Transmitter Hunt Practice Saturday 9/21

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Weather Update

Despite rain in the morning, the activity is go for a 1:00 PM start time.

Details

There was a lot of interest in the hidden transmitter hunt last week. At our monthly meeting, there were requests for a program on the final few meters of searching, covering both theory and practice. Accordingly, at 1:00 PM CDT on Saturday, September 21st we will have a hidden transmitter hunt (2-meter) practice session in Tarnhill Park (98th St. and Little Rd.) in Bloomington. The practice session will focus on on-foot techniques and relatively simple equipment. Bring what transmitter hunting equipment you have; there will be some extra gear available for use.

This is a fair-weather activity, and a final go/no-go decision will be made by 7 AM CDT on Saturday 9/21 and propagated on the BARA website post for this event.

Techniques

  • Built-in attenuator
  • Polarization
  • Third (and other) harmonic hunting
  • Slight frequency offsets
  • Body fade
  • Triangulation
  • Hunting with an omnidirectional antenna
  • Step attenuators (PDF)
  • Offset attenuators

Frequencies:

  • 146.565 MHz transmitter
  • 439.695 MHz 3rd harmonic
  • 293.130 MHz 2nd harmonic
  • 147.090 MHz (+600 kHz, no tone) voice repeater

Updates:

Go/No-go weather decision has been made, activity is go for 1:00 PM start time.