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DXMaps.com presents a dynamic, real-time mapping service for amateur radio DX spots, integrating data from traditional DX clusters, _PSK Reporter_, and WSPR networks. The platform visually plots global QSO and SWL activity, enabling users to observe propagation conditions across various bands, from 2200m to >450 MHz. It offers distinct overlays such as the magnetic equator, gray line, moon footprint for EME, and VOACAP propagation predictions, providing a comprehensive view of radio wave behavior. The service allows granular filtering of displayed spots, including options to show only DX-Cluster data, PSK Reporter activity, or WSPR signals. Users can refine the map view by selecting specific bands (e.g., 160m, 20m, 6m, 2m), limiting spots to the last 15 minutes, or displaying only contacts exceeding **2600 km**. Additional features include the ability to toggle grid squares, aurora forecasts, and various amateur radio zones (CQ, ITU). Distinctively, the resource updates automatically every minute, ensuring current propagation intelligence without manual refresh. It also supports specialized views for EME, ionospheric scatter, and aircraft scatter, alongside FM DX and APRS activity. The platform emphasizes the importance of accurate locator information in DX spots to enhance data quality and offers a user manual and FAQ for guidance.

PA3ANG online receiver Ten-Tec RX320 from holland

Schematics, modifications and manuals for ICOM IC-746

Sharing beverage antennas with this switch boxes is possible. This article describes a 6-position remote antenna switch for Beverage antennas on 3 bands (160m, 80m, 40m). It allows selecting one of 6 antennas for each band without affecting other receivers. The system uses a control box with a rotary switch and a separate splitting box with bandpass filters for each band.

A simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres, made from 16 feet of RG58 coax cable. The performance is impressive for its size but not meant to replace a Yagi. The antenna features a tuning head, matching unit, tuning capacitors, band change switch, and matching transformer. The feedpoint is at the bottom of the loop. The document provides detailed instructions on assembly and operation.

A full featured Receiver Controller for TenTec Rx320 with Audio Processor, digital modes decoder, ILG DataBase Manager and much more. Support for Drake R8A/B,ICOM PCR-1000, ICOM R756Pro and ICOM R756 Pro I ICOM IC-R75, JRC NRD-535, Kenwood R5000, TenTec RX320(D) and TenTec RX350D receivers

A large collection of amateur radio maps, including CQ and ITU Zones, a complete set of ham radio Prefix Maps, grid locators and time zones map. An excellent ham radio mapping service.

Control an ICOM PCR-100 and listen to the audio stream. This web controlled receiver si based in the Netherlands by PA3ANG and offer 10kHz - 1300MHz in AM, FM, FMW

Mods and manuals for the FT-2000

Log Online for 5J0R

An HB9CV antenna for the 70 cm band in french

This is my simple implementation of the ARRL Antenna Book design equations for the axial-mode helical antenna.

A double dipole for the 20 and 15 meters band in french

Freeware windows RTTY PSK31 software decoder that allow logging, award tracking and qsl printing. By SQ1FTB

6 Meter DX Map with reports from the VE7CC DX Cluster

Online calculator for Cantenna special antenna for 802.11 Wi-Fi bands

Lets you automatically record your favorite radio programs from Web Radio broadcasts, and then listen to them later on your PC, MP3 player or Pocket PC.

Forum thread about possibility to extend VX-6R to freeband and 6 meters

A small antenna for all amateur bands, including 80 meters, and in a small garden without the compromise. An ideal replacement for those half size antennas such as the 1/2 size G5RV and Windom 40

Home made bazooka antenna for 2 meters band

Search for call sign and display maps and dxcc info

KGKSDR is my attempt at some SDR decoding software. I'm putting this software together purely as a learning exercise, to better understand the mathematics behind SDR in general.

