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A presentation of a HF multi-band sloper antenna. This antenna project is for low band operations, and antenna presented in this article works on 40 80 and 160 meters band. Article is in Polish.

2 transistor transceiver for 28MHz CW

PIC micro controller based frequency counter with LCD readout

Tips on winding wire coils used as inductive loads, traps, band-pass filters, are implemented in a number of amateur radio projects especially antenna projects

This document describe serveral wire antennas, from the folded dipole, to the common halfwave monoband antenna for those who want to make HF portable operations in holiday.

Download the Yaesu VX-8R Cheat Sheet PDF File

70 MHz transverter, 4m band, by G3XBM

Review of Cushcraft MA-5B multiband Antenna after some days of usage.

My Top Five Backyard Multi-Band Wire HF Antennas. A selection of the top 5 HF wire antennas for the backyard and for multi-band operation

Photo construction manual of a portable antenna made with two heavy duty whips by buddipole. In this article has been implemented a 50 MHz portable dipole.

Find out how much to adjust the length of a quarter wave whip or a half wave dipole rather than the outright cut-and-try method.

Printable Quick Reference Card for Yaesu VX-7R

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.

Trap-style Inverted-V Antenna for 3.5, 7, 14, 21 & 28 MHz

The Burnham Beaches Radio Club frequency counter is a PIC micro controller based frequency counter with LCD readout. It can be used stand alone or the in built offsets allow integration into a receiver

W5UXH version of OZ1JHM Morse Code decoder project

A home made 4:1 Ferrite QRO Bal-un with a FB 241-61 Type K

Building a Windom HF Antenna. A PDF file presentation about homebrewing a windom antenna for the HF bands with formulas for 40 and 80 meters bands and step by step guide on making a 4:1 balun to feed the antenna.

Quarter wave groundplane antenna for 2 meters FM by AA1PG

An interesting article on guanella baluns that cover several aspects of homebrewing 1:1 and 4:1 current baluns by KN9B

Repair LDF Z-100 toroid by VK4ADC

Diamond W8010 Multiband Dipole Modifications

Skin effect and proximity effect on making coils with stranded wire. An interesting comparison on making coils.

QST Magazine, 1991 July, review of the Kenwood TS-850S 160-10 Meter Transceiver

Ameritron QSK 5 PC mod for AL80B

Construct a compact, 20 meter rotatable dipole antenna of durable weather worthy components supported at a single point obviating the need for multiple supports and multiple support ropes crossing the yard.

The Ameritron ALS-600 600-Watt HF Power Amplifier review by AD5X

May 2015 Radcom Article on common-mode chokes that can be used for control cables, phone lines, but mostly on typical HF antenna systems. This article explain what common mode chokes does, why you meay need one, properties common mode chokes should have, how to build and measure performances.

50MHz Collapsible 2 Element Mini Beam antenna, an overview the development of the 6MBA.

IARU Region 3 bandplan Revised 12 March 2019

Globe-S for RTL1090 is a light radar viewer for RTL1090. It communciates via a HTTP interface and can be interfaced over long distances.

An ham radio contest log sheet in a PDF US letter printable format, can be used for portable operations, free to print and download.

A handy piece of test equipment useful for HF bands, can absorb a 200W modulated carrier for almost 2 minutes. It is housed in a tin and part filled with dry sand that helps in power dissipation

Calculate the value of an unknown resistor with this free program for windows

This article is about a simple vertical end-fed-half-wave wire antenna for 10 meters that can be used in case of restricted space.

In this article the author provides some guidelines on how to solve a common problem when stacking different types of yagi antennas on the same mast, limiting the effects on gain and radiation pattern of both antennas

This app will give you a 16 tone DTMF keypad and the ability to generate custom DTMF sequences, and set the duration and tone to silence ratio. Includes the characters 1234567890*# and the menu tones ABCD. You may enter a custom sequence via the keypad, soft keyboard, or speech if your device already has speech-to-text capability. This is basically a touch tone telephone keypad, which may be of interest to amateur ham radio repeater operators

A complete guide to undestand and know how electret condensor microphone elements works by K3DAV

Layman level explanations of "seemingly" mysterious LF MF and HF propagation occurrences.

This sweeper built for a narrow bandwidth filter adjustment, use a simple 555 version sawtooth wave generator.

Six elements yagi antenna for 6 meters band. This antenna design is based on the QuickYagi 4 software by WA7RAI, uses a 6.5 m boom, feature 12.0 dBi gain and 35dB front/back

A transceiver front-end protector in high signal level environments. An homemade RF limiter to protect your receiver front-end from high radio frequency.

QRQ or Copying CW over 70 wpm

VK Contest Log (VKCL) is a free contest log software specialising in Australasian contests but also covering some international ones too. Author is SK, you can donwnload the latest version 4.15.

A guide on manually programming D-Star ID-51A and ID-31A Handheld

Experimenting vertical wire antennas for 40 and 20 meters supported by balloons resulting in excellent gain in RX and good overall performance against horizontal dipole

Homebrewing a Gamma Match to tune yagi antennas

Study of the Coaxial Dipole: Just how does this thing work.

Receive and listen to FM and AM radio broadcasts on your browser or ChromeBook using an RTL2832U-based USB digital TV tuner.

Yaesu FT817 all band, all mode handheld transceiver article.