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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.

An Energy Analysis at an Impedance Discontinuity in an RF Transmission Line

This manual is an edited version of the GAP supplied document, complete with diagrams, pictures and assembling notes by Mitch Baum AE2A. This is 29 pages document in PDF Format.

An homebrew audio mixer for the ham shack by GW6ITJ

An home made low pass filter for 70 MHz by IK0VAQ

Want to operate on 40 meters but only have a space a little over 16X16 ? Try this antenna.

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

A simplified Guide to the FT8. Dxpedition mode. By Stefano IK2HKT – Rel. 2.0.0 - January 2019. This document explains how to configure WSJT to work on F/H mode DXPedtions, how to operate and make a call to a dxpedition calling CQ in FT8 Fox Mode.

Slot cubes are folded skeleton slot antennas with widened, folded dipoles bent into a cube to reduce size. QST Article 12 2019

Digital voice on Amateur Radio - devoted to the discussion of digitized voice and data over analog emission modes.

This is a presentation used at OVARC on the LindenBlad antenna construction. The presentation cover several topics about this antenna, from the basic antenna design, to the guide on how to contruct a custom lindenblad antenna for the 2 meters band and and 70 centimenters band.

An home made FETer QRP transceiver for the 80 meters band

There are many designs for building preamps each with their own advantages and disvantages. In this PDF Article author reviews several different types.

Free Android app that tracks and alerts on ISS passes with specified criteria.

Article from 73 Amateur Radio Today about experimenting on ferrite loops transmitting loop antennas for 80 and 160 meters bands.

Design and build a 6 meter 2-element Moxon antenna mostly from available aluminum tubing and angle stock.

About Coax Traps, NC4FB examine the operation of coax traps through modeling.

Hone your Morse code skills with this entry-level project. Article includes the full schematic of the CW Trainer, describes the sketch and how to operate the morse code trainer.

How to run an SDR Receiver on the Android Google Nexus 7 using SDR Touch App and an RTL-SDR dongle, review and costs by IW5EDI

This document is a must read for anyone considering building a good low cost HF multi-band antenna system. The author combine in this document four important ingredients to produce simple but effective antenna system, like antennas of non resonant length, line attenuation, the transmatch and the balun

A 160W linear amplifier for 4 meters band based on GI0GDP

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

Cushcraft XM240 transformation into a Moxon antenna by W6NL

Have you ever thought of setting up a portable HF station for an activity ?