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VHF/UHF FM Mobile Transceiver with APRS and EchoLink Functionality official Kenwood UK site

A Java multiplatform application used to find EEPROM locations for different radio settings. a very simple to use multi-platform Java application which can be used to find EEPROM locations for different transceiver settings. This information can then be used to send the right CAT commands to configure the radio remotely. Use this application on your own risk.

A 144 MHz transverter made by ur3lmz and connected to and Elecraft KX2 transceiver

Remote Ham Radio via WebRTC Audio Raspberry Pi 3. Stream Transceiver Audio to and from the remote station though a Browser using WebRTC.

Reivews of the Icom IC 7100 HF VHF UHF transceiver

FTB7800 is a memory management software program for the Yaesu FT-7800R/E FM transceiver

The Baofeng UV-5R handheld transceiver, introduced around 2012, operates across the 2-meter (144-148 MHz) and 70-centimeter (420-450 MHz) amateur bands, offering dual-band receive and transmit capabilities. This review provides an early assessment of the radio's form factor, user interface, and general performance, noting its compact size and the inclusion of a **VFO/Memory mode** button for frequency management. The device supports both FM and narrow FM modes, with a reported power output of 4 watts on VHF and 3 watts on UHF, making it suitable for local simplex and repeater operations. Key features discussed include its 128-channel memory capacity, a built-in VOX function, and a **DTMF keypad** for tone dialing and repeater access. The review highlights the radio's ability to scan frequencies and memories, along with a dual-watch function allowing simultaneous monitoring of two frequencies. Battery life is addressed, with the standard 1800 mAh Li-ion pack providing several hours of operation depending on transmit usage. Initial impressions cover the radio's construction and the clarity of its LCD display, which shows both A and B band frequencies.

Gimme Five reloaded, a compact 5 band QRP SSB transceiver in SMD technology. This unit covers 5 bands within the amateur radio spectrum (3.5, 7, 14, 21 and 28 MHz). Receiver is a single conversion unit with an interfrequency of 9 MHz. Transmitter uses 5 stages and has got a power level of 10 watts PEP output.

The official announcement of the Icom IC-7610 mid class amateur radio transceiver

A 30 Meter, Discrete Component CW Transceiver Built Manhattan-style

An interesting review of the Icom 2720H VHF UHF amateur radio mobile transceiver with pros and cons

The QCX 5W CW Transceiver From QRP Labs, a detailed article describing from the unboxing of the component to the final assembly of the CW QRP Transceiver

A review of the Chinese version of uSDX USDR HF QRP Transceiver. Author made an extensive review of receiver and transmitter features.

Download the latest firmware for the tyt md-380 VHF transceiver

A review of the baofeng dualband handheld transceiver

Large picture and specifications of popular VHF UHF kenwood amateur radio transceiver

This article documents the author's latest go-box build for outdoor ham radio operations using a Yaesu FT-891 transceiver. The go-box is constructed from a plastic "50-cal ammo case" and contains various components, including the transceiver, LDG Z11 Pro autotuner, DIY Yaesu FH-2 remote control keypad, and an external battery. The author details the design considerations, the mounting of components inside the box, and addresses issues related to ventilation and cable management. The go-box is geared for CW operations and POTA activations, with further modifications planned for a microphone and DATA jack. This project allows for rugged, environmentally protected outdoor radio operations while maintaining portability.

Omega Radio is a Polish manufacturer of the QRP portable OMEGA+ transceiver.

FTB2800 is a memory management software program for the Yaesu FT 2800 M FM transceiver.

The ICOM IC 7600 transceiver as successor of the IC 756 Pro3, resource page with many links and resources to the Icom top line HF transceiver

The project in this article illustrates how to do this in a simple and low cost way so that you can easily access the microwave bands using the existing HF or HF/VHF transceiver as IF.

Adapting a common PC earphone with microphone to connect to a transceiver via a homemade pre-amplifier, using a simple chip with aprox 10 db gain. Includes a schematic diagram

Exaustive review of the self-contained, top-performance HF/6m transceiver Icom IC-7700

Complete microphone wiring handbook for most popular radio transceivers provided by Astatic Microphones.

