Questions tagged [direction-finding]
Questions related to fox hunting (chasing in some areas) and radio direction finding.
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How would a time-difference-of-arrival receiver with two antennas know which side the signal is from?
An easy TDOA design by Byonics was published with the following schematic:
It appears that the antennas are switched at a rate of 640Hz, which allows a 640Hz tone to be heard in the radio when the ...
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How to make a "you're getting warm/cold"/"fox hunting" game based on RF signals
I would like to build a system in which the emitter emits omnidirectional RF signals, and the receiver gets a stronger signal (it does not have to be accurate) with a) closer distance from the emitter ...
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Why are Wullenweber CDAAs obsolete?
Wullenweber circularly-disposed antenna arrays (CDAAs) are large HF direction-finding antennas, sometimes colloquially referred to as "elephant cages", that were popular in the Cold War. They allowed ...
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Direction finding: How to find a stuck FM transmitter on 70cm?
There's a blank carrier on a 433 MHz FM voice frequency here. How should we go on about finding the transmitter's location? Practical procedure? Could be somewhere downtown.
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Is FM appropriate for foxhunting?
I'm thinking about an inexpensive way to create a foxhunt kit for youth groups, and am wondering if the cheap dual band HTs could be used.
However, it occurs to me that FM doesn't provide any good ...
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QRN: How to chase down a solid S9 noise floor on 40m only
I am new to this, having just set up my station. I have "very bad" QRN on 40m: S9. Here is the setup:
High density suburb with flats and houses
Yaesu FT450D with fan dipole at 6m-9m above ...
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antenna circuit to hear or show radio direction
Is it possible to create a circuit to hear (through earphones) or show (with an LED) the direction of a radio source? What does a really simple circuit look like and how does it work? How does the ...
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