windom 20 40

Multiband Cubical Quads - EI7BA Multiband Cubical Quads projects, includes two elements quad antennas for 10 12 15 17 20 meters band. Performance considerations, detailed pictures and construction notes.

A 40m Vertical - This antenna is intended as a simple, inexpensive solution for the newcomer to experiment across the 40m band (7.0–7.2MHz) when only restricted space is available

A better antenna-tuner balun  ^pop - Which balun to use? The hybrid balun promises advantages over both voltage and current baluns by ZS1AN

20m QRP Dipole - Instructions to build a portable dipole for 20 meters

The Monoband HF dipole antenna - If you are looking for an easy antenna for your favorite band, you can't go wrong with an halfwavelenght dipole, all you need is 3 insulators and some wire

A Horn Antenna for 2.4 GHz. - This Antenna is not really practical for AO-40 reception, but horn antennas have a number of qualities useful in microwave antenna testing and noise figure measurements.

A 5 band log periodic dipole array - Modified version of the Telerana antenna which was orginially featured in the July 1979 issue of QST. The array is suspended within a framework made of fiberglass poles emanating from a central hub with the ends tied together with light weight rope around the perimeter. 10-15-20-30-40 meter band coverage

HF Mobile Antenna HB9ABX - Most efficient hf mobile antenna, This mobile antenna is designed for all HF bands from 10 to 80 meters an proved to be very efficient in my travels in South America on 15 and 20m for contacts to Europe and within South America.

Windom off center fed antenna 80-10 mt - This antenna is not a true Windom, but rather an off center fed or OCF dipole works on 8 bands from 80 to 10 meters

A tri-band 2 element portable Yagi - Additional notes and eznec file on original article of a Portable 3-Band Yagi antenna for 10-15-20 meter band made with wire elements, original article published by VE7CA

408 Mhz Quagi Antenna - PDF file on building the SARA 408 Mhz Quagi antenna

HB9AFO: antenne Quagi - Two quagi antenna plans for 432 and 144 Mhz, includes dimensions for a 1200 Mhz antenna. In french

Why a Beam Antenna - Some basic antenna information for the newcomer

Installation of a Utility Pole - There are many ways to support an amateur radio antenna. Installatio of a utility pole will provide an antenna height of approximately 13 meters (40 feet) and will require no guy wires.

Link Coupled Tuner - Legal Limit Link Coupled Balanced Tuner,for the amateur ham radio HF bands. This Tuner uses plug-in Coils sets for 40, 80, & 160 meters

A Quadruple Helix for AO-40 - A homebrew project of a quadruple helix antenna system based on G3RUH 16 turn helix antenna for 2.4 GHz.

Marts agm 2005 - tujuhtiga

JA1NLX Ham Radio - Ham blog from japan

Meridian Fire/Lauderdale County MS EMS/Fire Stream - This stream covers the whole County of Lauderdale Mississippi including the City of Meridian's Fire Dept.

A Little Mobile Information - Alan Applegate (K0BG) article on mobile oprtations

Recycled Equipment Company - Recycled Equipment Company buys and sells quality used electronic test equipment.Over 40,000 square feet of inventory. Dealers in used electronic test equipment since 1993.

Kitmondo: used test equipment - Kitmondo is an online marketplace for used test equipment and measurement equipment including analyzers, oscilloscopes and generators equipment.

Soldering PL-259 Coax Plugs - An illustrated and complete guide to soldering PL-256 coax plugs by W8WWV

Delabs technologies Product Design and Engineering - Around 200 electronic circuits in pdf format or images, There are also over 1000 links to useful electronics, freeware, open source websites. There are some 100 useful documents, software and pcbs too. Mainly industrial electronics, instrumentation. Covers Various aspects of electronics and basics of circuit design.

A low pass filter circuit - A simple 7 element, Chebyshev low pass filter, rolls of at 30MHz. Attenuation is better than -40dB at 60MHz, -65dB at 90MHz, -80dB at 120MHz.