Amateur Radio Direction Finding: Transmitter Hunting Basics

Showing posts with label Transmitter Hunting Basics. Show all posts

Fox Hunt Amateur Radio Attenuator

Contacted John for our City Group buy #10 / 20 ++

#va3yyz

🦊 - https://twitter.com/ve3wzw/status/1447252378437160960?s=21

🚫 🚷❌⛔️ - identify/terminate 🔫 the rabid dog(s) disrupting amateur radio 🦊 Toronto Canada

#attenuator 🦊 #foxhunt #jamming #Toronto #Canada #hamradio #amateurradio #ve3wzw #va3yyz

Transmitter Hunting - Radio Direction Finding Simplified

https://amzn.to/2X4MR0k

A must have. dated but wonderful.

2 Meter Ham Radio Fox Hunt

Fox Hunting Offset Attenuator Kit

The Art and Science of Radio Direction Finding (RDF)

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)

Transmitter Hunting Basics

A look at Transmitter Hunting as if done like an old Newsreel.

ARDF (Fox Hunting)

Update ::
We now have a GITHUB collaborative group
https://github.com/HAMradioCanada/RDF-Drone/issues

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.

Radio Frequency Direction Finder

Radio Frequency Direction Finder

http://youtu.be/ZUqzdrB1o2U

DSP-RDF Doppler Radio Direction Finder Kit

DSP-RDF Doppler Radio Direction Finder Kit

This kit is based upon the N0GSG DSP Doppler featured in the November 2002 QST Magazine. Doppler RDF units determine the bearing to a signal's source by electronically rotating four antennas, arranged in a circular pattern, at a high rate of speed. The signals received at each antenna are combined and passed on to your FM receiver which is tuned to the frequency of interest. The FM receiver detects the incoming signal and produces an audio tone which is then passed back to the Doppler unit. Inside the Doppler unit are two microprocessors which control the antenna switching and process the audio tone, from the receiver, using DSP techniques. The result of this processing determines the relative direction to the signal source. The direction is displayed continuously in real-time on a circular array of 16 LEDs, each representing 22-1/2 degrees of angle. In the case of intermittent signals the microprocessors save and display the last directional information (shown as a flashing bearing indicator) until the signal is again active. Active signals are displayed as a steady directional indication. The DSP-RDF Doppler kit being offered by W6DFW incorporates another feature not in the original design. This feature allows direction finding of a jamming signal even when the jammer is broadcasting a tone intended to interfere with Doppler units.

SHTF Intro To Radio Direction Finder "Seek & Destroy"

SHTF Intro To Radio Direction Finder "Seek & Destroy"

Real life radio direction finding. Taking this teachable moment to demonstrate various gear & techniques in radio direction finding. Not a gear review, but a concept video of the subject.

Radio Direction Finding Networks

Radio Direction Finding Networks

Pacificon 2012 Presentation given by Marcel Stieber, AI6MS, Graduate Student at California Polytechnic State University.

PA3BNX Super Simple Sound Doppler Finder

PA3BNX Super Simple Sound Doppler Finder

PA3BNX Super Simple Sound Doppler Finder. Homebuild VHF/UHF DSP Direction Finder connected to the soundcard off the PC. Easy to connect to line input of ...

www.pi4wag.nl/projecten/doppler-peiler-radio-direction-finder

https://verbed.home.xs4all.nl/hamspace/pa3bnx/sounddoppler/Flyer%20Doppler-UK2.pdf

Software for radio direction finding equipment

Software for radio direction finding equipment.
https://github.com/KN6FW/AHHADoppler

Free RDF software

Free RDF software

Super Simple Sound Doppler

Lodewijk, pa3bnx developed very nice software for this. It can plot the bearing directly on a electronic map if you want, and with GPS data it can plot and refresh your own location on the map as well. At december 31st 2013 I spoke to Lodewijk and explained my new idea to add a elevation indicator to the RDF, based on the reduced doppler amplitude on signals with higher elevations. I was waiting for a LED driver IC to build this addition.

Raspberry Pi Zero Amateur Radio Fox Hunting “Pi Fox” Setup

Build Pi Fox - Raspberry Pi For Ham Radio Fox Hunting

Software Setup Video Here: How To Setup "Pi Fox" Software On A Raspberry Pi For Ham Radio Fox Hunting - https://youtu.be/edd9JM0OryQ

(This Software Will Not Work On The Raspberry 2, 3, 4. Mainly Only Works On The Raspberry Pi B And Zero.)

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