QRP Silent Antenna Tuning Unit with Built-in Noise Bridge

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This innovative antenna tuning unit (ATU) enables QRP operators to match their antennas without transmitting RF signals. Using a noise bridge technique instead of traditional transmit-and-tune methods, it achieves truly silent operation. The design incorporates an L-match network with switched inductors and variable capacitor, handling impedance matching from 3-30MHz. Operating from a 9V battery, it includes a built-in RF power meter and dummy load for QRP transmitter testing. The compact unit is particularly suitable for portable operations where minimal RF emissions during tuning are desired.

More Information - https://www.dxzone.com/dx36251/qrp-silent-antenna-tuning-unit-with-built-in-noise-bridge.html

Yaesu, Icom & Kenwood Feature New Transceivers at Ham Fair Japan

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The big three amateur radio transceiver manufacturers each featured new transceivers at Ham Fair in Japan this past week. Yaesu revealed the FTX-1F, a portable radio designed to compete with the Icom IC-705. Icom announced the IC-7760, a "Shack Style" transceiver with separate base and dual display panel. Kenwood revealed a yet to be named mobile rig capable of both APRS and DSTAR.

Yaesu FTX-1F

  • Portable

  • SDR transceiver

  • Covers HF - 430MHz

  • FT-818ND successor

  • Supports C4FM

  • 6W battery, 10W external power

Icom IC-7760

  • 200 W HF/50 MHz amateur transceiver

  • "innovative Shack Style" consisting a full control head with separate RF deck

  • In-house remote operation through a wired LAN

  • Two displays, 7-inch wide and 2.4-inch

  • Touch screen operation

Kenwood Mobile Radio

  • Dual receive

  • Separate display, base units

  • GPS receiver

  • APRS support

  • DSTAR support

  • USB-C port

  • SD card port

First M17 Based Radios Begin Shipping

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Connect Systems has begun shipping the first radios that operate M17 "out of the box." The M17 project is an Open Source digital mode alternative to modes such as DSTAR and System Fusion which rely on proprietary encoding and decoding hardware and software.

The CS7000 M17 is an HT transceiver running M17 described as "4FSK modulation with an open source Protocol and Vocoder." A "PLUS" version of the HT with additional memory and processing power will also be available.

See more information about the M17 Project.

M17 Users Group - https://daily.hamweekly.com/2024/07/first-m17-radios-are-shipping/