Radio direction finding is used to find sources of interference to any form of wireless electronic communications, including broadcast and two-way radio, television, and telephones. It is also used to track missing or stolen cars and other property. Search and rescue workers use it to find persons in distress. Emergency Locator Transmitters in downed aircraft are tracked with RDF techniques.
The Art and Science of Radio Direction Finding (RDF)
N0GSG DSP Doppler RDF Kit
N0GSG DSP Doppler RDF Kit
Introduction:
Thank you for purchasing the RDF Doppler Radio Direction Finder kit Version
2.0. This kit contains six circuit boards and all the components required to
assemble them.
Enhancements :
Integrated NMEA GPS port. (The GPS is only needed for computerized mapping).
Integrated RS-232 output port ( 4800, 8, N, 1 ).
Standard Agrelo format DF output messages.
Compatible with numerous software packages such as WinAprs, WinDopp ,
APRS+SA , GPSS and others.
Major Features :
Based upon the N0GSG DSP Doppler design as featured in the November
2002 issue of QST magazine.
Utilizes two Atmel Microprocessors, Timing and Antenna switching is managed
by an ATTINY-2313 microprocessor, Signal processing and RS-232 I/O are
provided by another ATTINY-2313 microprocessor. Both are socket mounted to
allow their removal for firmware updates.
Sixteen LED’s furnish relative directional information and also indicate loss of
signal. With resolution of 22.5 degrees.
RS-232 output resolution 3.6 degrees, truncated to its integer value. For example
3.6 degrees is reported as 3 degrees, 7.2 degrees is reported as 7 degrees.
Introduction:
Thank you for purchasing the RDF Doppler Radio Direction Finder kit Version
2.0. This kit contains six circuit boards and all the components required to
assemble them.
Enhancements :
Integrated NMEA GPS port. (The GPS is only needed for computerized mapping).
Integrated RS-232 output port ( 4800, 8, N, 1 ).
Standard Agrelo format DF output messages.
Compatible with numerous software packages such as WinAprs, WinDopp ,
APRS+SA , GPSS and others.
Major Features :
Based upon the N0GSG DSP Doppler design as featured in the November
2002 issue of QST magazine.
Utilizes two Atmel Microprocessors, Timing and Antenna switching is managed
by an ATTINY-2313 microprocessor, Signal processing and RS-232 I/O are
provided by another ATTINY-2313 microprocessor. Both are socket mounted to
allow their removal for firmware updates.
Sixteen LED’s furnish relative directional information and also indicate loss of
signal. With resolution of 22.5 degrees.
RS-232 output resolution 3.6 degrees, truncated to its integer value. For example
3.6 degrees is reported as 3 degrees, 7.2 degrees is reported as 7 degrees.
Introduction to Amateur Radio Direction Finding
Introduction to Amateur Radio Direction Finding
Radio direction finding is a set of skills used to find hidden radio transmitters. Amateur radio operators practice these skills in events called "foxhunts" or "t-hunts". With these skills, they are better prepared to serve their communities in a variety of emergency situations.
Amateur radio clubs worldwide sponsor foxhunts, where individuals and teams compete to find hidden transmitters. Most hunts are open, and clubs welcome new participants. On-the-hunt training and coaching are readily available.
Radio direction finding is a set of skills used to find hidden radio transmitters. Amateur radio operators practice these skills in events called "foxhunts" or "t-hunts". With these skills, they are better prepared to serve their communities in a variety of emergency situations.
Amateur radio clubs worldwide sponsor foxhunts, where individuals and teams compete to find hidden transmitters. Most hunts are open, and clubs welcome new participants. On-the-hunt training and coaching are readily available.
Micro-Fox T-Hunt Transmitters
Byonics - MicroTrak
Micro-Fox T-Hunt Transmitters
Byonics carries these Micro-Fox transmitters for Hidden Transmitter Hunting, also called Fox Hunting, Bunny Hunting, or T-Hunting. These transmitters are small, self-contained, and easy to hide. They are great for on-foot or driving hunts, or as secondary transmitters after people find the primary T. Just conenct to any 2-meter SMA antenna, such as our V2 or V4 antenna, add a battery and configure with your callsign, and hide the transmitter.
