Radio Direction Finding

A turnstile antenna for 2-meter ARDF - Antenna design for use with hidden transmitters on international-rules ARDF events

Handi-Tenna portable satellite antenna - Here is a high-performance hand-held beam antenna that is easy to build and guaranteed to improve your downlink from the LEO satellites over ANY rubber duck or mobile whip

Build your DF Unit - Building your doppler, pictures and instructions.

RDF2 two element, close spaced Yagi antenna - This antenna is an adaptation of the RDF2 two element, close spaced Yagi antenna described in the May, 1996 issue of 73 Amateur Radio Today Magazine.

Hidden Transmitter Hunting - Lots of information of hidding transmitters, building portable yagi antennas, s-meters, and much more

RDF projects - Antennas, attenuators, fox timers, controlers and transmitters

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

Homing In - All about radio direction finding (RDF)

N6QAB Radio Direction Finding - N6QAB Radio Direction Finding Web Site, DF vehicles, transmitters, sniffers, dopplers, TH-D7A

ARDF Projects by WB2HOL - Antennas, attenuators, Fox Timers and Controllers and Fox Transmitters

7db tape measure yagi beam for RDF - A 3 element yagi beam antenna made with a tape measure. This design exhibits a very clean pattern and is perfect for RDF use.

Transmitter hunting - Locating or finding radio transmission sources or hidden radio transmitters is known as transmitter hunting.

WB2HOL RDF Projects - A collection of useful and interesting projects for the RDF enthusiast by Joe WB2HOL

The Microsniffer Project - The Microsniffer is a fully autoranging VHF or UHF sniffer which has been designed for those who are foxhunting on a budget.

The montreal doppler and more projects - PIC microcontroller projects mainly Fox Hunting

The NKARC Foxhunt Page - Foxhunting is the fine art of wandering aimlessly over hill and dale whilst loaded down with enough electronic equipment to singlehandedly repair the MIR space station...

The VK3YNG sniffer MK3 - This processor controlled autoranging sniffer has become popular for vehicle based foxhunting in Australia

Thunt.org : transmitter hunting - Amateur radio direction finding, transmitter hunting web site from San Francisco. Triangulating a radio signal direction and plotting its bearing on a map. Hunters use doppler systems for tracking hidden transmitters anywhere in the san francisco bay area, fremont california

Transmitter hunting - Locating or finding radio transmission sources or hidden radio transmitters is known as transmitter hunting.

UBA HF QRP FoxHunt - Fox hunting competition organized by UBA

VectorFox - VectorFox is a software born to incorporate a PC into the fox hunting environment. VectorFox is able to take inputs from up to 5 sources, such as a 2m beam, a 2m signal meter, a TDOA, etc, and display the results on the screen. VectorFox also accepts Agrelo inputs. From these results the operator can choose which indication is best and have a line drawn on the map in the direction of the signal.

VK3YNG 80m ARDF Foxhunt sniffer kit - Details of the vk3yng 80m ardf foxhunt sniffer

VK3ZPF Foxhunting site - Fox hunting site with details of a PC based DF system

WA6NOL.com - Ham radio, supercomputer, and ARDF pages and projects

WB2HOL Foxhunting beam - Building the WB2HOL foxhunting beam antenna

WB2HOL RDF Projects - A collection of useful and interesting projects for the RDF enthusiast by Joe WB2HOL

WB6BYU Tape Measure Yagi - A tape measure yagi antenna for 145.000 MHz suitable for ARDF

WD4BIS project pages - ARDF projects and info