A review of the Wouxun VHF UHF handheld transceiver KG-UV8D

Remote SDR is a web application allowing to remotely control an amateur radio transceiver between 1 MHz and 6 GHZ. It allows processing of Adalm-Pluto SDR in addition to HackRF or RTL-SD Reception in NBFM, WBFM, AM in addition to SSB Transmission in NBFM or SSB and more

The XV4-10 is a linear transverter for the 4m band to be used with a 10m transceiver. Input frequency 29-30 MHz, output frequency 69.5-70.5 MHz

Voldatech, a manufacturer based in China, produces a range of RF feeder cables and site components essential for amateur radio installations and telecommunication infrastructure. Their product line includes various types of coaxial cables, such as **50 Ohm** and 75 Ohm options, along with a comprehensive selection of connectors like N-type, UHF, and BNC. These components are critical for maintaining signal integrity and minimizing loss in antenna systems, whether for a home shack or a remote DXpedition setup. The company's focus on _RF Coax cables_ and connectors directly supports the needs of radio amateurs seeking reliable transmission lines for their transceivers and antennas. Amateurs often compare Voldatech's offerings to established brands, evaluating factors such as impedance matching, shielding effectiveness, and durability under various environmental conditions. The availability of diverse cable types allows operators to select optimal solutions for different frequency bands and power levels, from QRP to high-power amplifier setups. Their products are particularly relevant for those constructing new antenna arrays or upgrading existing feedline systems, aiming to achieve maximum power transfer and reduce standing wave ratio (SWR) for efficient signal propagation.

AC7GZ/B is a converted Sharp CB-2460 Citizens Band transceiver operatin on 28.2118 MHz.

DK7IH QRP transceiver for 14 MHz. This small and compact home made transceiver with a max power output of 5W, the VFO module is based on the clock oscillator chip Si5351A by Silicon Labs ATmega168 and OLED 1306

Mini-Operating Guide includes useful hints on Using the HM-133 Microphone, Basic Operation, Operating through a Repeater, Programming a Memory Channel and Assigning a Memory Channel to a Memory Bank

The ARRL's End-Fed Half-Wave (EFHW) Antenna Kit is an easy-to-build four-band antenna designed for 10, 15, 20, and 40 meters. Ideal for portable operations, it includes a 49:1 impedance transformer for compatibility with most transceivers. This project, detailed with step-by-step assembly instructions, involves creating a weatherproof enclosure and impedance matching network. The kit simplifies HF operations and supports multiple configurations, making it a versatile tool for amateur radio opertors.

A review of the Yaesu FT-8900r 29/50/144/430 MHz FM Transceiver, providing 50 Watts of power output on the 29/50/144 MHz Amateur bands, and 35 Watts on the 430 MHz band.

Although most Preselectors are designed with an internal T/R relay, theoretically enabling direct insertion between the transceiver and the antenna, there is a problem when running CW, especially when running full QSK. The switching time of the internal relay is too slow to follow full QSK. The best way to avoid this problem altogether is to insert the Preselector directly into the transceiver’s RX antenna line, thus avoiding entirely the need to switch the Preselector in and out.

Successor to the Metamorserino, this is a multi-functional Morse code machine (Keyer, Generator, Trainer) that includes also a transceiver using LoRa on the 70cm band.

When operating contest in a multi transceiver environment interferences between the 40m and 20m are guaranteed. An easy and inexpensive way to reduce interferences is to add coax stub filters

Presents various amateur radio topics through blog posts, detailing operational experiences and technical insights from the perspective of SV2YC. The content frequently discusses antenna projects, such as a **portable 20m/40m dipole** designed for rapid deployment, and explores the performance characteristics of different wire configurations in varied field conditions. Observations on propagation and band activity across the HF spectrum are also regularly documented, providing practical context for fellow operators. Specific entries often include detailed accounts of **DX contacts** and participation in minor contests, outlining station setup, power levels, and antenna choices. The blog also covers modifications to commercial transceivers and homebrew accessory construction, offering practical advice on improving station efficiency and functionality. Further posts delve into software applications for logging and digital modes, sharing configurations and operational tips for maximizing their utility in daily amateur radio activities.

