tactile feedback.
  3. D-STAR Integration

    • Offers native support for D-STAR digital voice and data communications.
    • Seamless operation on D-STAR repeaters and gateways, with support for features like DR (D-STAR Repeater) mode for quick configuration.
  4. Compact, Remote-Mount Design

    • Features a separate control head and main unit for flexible installation in mobile setups.
    • The control head is slim and angled, making it ideal for mounting in vehicles or small operating spaces.
  5. Built-In DSP

  6. 50 Watts Output Power

    • Delivers up to 100 watts on HF and 50 MHz, and 50 watts on 2m and 70cm.
    • Provides ample power for most mobile and base station operations.
  7. USB Connectivity

    • Built-in USB port supports direct computer connection for digital modes, rig control, and firmware updates.
    • No external sound card interface is required, simplifying digital operation setup.
  8. SD Card Slot

    • Allows for storage of configuration settings, D-STAR repeater information, and logs, enhancing portability and convenience.

Design and Usability

  • Control Head Design

    • The angled control head provides excellent visibility when mounted on a dashboard or desk. The screen is legible, even in bright lighting conditions, but the lack of a color display may feel dated compared to other modern transceivers.
  • User Interface

    • The touch screen simplifies menu navigation, though it requires a firmer press compared to modern capacitive touch screens. This design is robust but may take some getting used to.
  • Portability

    • The separation of the control head and main body allows for discrete installation in vehicles, with only the control head requiring dashboard space.

Performance

  1. Receiver Sensitivity and Selectivity

    • The IC-7100 boasts excellent receiver sensitivity, capable of pulling in weak signals on crowded bands.
    • DSP features like adjustable IF filtering, noise reduction, and twin PBT (Pass Band Tuning) enhance selectivity.
  2. Transmitter Performance

    • Solid transmit audio quality, with the included HM-198 hand microphone providing clear and natural audio.
    • Consistent output power across bands ensures reliable communication.
  3. Digital Modes and D-STAR

    • D-STAR operation is smooth, with DR mode making repeater configuration straightforward. The IC-7100 supports both voice and data communication over D-STAR.
  4. Mobile Operation

    • Performs well as a mobile rig, with minimal signal drift even under vehicle motion.
    • The remote-mount option and ease of powering from a 12V system make it ideal for on-the-go use.

Strengths

  • Broad frequency coverage and multi-mode operation.
  • Built-in DSP and D-STAR support.
  • Touchscreen interface simplifies complex menu navigation.
  • Compact and versatile design for mobile and base use.
  • Integrated USB port reduces the need for additional interfaces.
  • Good value for a radio with such a broad feature set.

Drawbacks

  • Monochrome screen may feel outdated compared to color displays on other transceivers.
  • Resistive touchscreen requires deliberate input, which some users might find less responsive.
  • No built-in antenna tuner; external tuner required for non-resonant antennas.
  • Limited memory slots for saving frequency presets compared to some competitors.

Overall Value

The Icom IC-7100 is an excellent choice for amateur radio operators who prioritize versatility, advanced digital features, and a compact design. While it lacks some modern luxuries like a color display, its performance and functionality outweigh these minor drawbacks. The inclusion of D-STAR, robust DSP, and all-band coverage make it a future-proof investment for both mobile and base station use.

At its price point, the IC-7100 offers tremendous value, making it a strong contender for amateurs seeking a reliable, feature-packed transceiver.


Who Should Buy It?

  • Mobile operators who need a compact, remote-mount transceiver.
  • Amateur radio enthusiasts looking to explore D-STAR and digital modes.
  • Multi-band/multi-mode users who want an all-in-one solution.

Rating: 4.5/5

The IC-7100 is a well-rounded transceiver that balances modern features with a straightforward, reliable design. Despite a few minor shortcomings, it remains a popular and respected choice in the amateur radio community.

Find The Icom 7100 On Amazon!

Kenwood TS-890S 100W HF/50MHz Transceiver with Advanced DSP – In-Depth Review

The Kenwood TS-890S is a high-end HF/50MHz transceiver designed for serious amateur radio operators who demand professional-grade perform...

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