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Yaesu FT-847 (FT 847 FT847) transceivers mods reviews software manuals and diagrams

Topic regarding a new 1KW HF power amplifier with 2x GI7B

List of modifications for the kenwood TS-50

A Quagi antenna project with pictures and dimensions for a UHF Quagi antenna

Demonstrates the construction and measurement of a single-turn HF receiving loop antenna, built from common materials like electrical conduit and lamp cord. The resource details the physical dimensions, including a 4-meter circumference, and calculates the theoretical inductance at approximately _6.4 uH_. It outlines a method for determining resonant frequencies across the 4-17 MHz range using a _C Jig_ and a _VR-500 receiver_, coupling the loop with a ferrite ring. The article also discusses the impact of receiver coupling on the loop's Q factor, noting a degradation in sharpness due to the transformer's reflected impedance. Analyzes the observed resonant frequency patterns, highlighting an unexpected rise in the loop's effective inductance at higher frequencies, particularly above 13 MHz. While some increase is attributed to distributed capacitance, the rate of rise suggests further investigation. The experimental setup provides practical insights into the challenges of maintaining high Q in simple receiving loops and offers a comparative reference for other homebrew antenna projects, such as those by _VK2TPM_.

An home-brewed morse code CW filter with a central frequency of 800hz and a variable bandwidth from 230hz to 26hz by F5RDH in french.

Grig is a simple Ham Radio control (CAT) program based on the Ham Radio Control Libraries (Hamlib). It is intended to be highly generic presenting the user to the same graphical user interface regardless of which radio is being controlled.

Modifications and messages about the Yaesu FT-450

Basic information on the folded dipole antenna

Choosing a vertical antenna. Buying guide to amateur radio HF vertical antennas by Bencher inc

How could we share the Beverage antennas on more than one station using this homemade remote antenna switch, a project by TK5EP

World data center for the sunspot index

A simple RF power amplifier initially designed for 40 meter band can work on 10 15 20 40 80 meters

The UK amateur radio licensing scheme features three distinct tiers: Foundation, Intermediate, and Full, each granting specific operating privileges. For instance, the **Foundation Licence** permits a maximum of 10 watts output power on most allocated bands, with restricted band access. The Intermediate Licence allows up to 50 watts, while the **Full Licence** grants access to the maximum UK legal power limits and all available amateur radio band allocations. UK call sign prefixes and formats provide insights into the licensee's class and the approximate issuance date. For example, M3, M6, and M7 prefixes with three letters denote Foundation Licences issued from 2002, 2008, and 2018 respectively. Intermediate Licences, often starting with "2E0" or "2E1" followed by three letters, were issued from 1991 onwards. Full Licences encompass a broader range of prefixes like G2, G3, G4, G0, and M0, with varying letter counts indicating different historical license classes and issuance periods, such as G3 plus three letters issued between 1946 and 1971. Special prefixes like GB are reserved for repeaters, beacons, data mailboxes, and special event stations, with specific numerical sequences (e.g., GB3 for repeaters, GB7 for data repeaters/mailboxes) indicating their function. Optional prefixes such as GC, GD, GI, GM, and GW denote specific UK countries (e.g., Wales, Isle of Man, Northern Ireland, Scotland, England) and can also signify club stations.

Nowdays lots of people are putting up antennas to either beam in different directions at the same time or just to stack them and get a lower angle of radiation. Use this stackmatch to match you array.

This is an 80 metre dipole that fits in a small spac

VHF & Up Software management, Station Log and maps, in English

A homemade VHF/UHF vertical antenna made essentially with RG58 coax cable, with a 9 turns choke balun to prevent the shield acting as a RF Radiator.

Linear amplifer picture gallery

If your doing any home brewing gear for ham radio its a great idea to have a dummy load. This will to your radio be the perfect antenna...it will never radiate but your radio sees a perfect 50 Ohm impedance.

On-line Log search for 5U5R DX Pedition to Niger 2017

Raspberry Pi WebSDR Receiver Project running SoftRock Lite ii Receiver (40m) and Raspberry Pi Model B

An extension of the excellent decoding software JT65 HF by Joe W6CQZ for amateur radio digital mode JT65

Free windows logbook program for SWLs, allow a quick and fast SWL logging during ham radio contests. Dupe check, utc time, partial check, cabrillo file export, multi language support

Mods.dk - modification for IC 2720H

Amateur radio open source log program written in PHP. Put your log online for visitors to browse in real time. Access your log from any web browse, can run under windows linux and macos with apache, mysql and php

ham.dmz.ro FT1000 pages

Demonstrates a practical approach to improving Morse code proficiency through a curated selection of audio files. The resource offers downloadable MP3 files designed for CW practice, catering to operators aiming to increase their copying speed and accuracy. Content includes both standard words and specific amateur radio callsign groups, which are crucial for effective on-air communication. The files are organized to facilitate progressive learning, allowing users to select material appropriate for their current skill level. This collection supports the development of essential CW operating skills, particularly for those preparing for contests, DXing, or general ragchewing on HF bands. The _ON6ZQ_ site, maintained by _Christophe David_, also features information on his _Reverse Beacon Network_ skimmer and _SOTA2APRS_ feed, indicating a strong focus on active operating modes and digital integration.

Ferrite rod antenna or aerial, a form of RF antenna that is widely used in RFID and transistor radio applications.

A Smith charting program. You can enter either discrete components or transmission lines, see the results on screen and/or generate Postscript output. Component values can be changed numerically or using scrollbars.

A complete guide to Baluns and transformers by WK5AJL

Development of the Slim Jim antenna for HF

A very basic guide to antennas concept. Explain the usage of dummy load, basic antennas like dipole o j-poles.

Arduino Band decoder project available in KIT

Setup and issues with the Gap Titan DX antenna

This article describes the characteristics of the Windom antenna and shows the results of several simulations made with MMANA-GAL, covering models optimized for the 20 m, 40 m and 80 m bands.

Helix antenna design and construction details

The basics of what is a discone antenna for wide band or bandwidth omnidirectional applications.

This World Clock displays time in two user selectable time zones. Each time zone can be switched between 12h and 24h format.

This online microstrip patch antenna calculator determines the length and width of a microstrip patch antenna for a given frequency

Pictures of IC-7000 and related accessories

Search for recent spy numbers listening or add your loggings.

my mods.dk

Speaker Microphone Pin Out, Dual PTT Switching,Programming Cables, SMA Antenna Connection, Extended Antenna Threads for Baofeng UV 3, UV 5 Series handheld transceivers

Helix antenna online calculator with match calculator

VSP Manager is a software program that creates serial port pairs which allows software programs to talk to each other using Cat commands. This virtual com port emulator is offered FREE to Ham Radio Operators.

Band Plan for HF Bands by IARU Region 1, effective 2014.

Notes and details on repairing Traps on Cushcraft A3S

On-line Log for HD8R Galapagos 2021 DX pedition

Mods collection for the Icom IC-7000 at mods.dk