Micro-Fox T-Hunt Transmitters
Byonics carries these Micro-Fox transmitters for Hidden Transmitter Hunting, also called Fox Hunting, Bunny Hunting, or T-Hunting. These transmitters are small, self-contained, and easy to hide. They are great for on-foot or driving hunts, or as secondary transmitters after people find the primary T. Just conenct to any 2-meter SMA antenna, such as our V2 or V4 antenna, add a battery and configure with your callsign, and hide the transmitter.
Transmitter or Fox Hunting Class 101 by Byon Garrabrant
I attended the Arizona Repeater Association’s (ARA) February 2014 meeting. They had a guest speaker, Byon Garrabrant, presenting what could be called the definitive lecture on Transmitter Hunting. I have broken the lecture up into 4 parts based on content for easier viewing and reference. In general the 4 parts are:
1. What is Transmitter Hunting
2. Hiding
3. Hunting
4. Closing remarks and High Alt. Balloon Tracking.
There will be a large photo gallery after the videos below if you want to see some items in detail.
I want to thank Byon Garrabrant and the ARA for allowing this content to be distributed publicly for everyone to learn and enjoy.
You can find more about the ARA at their website: http://www.w7ara.org
You can contact Byon Garrabrant or purchase his APRS and Fox Hunting gear from his website: http://www.byonics.com
What is Transmitter Hunting or Fox Hunting All About
I attended the Arizona Repeater Association’s (ARA) February 2014 meeting. They had a guest speaker, Byon Garrabrant, presenting what could be called the definitive lecture on Transmitter Hunting. I have broken the lecture up into 4 parts based on content for easier viewing and reference. In general the 4 parts are:
1. What is Transmitter Hunting
2. Hiding
3. Hunting
4. Closing remarks and High Alt. Balloon Tracking.
There will be a large photo gallery after the videos below if you want to see some items in detail.
I want to thank Byon Garrabrant and the ARA for allowing this content to be distributed publicly for everyone to learn and enjoy.
You can find more about the ARA at their website: http://www.w7ara.org
You can contact Byon Garrabrant or purchase his APRS and Fox Hunting gear from his website: http://www.byonics.com
What is Transmitter Hunting or Fox Hunting All About
What is Transmitter Hunting or Fox Hunting All About
What is Transmitter Hunting or Fox Hunting All About (1 / 4)
You can find more details, links to all 4 videos and a large photo gallery on my blog posting here:
(1 / 4)
More (2 / 4)
You can find more details, links to all 4 videos and a large photo gallery on my blog posting here:
(1 / 4)
More (2 / 4)
Radio DF DDF2020T: GLOBAL TSCM GROUP, INC.
Radio DF DDF2020T: GLOBAL TSCM GROUP, INC.
kn2c.us/
Our new DDF2020T, you do not need to change the antenna to the receiver side even when the power is off. Now it has higher stability by fixing the problem of unstable connection of each base. In particular, the base of the antenna on the roof of the car is made with aluminum so that it does not become rusty. We hope you are satisfied with this product.
kn2c.us/
Our new DDF2020T, you do not need to change the antenna to the receiver side even when the power is off. Now it has higher stability by fixing the problem of unstable connection of each base. In particular, the base of the antenna on the roof of the car is made with aluminum so that it does not become rusty. We hope you are satisfied with this product.
Update ::
We now have a GITHUB collaborative group
https://github.com/HAMradioCanada/RDF-Drone/issues
Doppler Systems Mobile Kit
Doppler Systems Mobile Kit
mobile kit includes antennas for the bands to be covered, the mobile summer, the GPS receiver, the compass (optional), and all the cables necessary to setup and operate a mobile direction finder. All of the equipment is packaged in a foam lined Pelican case. Power cables are provided with cigar lighter plugs. All antenna elements and cables are carried in a custom Mighty Pouch accessory bag. If the processor suite contains a data radio the data radio antenna is also housed in the Pelican case. The figures below show typical a equipment complement. The mobile kit is available in a single, dual, or three-band antenna kit covering 100 MHz - 1000 MHz.
http://www.dopsys.com/products/suites/MobileKit.html
Mobile 100 - 500 MHz AOR SR2200 14 ft none none
To be ordered.
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