FoxRex-144 Foxoring Receiver

FoxRex-144 FoxRex-144

Similar to the well know 80m receiver Foxrex-3500 (see below) the VHF foxoring receiver FoxRex-144 offer a great solutuon for VHF fox hunting. The receiver is built into a solid aluminium profile, which at the same time functions as the boom for three antenna elements. So the antenna is a three element Yagi antenna with good directionality, suitable for direction finding on 2m (144 MHz). The element construction follows an idea of WB2HOL and are made from flexbile steel tapes, in fact they are recycled tape measures. This makes the antenna nearly undestructible and extremely lightweight.

The central antenna boom houses the receiver, an LC display, the rechargeable battery and all controls. A coaxial DC connector is used for charging the battery with a 12 V supply. This is very useful, because you can recharge the battery while driving in your car to the foxoring competition. A 3.5mm headphone plug serves as an On/Off switch, i. e. operation is only possible with a headphone (32 Ω).

All operating controls of the FoxRex-144 are arranged in a well thought out layout: easy to reach and not to interfere with operation while on the chase to the transmitter site. An LC display with a size if 2x8 characters shows frequency, timer, the current transmitter and many other details. A slide switch selects the mode: normal operation, attenuator operation, menu programming. A rotary encoder with push button serves as main control for the menu settings. On the side a separate volume control is located. A small microprocessor controls the receiver functions, i. e. frequency, timer, alarms and so on. It supports various foxoring modes, as they are used in official international competions around the amateur radio world.

The receiver itself is a superhet design with 107 MHz IF and a quartz filter. A quartz controlled PLL is used for sufficiently precsie frequency control, the frequency range is from 143.9 to 148.1 MHz. The sensitivity is 0.1 µV, absolutely sufficient for the ranges used at regular foxoring events. An adjsutable attenuator helps in close range detection of the transmitter. The signal strength is show as a bar graph in the LC display and also presented as an acoustic signal in the headphone. The processor can be calibrated in respect to the transmitter output power, with this calibration a rough distance estimation is made. Depending on the selected competion mode (European style, chinese style etc.) up to 11 frequencies for different foxes can be stored. The built in battery supports the receiver for about 30 hours, an automatic power down mode prevents accidental deep discharge. The weight of the Foxrex-144 is only 530 g.

Order No.
FOXREX-144 FoxRex-144 Foxoring Receiver VHF 485.00 € Add to shopping cart New In stock, shipped in 1 or two days.
Info freight charges
Download: User Manual Foxrex-144 (PDF, EN, 4.6MB)

FoxRex-3500 Foxoring Receiver

FoxRex-3500 FoxRex-3500 ARDF Rx

The FoxRex-3500 is based on the successful 'FJRX85' receiver design by N. Roethe, DF1FO. Consequently the customer can expect a lightweight and solid receiver, which is easy to use, even during a competition event.

The Foxrex-3500 works in the frequency range from 3490 to 3660 kHz (80m band). It can store up to 4 frequencies, the usual fox hunting modes like 'Classic', 'Sprint' etc are supported. A timer reminds the hunter about the approaching end of transmission of a fox. The receiving frequency can be easily adjusted in 100 Hz while on the move.

The receiver is packaged in a solid aluminium case and is shipped with two antennas. The entire setup is robust enough so the hunter can cut through the underwood on a chase, without damaging the device. The FoxRex-3500 is easy to operate, with just two push buttons the receiving direction can be switched for precise 'minimum bearing' direction finding. Optical (LC Display) and audible feedback (headphones) for signal strength and proximity alarm help to adjust the running direction without stopping.

The power supply is donewith a built in rechargeable battery, the manufacturer claims an operating time of about 40 hours. The battery can be charged by a 12 V DC source. This is ver useful because you can charge the receiver in the car. A LED signals the charging state of the battery. A built-in attenuator can be adjusted in 5 dB steps down to -110 dB. The selectivity of the receiver is about -40 dB at 8 kHz, which is absolutely sufficient for an ARDF receiver.

For operation a headphone is required. The manufacturer recommends a stereo headphone with 32 Ω impdance, the connector is a 3.5mm stereo phone plug. A simple headphone is included.

  • FoxRex-3500
  • NUmber of foxes adjustable from 2 to 10
  • 4 memories for frequencies
  • Function lock
  • Adjustable fox beacon time
  • Various ARDF styles: Classic, Sprint, Foxoring, 'Czech' etc
  • Acoustic proximity warning
  • Acoustic S Meter
  • Distance estimation
  • Menu lenaguages: German, English
  • Calibration of battery voltage sensor
  • Calibration of frequency
  • Calibration of the attenuator
  • Automatic power off timer
Order No.
FOXREX-3500 Foxoring/ARDF Receiver 80m 329.00 € Add to shopping cart In stock, shipped in 1 or two days.
Info freight charges
Download: Operating manual Foxrex-3500 (PDF, EN, 4.5MB)
Download: Bedienungsanleitung Foxrex-3500 (PDF, DE, 0.7MB)