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Build your diplexer with more than 70db port isolation and less than 0.2db attenuation. Easy project.

A 6 elements VHF Yagi antenna designed with YAGIMAX 3 and made by SV1XY with excellent results on local and satellites contacts like UO-14 and AO-27

UHF cubic antenna with a 16db gain

Antenna design from ZS6BKW (G0GSF), similar to the G5RV, but it actually resonates on five bands It's only 90 ft long 27.51 m, with a 40 ft 12.2 m downlead

A Simple Nondirectional Antenna for Ten Meters QST February 1950, Easy to build J-Pole antenna for restricted space.

The document is a PDF detailing the construction of the DBJ-1 VHF-UHF Dual Band J-Pole antenna for amateur radio use. It provides instructions on how to build a high-performance dual band base antenna for VHF and UHF bands using a single feed line for less than $10.

A PDF file containing the US grid square map provided by Icom america.

UHF 3 element portable antenna with gamma match by ON6MU

This is the antenna for those who want to get on HF effectively, and haven't too much space or cash to throw around

The G3TPW Cobwebb antenna covers five bands, 14 - 28 mhz, including the WARC bands

Freeware antenna software that lets you see what the polar diagram of your rotatable beam actually looks like where it is operating. With PolarPlot you can measure the polar diagram of the antenna and check for abnormalities - compare plots taken before and after changes to the design or location - check the -3dB beamwidth - look at the front to back ratio - see the size and position of the sidelobes.

The Adcock antenna has been used for a long time for RDF. It is basically an interferometer.

Using delta match with HF antennas design

Download the PDF with USA Amateur radio HF band plan and common country prefixes updated in 2008 by Icom

A project by DL5DBM for a VHF UHF antenna suitable for handheld transceivers

Infomration schematics and pictures about various hf and vhf QRO linear amplifiers

North America Grid Locator map by ARRL

How to build a trapped rotary dipole with many photos ecc.

HF/6M antenna tuner preselector and antenna switcher project by ON6MU

US ham radio band plan in pdf available for download and print

AM/FM/CW QRP RF Power Amplifier for the HF 10 or 11 meterband (28MHz/27MHz)

English language International Shortwave broadcasts listed by search time.

1500 Watt HF power amplifier

If you have ever tried transmitting on HF from a tall block of apartments, where it's just not possible to erect a substantial aerial system, then this article is for you

Italian page including pictures schematics diagrams of an home made linear amplifier using four EL509 in parallel. Output power is about 700W.

These pages provide general propagation advice for HF communicators. Information available includes inferred global propagation conditions, real time HF fadeout coverage charts, regional ionospheric vertical MUF maps and Hourly Area Prediction charts for Astralia and Asia, Europe and North America

A pedestrian antenna is considered to be a lightweight antenna that can easily be carried to the shootout by one person in a backpack or bag.

This project is about a cheap way of building a colinear antenna for VHF 145MHz, and having about 10dB more gain than that little 1/4-wave magmount

NuMorse 2.20.0.0 for Win 7/Win 8/XP/Vista/Win 10 A complete rewrite of the original NuMorse used by thousands of radio amateurs to gain and upgrade their licenses. NuMorse offers an intermediate feature set that is somewhere between the lean and mean NuCode program and the vast array of features supported by NuMorse Professional. But NuMorse is no cut-down program. It has several unique features not found in other Nu-Ware products as well as a compact and intuitive set of controls that you will be able to learn quickly.Product is no more developed and out of support.

Article by N6JSX on homebrewing quad antennas for VHF and UHF.

G8JNJ Broadband HF Vertical Antenna - Requires no tuner - great results from 40m to 10m plus 80m & 6m with reduced performance

KF4SCI picture of a project for a VHF UHF jpole antenna working on 220 and 440 MHz.

HF QRP Linear Amplifier with 2x 2SC2166 + 2x 2SC1969 Push Pull Transistors (13.8V)

W5ALT Indoor Vertical Antenna is a base loaded vertical antenna that can be tuned on almost all HF bands by adjusting a big coil. Operating a ham radio station from an apartment in Maracaibo, Venezuela, the author demonstrates effective communication with over 100 countries using a custom-built indoor vertical antenna. Addressing common misconceptions, the design uses a balanced approach with radials and a base-loaded vertical element made from affordable materials. The antenna fits discreetly indoors, covers 6 to 40 meter bands, and achieves acceptable SWR with an MFJ tuner. Despite limited space and typical apartment challenges, the setup enables reliable DX contacts, confirmed by numerous QSL cards, proving indoor antennas can perform well in constrained environments.

A vhf moxon antenna plan

VHF Antenna in a lunchbox. The magnetic loop on two metres band Lloyd Butler VK5BR

Do your multiple-transmitter field day or contest efforts suffer from intrastation interference ?

Yaesu FT 101 unofficial web site managed by NW2M

A light and compact antenna that is easy to build, and easy to find parts for. Band coverage is 60 through 10 meters.

This page will describe the construction of a multi band SSB transceiver with all its components Band Pass Filter, Oscillator/Modulator unit, RX/TX Mixer TX Amp I.F. Amplifier AGC VFO Driver amplifier Receive audio amplifier Final amplifier Low pass filter Digital display and VFO stabiliser

Memory management (cloning) software for the Yaesu FT-8900R quad band FM mobile transceiver

10 to 20 meters band log-periodic antenna project with SWR Plots, boom lenght and element spacing.

Plan for a log periodic antenna for the 14Mhz-30Mhz by F6DOP in french

Memory management programming software for the Yaesu VR-5000 receiver

An air cored 1:1 balun for 3.5 to 30.0 MHz

A simple and low cost multiband vertical hf antenna covering 5 bands (20m-10m) from an old CB antenna

A homemade Magnetic Loop antenna from a spare 3m length of RG213 working from 30m to 15m with a 130pF tuning capacitor

Microphone, accessories and data packet pin connection schematics for Kenwood Radios

Amateur Radio bandplan in a large PDF A3 format valid for Serbia and Region 2. This band plan can be donwloaded and printed on a color laser printer for optimal quality.

A large worldwide map of aeronautical service Frequencies allocation on HF bands dated 2002