Technical

Transmitter information:

Classic 2M Transmitters

  • Carrier frequency – 144.525 MHz
  • Frequency stability better than 50 ppm
  • Channel spacing between simultaneously working transmitters more than 200 kHz
  • Effective Radiated Power (ERP) .75 Watts
  • Homing Beacon – Frequency – 145.565 MHZ
  • Mode A2A (keyed carrier modulated by AF tone or continuous carrier modulated
    by keyed AF tone)
  • Keying speed 8 … 15 WPM
  • Antenna polarization horizontal
  • Antenna height 2 … 3 meters above ground level

Classic 80M Transmitters

  • Carrier frequency – Actual Frequency 3.5795 Mhz
  • Frequency stability better than 50 ppm
  • Channel spacing between simultaneously working transmitters 30 kHz minimum
  • Output RF power approximately 3W
  • Homing Beacon – Frequency – 3,545 MHZ
  • Mode A1A (keyed unmodulated carrier)
  • Keying speed 8 WPM
  • Antenna vertical

Sprint Transmitters

  • Transmitters with a lower output power 3W Watts shall be used in the sprint competitions.
  • The beacon (B) and the spectator control (S), if this differs from the beacon, shall operate continuously on the frequencies different from the other transmitters and from each other.
  • Two sets of five transmitters shall be used in the sprint event. Transmitters groups 1 to 5 and 1F to 5F shall
  • operate on different frequencies and with different keying speeds.
  • Example of frequency and keying speed assignment:
  • Slow Transmitters – 8 WPM
  • Frequency – 3.579 MHZ
  • Fast Transmitters – 12 WPM
  • Frequency – 3.510 MHZ
  • Antennas – Vertical
  • Mode A1A (keyed unmodulated carrier)

FOX-O Transmitters –  Specifications for the 3.5 MHz transmitters:

  • Carrier frequency – 3.5795 MHZ
  • Frequency stability better than 50 ppm
  • Channel spacing between the homing beacon and other transmitters 30 kHz minimum
  • Homing Beacon Frequency – 3.545 MHZ
  • Undesired products level conforming to the national regulations
  • Output RF power (finish beacon) 1 … 5 W
  • Output RF power FOX-O beacons (other transmitters) 10 mW
  • Mode A1A (keyed unmodulated carrier), Pulse Beacon
  • Antenna (finish beacon) vertical
  • Antenna FOX-O Beacons – single vertical wire approximately 50 cm long

Map information:

  • Diamond Oaks – 2M Training
    • Scale – 1:5000
    • Contour Interval – 3 Meters
    • Map Size – 8.5 x 11 inches
    • Orientation – Portrait
  • Pyramid Hill – 80M Training
    • Scale – 1:7500
    • Contour Interval – 2.5 Meters
    • Map Size – 8.5 x 11 inches
    • Orientation – Portrait
  • Harbin Park – Sprint & FoxOR Training
    • Scale – 1:7500
    • Contour Internal – 5 Meters
    • Map Size – 8.5 x 11 inches
    • Orientation – Portrait
  • England-Idlewild Park – Sprint Event
  • Mitchell Memorial Forest – FoxOR Event
    • Scale – 1:10000
    • Contour Interval – 5 Meters
    • Map Size – 8.5 x 11 inches
    • Orientation – Portrait
  • Miami Whitewater forest – Classic 2M & 80M Events
    • Scale – 1:10000
    • Contour Interval – 5 Meters
    • Map Size – 11 x 14 inches
    • Orientation – Portrait

 

Course information: