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Schematic of a homebrew receiver and keying

Project for DXers and experimenters alike. An old article publishes by 73 Amateur Radio magazine in PDF format, where all the components required to build your own HF spectrum analyzer may be found in a well-stocked junk box.

A magnetic loop antenna for the VHF band, featuring a high gain that can be compared to a quarter wave vertical antenna

FM & SWL, broadcasting, media, FMDX,frequency lists, ham adio

Ionospheric Data Archived at NGDC

Presents the construction of a 2-meter **Skeleton Slot Yagi** stack, detailing the design process and practical considerations for VHF operation. The author shares insights from building and testing this antenna, emphasizing its performance characteristics for local and extended range contacts. The project outlines the specific dimensions and materials used, providing a clear path for other radio amateurs to replicate or adapt the design for their own stations. The resource covers the unique aspects of the Skeleton Slot radiator, explaining how its geometry contributes to gain and pattern control. It includes discussions on impedance matching and feedline considerations crucial for optimizing power transfer and minimizing SWR. The article draws on real-world testing, offering practical results that validate the theoretical design. This project serves as a valuable reference for those interested in custom VHF antenna solutions.

Experimentig magnetic loop antennas for VHF and HF by M0UKD

An homebrew project of a full wave delta loop antenna for the 40 meters band with dimensione, picture and assembling instructions in Indonesian

Multi band Moxon Yagi Antenna for 10,15,20 meters band with just one feed line. Drawing and project with dimensions

An home made end fed half wave antenna with a tuner box by NG0R

The advantage of 5/8 wave antenna is that it has the lowest angle of radiation and has about 1dB more gain when compared to 1/4 and 1/2 verticals. So the 5/8 should be the favourite choice for DX.

Lot's of vintage radios from 30's

Practival project that contains two isolation transformers, one for AF from the tranciever to the line in on a soundcard, and one from the audio out of the soundcard back to the mic / data input of the radio. Both of which are variable inside the interface via two preset resistors.

Deutscher Amateur-Radio-Club

Modifications to the Tigertronics Signalink USB sound card

Yaesu FT817 all band, all mode handheld transceiver article.

An homebrew audio mixer for the ham shack by GW6ITJ

Radio Strike from sicily

An 80m transceiver using just 14 parts plus crystal and earpiece

A long picture gallery of a homebrew hexbeam antenna project

Home made wire dipole on a lenght of 30 meter 98.4 ft by PE1OPM

A DIY Automatic Band Decoder (ABD) project, designed for dual-radio operation, addresses the common challenge of integrating band data with older transceivers lacking dedicated outputs. This particular build utilizes an AVR AT90S8515 microcontroller and a 16x2 Liquid Crystal Display (LCD) to provide band information, specifically targeting Kenwood rigs via a computer's LPT port. The design aims for cost-effectiveness while maintaining functionality, offering a solution for hams seeking to add automatic band switching capabilities to their station without significant expense. The project outlines the core components required, including the microcontroller, LCD, and an enclosure, noting that the Printed Circuit Board (PCB) fabrication and AVR programming might present challenges for some builders. It details the input requirements, such as a four-pin input and PTT for each radio, along with a 13.8V DC power supply. The decoder provides 2x6 outputs capable of sinking 500mA, suitable for controlling external devices like antenna switches or filters. Despite the original unit being damaged by a lightning strike in 2004, the author confirms its successful operation prior to the incident and mentions plans for a revised version. The resource includes a schematic in PDF format and images of the finished PCB and assembled unit, demonstrating the practical implementation of the design.

An home made FETer QRP transceiver for the 80 meters band

Unaffiliated amateur radio group based in New Castle, Pennsylvania dedicated to having fun on the HF bands

Home build a Kenwood PG-5A cable. This lead is the audio data cable for some of the Kenwood Mobile transceivers

To promote Amateur Radio in the Gadsden - Etowah County area and to provide public service to our community in the form of emergency communications.

The author who works successfully via EME on this band wants to describe his own yagi design and give some of hints for the construction. by Heinrich F. Reckemeyer, DJ9YW

Desgining crystal filters and find out crystal data by measuring it.

Vhf and UHF homebrewers of hardware and antennas. Find help, idea, or someone with just the same interest as you.

Introduction to WSPR beacons. Article describe WSPR2 and WSPR15 beaconing mode and include a frequency reference table for both WSPR modes

SW Radio Africa is the independent voice of Zimbabwe broadcasting on the short wave

DIY beacon for six meters band by K9MU

Trio Datacom, Dolectek and Yaesu Vertex Standard cb and ham radio dealer in new zealand

Solar Panels Grid Tie Systems, Kits, Fountains, Chargers and more

Leader in the development, design, manufacture, marketing and distribution of copper, aluminum and fiber optic wire and cable products for the energy, industrial, specialty and communications markets

A december 2003 QST article to Build a condenser microphone that will perform like the costly commercial units by KT4QW

US amateur radio antenna manufacturer. Produce baluns, delta loops, dipoles, ocf antennas and more

30 meters beacon from UK. QRSS is a method of sending very slow morse code.

10MHz WSPR and QRSS Transmitter Project

This unit uses four capacitors, only two of which are variables, and a single tapped coil. It is built in a die-cast box, and has been tested up to 80W input power on 70MHz by G4CJZ

QSL Printer shop, products include Photo QSL cards, Eyeball cards, and State QSL Cards, based in Hampstead, MD USA

GUI for the KK7KA Wolf software, that was originally written as command line interface only. Wolf is a weak signal software

Homepage of the OS/2 and eComStation enabled Radio Amateurs, the HAM/2s. Reference site for OS/2 ham radio users,

Mullard Radio Astronomy Observatory

A 70 MHz QRP transverter project

This online project guide details the construction of a homebrew boom microphone system. It details the assembly of a microphone shell from a 3/4" PVC pipe section and an end cap, requiring a drilled hole for a snug fit of the electret or condenser mic element. The internal wiring schematic specifies a **2.2 K** resistor and a **47 uF** polar capacitor for signal conditioning, with a circuit diagram provided for integration with IC-706 series transceivers. The guide outlines the use of CAT-5 cable for internal connections, incorporating strain relief at the rear of the mic shell, and an inline 3.5 mm jack to facilitate an external _PTT_ line, designed for a foot-mounted switch. Further construction involves fabricating a microphone shock mount from a 2-inch PVC connector, detailing the creation of four "fingers" and the insertion of screw-eyes for attaching elastic bands, which are twisted 180 degrees for tensioning and vibration isolation. A foam wind screen is also incorporated into the microphone assembly, secured with adhesive. The boom arm itself is repurposed from an articulated architect lamp, with the original lamp assembly converted into a **60 watt** resistive load for testing power sources. Microphone cabling is secured to the boom arm using wire ties, ensuring sufficient slack at hinge points to maintain articulation. The boom base is mounted to a bookshelf, requiring specific positioning to achieve proper microphone placement in front of the operator. Performance evaluation of the microphone system is conducted through on-air audio signal reports from other amateur radio operators. DXZone Focus: Online Project Guide | Boom Microphone Construction | Electret Mic Element | PTT Line

This circuit is very simple and has a fantastic range of potential uses.

A 50 MHz homemade RF spectrum analyzer

Caig labs - featuring advanced contact cleaners deoxit, deoxit gold (progold) and deoxit faderlube (cailube mcl) for manufacturing, maintenance and service.