two tone

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.

Quad antenna for 10 and 15 Meters - Building guide for a two element quad antenna planned for 28 and 21 Megahertz

2 Meter 10 Element Quagi Antenna - This antenna was designed by N6JSX Kuby for Transmitter hiding. Fitting the requirements of directionality, high gain, and portability. This antenna was derived from the ARRL Handbook information on Quagi's and Yagi's; in the absence of two meter Quagi information, UHF Quagi dimensions were scaled into 146 MHz use.

2 meter quagi - A two meter band quagi antenna plan by ku4ay

Two portable antennas for 6-meter - VE7CA reprint an interesting article taken from arrl antenna compendium. Two elegant practical and portable 6-meter gain antennas, a two-element quad and a tree-element Yagi antenna for 50 Mhz-6 meter band

2.4Ghz Helix antenna  ^pop - Concise instructions on making a broadband helical antenna for 2.4GHz use, such as: 802.11b wireless networking 2.4GHz video links.

QRZ de W3DF The Quad Project - A two element multiband quad antenna

Cubical Quad Antenna Calculator - The function of the calculator is to give all of the needed sizing to construct a good 5 element quad antenna for amateur radio use.

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

The L‐Network Impedance Matcher - N6LYU Greg article on L-Network

How to build a tin can waveguide antenna  ^pop - Looking for an inexpensive way to increase the range of your wireless network? A tin can waveguide antenna, or Cantenna, may be just the ticket. This design can be built for under $5 U.S. and reuses a food, juice, or other tin can.

Dish 802.11 Wireless Networking Antenna - This antenna modification is for the IEEE 802.11b networking protocol that operates at 2.4 GHz. It can be scaled easily to the 5 GHz frequency used by IEEE 802.11a by simply scaling the dimensions on the feed can and the excitation antenna to 2.4/5 = 48% of the dimensions shown above.

A two element yagi bean - Simple gain antennas for the beginner, a 2 element yagi antenna

EA3BHK Xavier - Personal amateur radio page abaout dx, dxcc, iota, clusters network.

GAO Engineering - Gao engineering offers a wide range of affordable, popular and reliable rfid products, dsp, arm and other microprocessor evm and development boards, ides, universal programmers, emulators, dsp learning systems, micro-network terminals, test and measurement products for engineers.

Sunstone Circuits Priority listing - Sunstone Circuits is your easiest source for quoting and ordering printed circuit boards online. We are three respected brands in one: PCBexpress quickturn boards, PCBpro.com full-featured and design-checked boards, and PCB123 design software.

AN Wireless Tower Company - AN Wireless is a manufacturer and distributor of Self Supporting Tower Systems for Wireless Communications, Wireless Internet, Wireless Networking, Microwave, Paging, Broadcast, Two-Way Radio and Amateur Radio.

MARC: Motorcycling Amateur Radio Club - MARC is dedicated to providing safe and reliable two-way radio communications for selected charity events in their respective regions

Scanner Standman - These are custom built adjustable stands that hold handheld scanners, handheld amateur radios, two-way radios and FRS communicators.

Lteck Batteries - Two Way Radio Batteries, Rechargeable Batteries, Radio Batteries, Battery Chargers, factory direct with lowest prices available!

Radio Products UK - RPUK Ltd market a high quality range of covert earpieces for two way radios, including Motorola and Kenwood

RadioLabs - Radio, Wireless and Beyond - Specialize in engineering, design and repair of all rf equipment. Dealer for two way radios, scanners, shortwave radios, wi-fi antennas, wifi amplifiers. Based in Fortuna, California.

IP-Sound  ^pop - IP-Sound is a Free application for audio exchange client to client over a TCP/IPv4 network (Lan/Internet). The main purpose for the existence of IP-Sound is to provide low quality audio 8-16kHz, with low latency for use together with remote control software for "ham" radio amateur equipment. IP-Sound is developed by SM5VXC.

Beacons - The W6AMT Beacons is a Windows program which automates the collection of radio propagation data. HF data is collected by monitoring the worldwide network of NCDXF / IARU HF beacons.

RFI From Computer Networks - Is your router shutting you down ?