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The RX80M is the second generation of the popular directional foxhunt receiver designed by Les Tocko VA7OM and produced by Dave Miller VE7HR. $125 CAD.
The RX80M receiver tunes 3.51 MHz to 3.60 MHz and is ready to use, complete with 9v battery, antenna, earbuds and internal 100 dB attenuator. Sensitivity is 0.4 uV for 10 dB signal to noise ratio. Price: $125 plus shipping.
Now also available TX80M – fully programmable 80 m transmitter …$97 CAD
Hang it from a branch and let the counterpoise dangle down or trail along the ground.
The new TX80M is a highly configurable transmitter with the following features:
• Configurable using a serial terminal through the USB port on a PC
• Configurable call sign identification, CW speed and repetition frequency
• Adjustable fox number from 1 sending “MOE” to 5 sending “MO5”
• Configurable transmission modes
o Standard (10wpm, on 1 min, off 4 min)
o Alternate (10wpm, on 1 min, off 1 min)
o Sprint (10wpm, on 12 s, off 48 s)
o Fast sprint (15wpm, on 12 s, off 48 s)
• Beacon mode sending “MO” at 10wpm continuously
• Spectator mode sending “S” at 15wpm continuously
• Low battery mode sending MOx once every 5 minutes
• Start of event timer configurable up to 120 minutes
• Start button to synchronize multiple foxes
• Optional short pre-event transmissions one hour before the event start with configurable CW
• Flashing LED showing status
o waiting to begin delayed start – rapid flashing
o running – on continuously
o CW transmissions – flashing with CW timing
• Debug mode providing progress reporting via the terminal
Frequency: 3.579 MHz
Range: 300 m
To order the RX80M or TX80M, contact JohnVA7XB@gmail.com.
More information: www.RX80M.com
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The popularity of 80 m foxhunts is increasing due to the better directional characteristics (with less reflections) of 80m versus 2 m
To Use the RX80M: Determine the general direction of the fox with the RX turned broadside while pressing the button, then home in precisely on the null with RX turned sideways. An instructional video describing this technique can be seen at https://youtu.be/YK3gETNc2jU.