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eHam reviews of the Yaesu FTDX-3000 HF Class line transsceiver bu Yaesu

What is VSWR and why you should care, formal definition of VSWR and SeaSonde Measurements, formulas

A Rig control CAT interface schematic suitable for both the Yaesu FT-817 and FT-100 transceivers.

From 1921 to 1924, radio amateurs experimented with transmitting across the Atlantic. Everyday Engineering magazine organized the first sending test with English amateurs prepared to listen for signals from the US

This paper discusses the sources of feed line currents and the methods used to control them.

Review of the popular Icom IC-2100 VHF ham radio transceiver by YB3TD

A prototype of a switch foot made on a square aluminium stock frame

eHam reviews of the popular HF Transceiver Drake TR7

eHam Reviews for Elecraft K3

Array Solutions AIM 4170 Antenna Impedance Meter, QST Review

An inexpensive portable radio that you can travel with. ATS-505 would be a good choice for a first-time purchaser of a shortwave radio.

Times Technologies Vector Impedance Analyzer Review

The MD-2017 is a dual band DMR and Analog handheld transceiver with a frequency range on VHF 136-174 MHz and on UHF 400-480 MHz

The ICOM IC-R72E a neat compact communications receiver. Coverage: LW, MW, SW (0.1- 30.0 MHz continuous) discontinued in 1998

Reviews of Acom 1010 KW 160 - 10 m PA at eham.net

The ICOM IC-7600 is an improved version of the IC-756 Pro and Pro II review by N9EWO

Yaesu FT-7800R dual band 2m/440Mhz mobile radio review

This project details the construction and testing of a M0PLK Delta Loop antenna for the 20-10m ham radio bands. Inspired by positive reviews highlighting its reduced local QRM compared to Cobweb antennas, the author built the antenna using aluminum tubes, DX-Wire FS2 wire, and a 1:4 balun. A mix of custom 3D-printed parts and careful assembly ensured stability and performance. Initial VSWR measurements met expectations, and test QSOs demonstrated success across multiple bands. Future enhancements include adding a lightweight, remote-controlled rotator for directional capabilities.

Presents the official results for the _CQ World Wide 160-Meter Contest_, a premier event for Top Band enthusiasts. The resource details final scores for both CW and SSB segments, offering links to comprehensive articles, plaque winner lists, and club score breakdowns. It also includes access to score databases for individual modes and years, along with "Soapbox/QRM Comments" from participants, providing insights into operating conditions and experiences. This archive spans results from 2010 through 2025, with a forward-looking note regarding the 2026 SSB contest date adjustment due to a conflict with the _ARRL DX CW Contest_. The site provides specific links for each year, allowing operators to review detailed outcomes, including top scores, errata, and all-time records, such as the _SX5R_ 2017 SSB performance. The structured presentation facilitates easy navigation through historical contest data.

Kenwood TM D710A reviews at eham.net

Amateur / HAM / CB Radio Resources and Information including reviews, projects, licensing and FCC Enforcement.

Reivews of the Icom IC 7100 HF VHF UHF transceiver

If you thought you knew everything about balun performance characteristics, there is an important figure of merit you may have neglected

Internal Bluetooth interface for miniVNA, Bluetooth connection to the PC allow Full cordless operation with ao external components

A short description of Baofeng UV-5R by NH7QH

Thsi article describes a microcontroller driven semi-automatic antenna tuner capable of handling power levels up to 150 watts. The device is a low pass filter tuner manually tuned by setting the optimized L/C combination by hand and then storing the values into the EEPROM of the mictrocontroller to recall them later (seperately for each band from 80 to 10 meters including WARC bands)

A complete review of the Ten-Tec RX340 all mode HF receiver

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

A review of the MFJ-259B Antenna Analyser writtten by G3CWI

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

A review of the baofeng dualband handheld transceiver

A detailed review of the Icom IC-R75 30 kHz -6 0 MHz Receiver first introduced in 1999

This is a synopsis of a talk presented to the Sydney VHF DX GROUP by VK2ZAB on how, when and why is convenient to build a Yagi antenna stack.

Article on operating aids and band usage during solar minimun periods. Author tries to explain what can we expect on the HF bands during a solar minimum period and which approach to be used to understand band openings.

Guide to the Yaseu VX5r, Modes, Memory Banks, Buttons, SET commands, How to save a memory, Tricks and Memory Channel Listing

Eham user reviews for Radio Shack PRO-94 1000 channel Dual Trunking Scanner

A 18 elements Yagi antenna for 432/435 MHz as published on 2011 CQ VHF magazine

Schematic drawing and instructions for the construction of a simple portable dipole for use in low power and portable operations

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

A rotary dipole antenna for 30 meters band. Each arm is about 12.5 ft and is constructed from telescoping fibreglass flag/fishing poles and short lengths of aluminium tubing. Two short lengths of glass-fibre rod were used to insulate the arms from the supporting hardware.

With my present QTH a beam antenna is no option, but I wanted a multiband antenna which covered as many bands as possible. After some investigations I decided to put my money in the Cushcraft R-8.

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

PSK Reporter,is a powerful tool for monitoring your FT8, JT65 or PSK signals around the world. But, even if you are not transmitting on any of these modes it can still be a great propagation tool for determining which bands are open and to where in the world signals from your area are being heard.

This resource provides a historical analysis of amateur radio call sign assignment policies in the United States, detailing regulatory shifts from the Department of Commerce to the Federal Radio Commission (FRC) and subsequently the Federal Communications Commission (FCC). It documents the evolution of call sign issuance, from early reissuance practices in the 1920s to the implementation of the Group Call Sign Assignment System on March 24, 1978. This system categorized call signs (e.g., 1x2, 2x1, 1x3, 2x3 formats) into groups A, B, C, and D, correlating with license classes such as Extra, Advanced, General, and Novice, and specifying prefixes for contiguous U.S. and territorial areas (e.g., _AH_, _KP_, _KL_). The document further details the legislative process leading to the modern Vanity Call Sign program, initiated by a petition in June 1990 and formalized by the Omnibus Budget Reconciliation Act of August 10, 1993. It outlines the FCC's adoption of final rules on December 23, 1994, and the subsequent fee structure, with the first vanity call sign issued on May 31, 1996, at a cost of **$30.00** for a ten-year term. The ARRL's proposed "starting gates" implementation strategy is also described, which phased in eligibility for vanity call signs based on license class and prior holder status. DXZone Focus: Historical Document | Regulatory Analysis | Call Sign Formats | Fee Structure

This is a compact three transistor regenerative general coverage receiver with fixed feedback. The sensitivity and selectivity is relative good, especially on the LF and MW bands, as can be expected with this simple design.

Icom PW-1 1kw Linear Amplifier described by WA0SXV

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

Presentation of the QO-100 the first geostationary OSCAR from Qatar by AMSAT-DL

A review of the Alpha 87-A power amplifier by WD0M

Eham users review of Radio Shack PRO-95