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Onine Log for 9J2T DX Pedition

Satellite Tracking/Orbital Prediction Program an open-source, multi-user satellite tracking and orbital prediction program written under the Linux operating system by John A. Magliacane, KD2BD. PREDICT is free software

Long Waves, Short Antennas, designing antennas for MF and LF communications

Proppy: Online HF propagation predictions using the ITU Recommendation P.533-13 Propagation Prediction Application.

GitHub reposotory of QradioPredict, a radio propagation prediction tool for VHF-UHF, based on the Irregular Terrain Model, also known as Longley-Rice. Can be used as a repeater site planing tool. Has an internal APRS client which can be used to display stations as a landmark.

An 87ft inverted L portable antenna working on 80 40 30 20 15 meters band

This is from a posting on the BARK PBBS Keith, WB2VUO

The half wave dipole antenna is a simple and practical antenna model that consists of a half wavelength long centre fed conductor.

K9AY receiving antennas for PA6Z made by PA9M

An homebrew crossed Yagi antenna for two meters band based on DK72B design with pictures, detailed description and tricks by Barry Zarucki M0DGQ

Definition of antenna gain at wikipedia

A vertical dipole for 10, 15, 20 and 40 meters made adapting two Hustler Model 6-BTV antennas by w6sdo

Active filter design software for windows, AktivFilter 3 for the design of active filters tuned on the opamp type.

A restored version of the original CQ DX Zones of the world

Yet another G5RV antenna plan to build a G5RV Antenna for 80 to 10 meters usage

Project plan for a 4 element yagi beam for 50 Mhz

A copper pipe Hentenna for 144 MHz. The Hentenna, a compact, high-gain loop antenna developed in Japan in the 1970s, offers approximately 5.1 dBd gain, comparable to a three-element Yagi. Adapted for 2 meters, it is crafted from copper pipe for simplicity, affordability, and broadband performance. Requiring no feed-point tuning, its construction involves soldering standard copper fittings. Installation demands non-conductive materials to minimize signal disruption. Versatile for vertical or horizontal polarization, it is ideal for FM, repeater, SSB, or CW applications. This design emphasizes practicality and performance for amateur radio enthusiasts

Recordings of shortwave numbers stations

Article on PC to radio interfacing by Paul Umbdenstock, WA1VOA

Freeware windows program by VE3NEA that allow to view and edit the Master Callsign Database file used in many contesting programs, import and export callsigns, auto-download announced DX operations.

The sun can power your Ham station and a whole lot more. Using solar power panel with a 12 volt battery can permit you to operate autonomously even for several hours without interruption.

A 2,4 GHz 13cm band quadrible qiad antenna with reflector offering a 14dbd gain

HX-B5i five band HexBeam installation

An easy method for erecting antenna masts using readily available material

List of latest published Weather Fax world wide schedule including frequencies and modes.

A vertical portable antenna system by W0SJS that will work on 40, 30, 20, 17 and 15 meters

YO Yagi Optimizer by K6STI is an old MSDOS based antenna modelling software that has been very popular among ham radio community. YO.exe is still today used to optimize Yagi Antennas.

Antenna mounting height, the higher the better? Learn how radiation pattern change, and decide if you need an higher or a lower angle for your dx needs.

There is considerable confusion as to what exactly a multiband vertical antenna is. The confusion concerns the method of feed, how much mismatch one can expect, how many radials are required, how the particular antenna is built for multiband use, plus some other points.

A very short dipole with a good radiation efficiently plus a respectable bandwidth by S. C. Chuck Smith, WA7RAI

A 160 meter antenna with a base loading coil used to tune the two lower frequency segments of the band.

A monoband J pole antenna dimensions sheet by N6JSX

Schematic diagram for the Kenwood KPG 46 programming cable interface for Kenwood TM 271E TK 71 TK 81 TK 7302 NX 700 NX 800 series

Online professional-grade high-frequency (3-30 MHz) propagation predictions

CTCSS Decoder and Encoder, DTMF Decoder projects

Connecting centre fed antennas, dipoles, yagis, rhombics, loops to coaxial cable, unless care is taken, it is not difficult to end up with feeder radiation resulting in power loss and the radiation characteristics changes

Comprehensive guide to understanding of solar indices, reading this article you will allow a better understanding and interpretation of propagation forecast bulletins and propagation reports

80M field expedient antenna, suitable for NVIS operations

Schematic of a regulated 0-24v 2A Power Supply

Chip64 mp3 file

On-line log for 3XY1T Guinea DX Pedition 2016

Italian magazine mainly dedicated to homebrew and parts

The rhombic antenna is a diamond-shaped antenna, suspended between 4 masts.

Comparing the TH-F7E with the Icom IC-E90

One of the most useful antennas in the repertoire is the Marconi or quarter wave grounded vertical antenna. Its invention made it possible to halve the length of antennas, simplifying communications, especially at HF and below.

This article documents the modification of 2 types of Hewlett Packard switching power supplies to enable their use as power sources for ham radio equipment

These instructions use simple, generally familiar examples of equipment types and are designed to help you find the adjustment that suits you best. If you are looking on how to adjust a morse key, bencher key, paddle or straight morse key, here you will find all instructions.

Article about homebrewing a G5RV antenna by KC6CFF

Free memory management software for the Yaesu FT-991 and FT-991A models. It runs only on Windows 7, 8, 8.1, 10 both 32 and 64 bits, it also permits basic remote control features and allow backup and restore settings and memories. Documentation in mainly in French.