IC 706 modifications collected by mods.dk

Calculate dimension for discone antennas online

A list of all IOTA reference numbers and IOTA groups for the Islands On The Air award, personalised to your own QTH

Modifications for Icom IC-2100H by mods.dk

The Voice Keyer is a free Windows based voice keyer. It is very easy to use and it handles up to seven messages. By connecting your computer soundcard to your radio it's possible to just press a button and the computer will CQ for you, to spare your voice. It can also PTT your radio via the LPT port by SM3WMV

ICOM IC-V8000 modifications, manuals and schematics

Includes link to VX-150 manual in pdf format

Official IARU Region 1 band plan

Write down grid squares of your QSOs and this nice online tool will create a World map with all contacts QTH linked to your home QTH. The QSO map picture can be downloaded for resharing.

An online audio signal generator application capable to reproduce different waveforms with variable frequency range

Search the online log of VP8PJ DX pedition to South Orkney Feb. 21, 2020 - Mar. 6, 2020 Log search offered by M0URX.

VX-5R Loose antenna cure, Vx-5r Free Band, VX 5 R modification for German, VX-5R expanded frequency mod, VX-5R MARS/CAP & freeband mod

Calculate dimension for HB9CV directional antennas

ICANN policies require registrars to verify domain registrant email addresses within 15 days of registration or transfer, a critical step for maintaining domain activity. Failure to complete this verification process results in the suspension of the domain, rendering the associated website inaccessible. This resource details the common reasons for such suspensions, including new registrations, changes to registrant email addresses, or domain transfers where verification was not completed. To reactivate a suspended domain, the registrant must click a verification link sent to their email address by the registrar. The process typically resolves the suspension within 30 minutes after successful verification. Registrants can request a resend of the verification email through their domain provider or use a trigger code if available. This ensures compliance with ICANN's _Registrant Verification Policy_ and restores website functionality.

The PIC-MORSE is an electronic iambic keyer, integrating a generator of Morse code and a sidetone. It is built with a microcontroller PIC16C711. In French

Ideal for QRP operations on 10 meters band in french

Software for radiomonitoring, radio spectrum analysis. MDS is designed for the real time radio spectrum analysis. It performs real time activity analysis, signal search and collects spectrum data for post time analysis.

A moxon antenna for UHF in french

This page is a short description of the four phased verticals system i've build and used. It is primarily intendend to be used on the lower bands 160m, 80m, 40m.

Overview, summary, tutorial about the dipole antenna or dipole aerial that is widely used on its own and as the basis for other antenna designs.

List of italian airport frequencies

Modifications collected by mods.dk

Click on the map and the QTH locator will be calculated

A project for a portable antenna for amateur radio satellite reception, for 2 meters and 70 centimeters bands

A 46ft multi-band antenna for small gardens that works on 80m. An excellent DX performer and is an ideal replacement for your half size G5RV by G7FEK

G4URH calculations to design your own antennas, ground plane, half wave antennas, Quad Antennas and 5/8 verticals

modifications collected about Yaesu VX-150 by mods.dk

Presents the design and construction of the OK2FJ Bigatas, a portable, automatically tuned vertical antenna covering 80 through 10 meters. It details two distinct control systems: one utilizing BCD band data from Yaesu FT-857/897 transceivers, and another employing voltage level sensing for the Yaesu FT-817. The resource provides specific instructions for building the antenna's radiating element, loading coil with switchable taps, and the control circuitry, emphasizing the use of readily available components. The article outlines the physical construction of the antenna, including the use of duralumin tubes for the radiator and a PVC tube for the coil form. It specifies coil winding details, tap points, and the integration of radial wires for ground plane operation. The control electronics section provides schematics and component lists for both the BCD decoder (using a 74LS42 IC) and the voltage comparator (using an _LM3914_ bargraph driver), enabling rapid, automatic band switching without the minute-long tuning delays common in other systems. Crucially, the antenna achieves rapid band changes, with typical SWR values centered on common operating segments, such as **3.7 MHz** for 80m SSB. It also discusses modifications for CW operation on 80m and the trade-offs between antenna efficiency and full-range automatic tuning on higher HF bands, where manual adjustment of radiator length is suggested for optimal performance on 15m, 12m, and 10m. The resource includes construction photos and a discussion of cable requirements for reliable operation.