ara 2000

160 meter linear loaded Inverted L antenna - The total length of the inverted L is 240 feet, which is 7/16th of a wave length long. It has a 92 foot horizontal linear load section 1 foot above ground that terminates into a home-brewed parallel network tuner by KN4LF

K1FTK 160 Meter Antenna Projects - K1FTK 160m vertical antenna project, K1FTK beverage antenna project

Transmission lines - Transmission lines and measurement of their characteristics

Feeder Radiation - Connecting centre fed antennas, dipoles, yagis, rhombics, loops to coaxial cable, unless care is taken, it is not difficult to end up with feeder radiation resulting in power loss and the radiation characteristics changes

Two-Wire Open Line - Article on various type of transmissium medium, like parallel lines, twisted pairs, shielded pairs, coax lines

Petlowany Antennas by K6NO - WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiral-shaped coil and excited by a radio frequency current connected to the innermost portion of the coil, it will then, and only then, exhibit RF characteristics that closely approximate those of a resonant linear wire of the same length

Vertical vs Horizontal antenna separation - Isolation vs antenna separation an interesting article by WA6ILQ

Antenna Tuning Units for better reception - For good Short Wave reception long aerial really is required to dig those distant stations out of the ether.

Araucaria DX Group - DX group and contests sponsor in spanish

Saratoga Amateur Radio Association - The Saratoga Amateur Radio Association provides emergency communications for the City of Saratoga, and promotes amateur radio in the community.

AB6MV Moreno Valley Amateur Radio Association - Our goal is to provide a forum and learning environment where club members and visitors can share ideas and experiences regarding amateur radio.

Sullivan County Emergency Services ARA - The Sullivan County Emergency Services Amateur Radio Association headquarters is located in the Sullivan County Courthouse Laporte, PA.

W3SGJ Beaver Valley Amateur Radio Association

W3UER Delaware County Amateur Radio Association - Linked Repeater System in Darby, PA

The Philadelphia Area Repeater Association - Founded in 1971 count over three hundred members, covers the entire Delaware Valley and beyond

The Anthracite Repeater Association - The ARA provides communications services to the area through its network of repeaters at the club site near Freeland PA

Lone Star Amateur Radio Association - Lone Star Amateur Radio Association

Farallon Electronics - PACTOR mode radio modems and accessories, performance sailing electronics and innovative hard to find parts. Audio cables, packet cables, usb to serial converters

Long Range Wi-Fi - Long range Wi-Fi antennas you can build. Helicals, parabolics, and biquads discussed. How to add external antennas to WUSB54GC and F5D7050 usb wireless adapters for long range connections.

Yaesu FT-102 page - Relay substitution tutorial, power amplifier tuning and Technical Characteristics

Daraz Frequencies - Australian scanning frequencies

TEL-Atomic Incorporated - Tel-atomic sells physics educational apparatus, oscilloscopes, counters, magnetic meters

Tone Sound Frequency Sweep Generator - Generating of up to eight independent oscillatory processes per each channel with separate frequency, initial phase and amplitude controls.

WinRad - Winrad is a software program designed to implement a so-called Software Defined Radio (SDR), meant to run under Windows XP, Windows 2000, or Windows 98SE

Economical keyer - Using the PicoKeyer chip. Features a 60 character memory, setup & message entry using a paddle and no battery is required to retain the memory.