WD9EYB's Strategy and Tactics of Hidden Transmitter Hunting
WD9EYB's Strategy and Tactics of Hidden Transmitter Hunting
by Jim Osburn, WD9EYB
1/3/2003
- Introduction
Despite that I'm not the best perhaps not even a good
hidden transmitter hunter,
I feel motivated to list some of the tactics and strategy of
hidden transmitter hunting.
- Tactics
- Practice and study hidden transmitter hunting.
- Copy the equipment, strategy and tactics of hunt winners.
- Use an up-to-date map.
- If possible, reconnoiter the area of the hunt ahead of time.
- Make sure all equipment is in good operating condition.
- Make sure all batteries are charged and fresh.
- Show up for the hunt early.
- Check in with hunt organizers.
- Know the rules.
- Be ready for the first transmission.
- Calmly take bearings and note them on the map.
- Make sure you know where you are on the map.
- Don't try to memorize bearings, you will forget and confuse them.
- Decide on the next way point before going to it.
- Walk, run, or drive safely to the next way point.
- Do not violate traffic laws.
- Avoid congested areas.
- Do not trespass.
- Park where it's legal.
- Don't get in the way of pedestrians or vehicles.
- Be courteous at all times.
- Strategy
- Out of Range
- Check the date, time, and locale of the hunt.
- Check the frequency.
- Check your equipment.
- Allow time for hidden transmitters to come on the air
- Are there other hunters that can hear the hidden transmitter?
- Check with hunt organizers for hidden transmitter failures.
- If you know the hunt area, search the area with an omnidirectional
antenna.
- Use a search pattern that will cover as much of the area as
possible assuming minimum hidden transmitter range.
- Don't search too fast, you might miss the signal.
- Very Far Away
- Remove any attenuators between antenna and receiver.
- Move slowly when trying to take a bearing.
- Open the squelch of the receiver.
- If unsure of the bearing, make a guess.
- Moving a short distance won't make much difference in signal
strength or bearing.
- Move a good distance to the next way point.
- Far Away
- Use the minimum amount of attenuation required.
- Move slowly when trying to take a bearing.
- Open the squelch of the receiver.
- Take the best bearing possible.
- Don't triangulate, it takes too long.
- Home in, i.e. follow beam headings, to the hidden transmitter.
- Remember to mark bearings on the map and use the map to
decide on the next way point.
- In multiple transmitter hunts, mark bearings on the map for
the other transmitters. You will need them soon.
- Multipath Trap
- If you're spending a lot of time in one area with confusing
bearings, you might be in a multipath trap.
- One point with a strong signal with no points of strong signal
around it might be just a hot spot. Don't trust the hot spot
bearing.
- Move a good distance to try to get out of the trap.
- Be sure to take bearings at way points with no nearby buildings,
overhead wires, metal fences, or metal poles.
- If you hunt often in the same area, note the locations of
possible multipath traps and where good bearings can be taken.
- Even incorrect bearings due to multipath may still have some
element of truth to them. Average the bad bearings to get
an idea of what a good bearing might be.
- Near By
- Use enough attenuation to give a good bearing.
- If you're using an S-meter, use enough attenuation to give a wide
swing of S-meter. Don't have all the readings near the top or
near the bottom.
- Be aware that multipath may still be a problem. You might
think you're near when you're still far away.
- Use the map and be sure to mark your bearings on it.
- Don't waste time checking hunches.
- Trust your equipment.
- Home in on the hidden transmitter.
- Very Near
- If you're using an offset attenuator you can get more attenuation
by using higher harmonics of the local oscillator.
- You can get good bearings and be just feet away from the
hidden transmitter.
- If you're very close, a field strength meter instead of a
receiver may be appropriate.
- Take a bearing and check your field of vision, the hidden
transmitter could be right in front of you.
- Try to find it with good bearings instead of guesses and hunches.
- Once you have found it, record the information required and
quickly move on to the next hidden transmitter.
You have a hunt to win.
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