Amateur radio repeaters, often designated by an "R" number like _R6_ or _R5_, serve as crucial infrastructure for extending VHF/UHF communications range. This resource from Essex Ham explains the fundamental concept of a repeater, detailing how it receives on one frequency and simultaneously retransmits on another, typically with a 600 kHz offset for 2-meter repeaters. Understanding the input and output frequencies, along with the required CTCSS tone, is essential for successful access, ensuring your signal is processed and relayed across a wider service area. The article clarifies the importance of using the correct _CTCSS_ (Continuous Tone-Coded Squelch System) tone, often referred to as a sub-audible tone, to activate a specific repeater. It also touches upon the concept of _simplex_ operation versus repeater use, highlighting the benefits of repeaters for mobile and handheld transceivers. Proper operating procedures, such as listening before transmitting and keeping transmissions concise, are emphasized to maintain good amateur practice on shared repeater assets.

Learn how to build a QRP digital transceiver with Arduino, based on a project by Burkhard Kainka. This article covers the development process, including the source code, modifications made, and the addition of an OLED display for a more professional look. Discover the inner workings of the transceiver, from the receiver to the oscillator, and how components like the CD2003 are utilized. Explore the schematic design, the use of a PLL module Si5351A controlled by Arduino nano, and more. Ideal for hams looking to create their own digital transceiver for amateur radio operations.

Mitigating impulse-type noise, a common challenge in the **HF radio spectrum**, often requires specialized processing before the signal reaches the transceiver's receiver stages. The NR-1 addresses this by functioning as an RF interference removal device, specifically a noise blanker, targeting transient noise sources. Its operational range extends from 1.6 MHz to beyond 70 MHz, making it suitable for various amateur radio bands and general shortwave listening applications. Unlike QRM eliminators or X-phasers, the NR-1 does not require a separate noise antenna for its operation, simplifying its integration into existing station setups. The device's design focuses on wideband performance, allowing its use both within and outside the allocated amateur radio frequencies. Documentation detailing its operation is available, providing insights into its technical specifications and deployment. This unit is a hardware product, conceptualized and implemented by SV3ORA.

A very small receiver converter that can be plugged to the backside of the battery powered portable transceiver FT817 from Yaesu. A high performance receiver for 2.3GHz amateur radio signal

Elecraft new QRP transceiver, an 80-10 m SSB/CW/Data station that fits in your pocket

A web site deticated to the Kenwood TS-590 transceiver with links to software downloads fot the 590s seriend and technical documentation in Russian.

A lean design SSB-Transceiver for 14 MHz, Simple SSB Transceiver for 14MHz VFO controlled, 5W PEP

Schematic diagram circuit to build a RS232 serial interface for the Yaesu FT 1000D, works also as CW Keyer control with Log-EQF software. May be used with other Yaesu HF Transceivers.

A review of the dual band FT-8800R transceiver by the jeep expedition group

A pocket-sized homebrew 40m CW QRPp/QRP transceiver

The Icom IC-7300 is a popular SDR transceiver known for its excellent performance in ham bands. However, users have reported issues with reception reliability outside these bands due to ADC aliasing. This phenomenon occurs when the sampling rate of the radio interacts with frequencies outside the intended range, leading to unwanted signals being received. For instance, when tuned between 30 to 36 MHz, users may inadvertently pick up WFM broadcast signals or PMR communications due to aliasing effects. This guide outlines modifications to improve the IC-7300's performance by addressing the low-pass filter design, which is crucial for reducing interference from these unwanted signals. The proposed modifications involve adjusting the low-pass filter on the PA unit to better attenuate frequencies that cause aliasing. Measurements indicate that the original filter design allows significant signal leakage, leading to false receptions. By implementing the suggested changes, users can achieve a notable reduction in unwanted signals, enhancing the overall functionality of the IC-7300. While the modification requires careful soldering, the benefits in performance make it a worthwhile endeavor for serious operators looking to optimize their SDR experience.

Yaesu FT-450D HF / 6 Meter DSP Transceiver, a nice affordable transceiver for amateur radio use, but understand the caveats.

Malcom Technical Support Radio Electronics Repair, ICOM Authorized Service Center, also service 1988 and newer Kenwood HF/VHF/UHF transceivers based in Toledo, WA USA