Beginning with the 2012 ARDF World Championships in Serbia, two new events are being added; Sprint and Fox-Oring.
The new transmitter's timer is compatible with the earlier SRJ one (Olle Nilsson, SM0KON, MINI-FOX/3.5, 2007, www.pejla.se ) and uses a Montreal Fox Controller.
Twelve transmitters were used and tested in Sprint competitions in Stockholm, April 2012, Hungary: AH Cup, April 2012, the Nordic ARDF Championships 2013, Sweden and also in the Foxoring competitions, Stockholm, 2013.
For the Finnish ARDF Radio Clubs twenty ARDF Sprint/Foxoring 80m transmitters have been built and twelve for the Hungarian MRASZ(2014). One set of the transmitters has been tested in the Hungarian Sprint and Foxoring Championships 2014 as well as in Stockholm.
The modified Montreal Controller allows the PIC to be programmed and then tested without having to remove the PIC16F628A.
1958 I started my ARDF "career" constructing and competing with a 144 MHz super-regenerative receiver using a 6J6 tube in Hungary.
1959 I passed the UHF-VHF examination and got licensed as HG0HK in 1961.
1964 I designed a 144 MHz ARDF receiver using 2SA229 transistors.
1968 We designed a TTL controlled timer for ARDF transmitters using prototype ICs from Texas Instruments. We built 500 of them for ARDF Clubs in Hungary. The timer and 3.5 MHz transmitter was published in Radiotechnika, 1971 (in Hungarian).
1973 7th European/IARU R1 ARDF Championships in Hungary
Transistorized, automatically controlled fox transmitters, published in Radiotechnika, 1971 7/8 were used. The five foxes called MOE up to MO5. Remarkable is the statement in Funkamateur 1973/11, and DL-QTC 1973/12, that the five foxes worked, both at 80 m and 2 m, all on the same frequency. Only the finish beacon (MO) that was constantly in the air worked on a different frequency. The transmitters had a time control which was derived from a crystal oscillator with TTL frequency dividers, and shift registers. Also the call signs were transmitted automatically.
1986 I won Individual and Team silver medals in the 144 MHz competition in Yugoslavia, 3rd World ARDF Championships.
2008 Team leader and competitor in the Hungarian ARDF team; 14th World ARDF Championships, Korea ARDF.
2010 16th World ARDF Championships, Croatia; competitor in the Swedish ARDF team.
2011 Montreal Fox Controllers program written for sprint and fox-oring events for SRJ Club 3.5 MHz ARDF transmitter (Olle Nilsson SM0KON, MINI-FOX/3.5, 2007, www.pejla.se ).
2012 Twelve ARDF 80m transmitters were tested in sprint competitions in Stockholm and in Kecskemet, Hungary.
2012 Team silver medal in the 3.5 MHz competition in Serbia, 16th World ARDF Championships.
2013 Team bronze medal in the 3.5 MHz competition in Poland, 19th World ARDF Championships.
2014 Team gold medal in the 144 MHz, team bronze medal in the 3.5 MHz competitions in Burabay (Kazakhstan), 17th World ARDF Championships.
Courtesy of Jan Hoek, PA0JNH
Table of results of ARDF IARU Championships