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December Family Holiday Fox Hunt, December 27, 2025

Another great year at the Sierra Foothills Amateur Radio Club is nearing an end.  One of the last club events for the year, and holiday tradition, is the December Family Holiday Fox Hunt. 

Yes, our December Family Holiday Fox Hunt, as with most SFARC fox hunts, is on the last Saturday of the month which this year is December 27.  As with most SFARC fox hunts our December Family Holiday Fox Hunt starts at 9:00 AM.

What is so special about the SFARC December Family Holiday Fox Hunt?  As the name suggests, it’s all about making it a family event.  It’s an opportunity, at the time of the year when our members are gathering with family, to bring the entire family out, especially the young ones, to a club event, to a club fox hunt, and show them a piece of what Amateur Radio is about and to have a really fun time doing so with your family and other participants families.

To make the December Family Holiday Fox Hunt fun for your entire family we host it is local park where it becomes a walking fox hunt, no driving required.  We make it as accessible as possible to those with all levels of mobility.  Yet at the same time we make it reasonably challenging and include multiple foxes so there are multiple opportunities to find a fox.  The club has done this for several years now and it been very well received by all who have participated.  And did I mention there will be prizes for the young ones and treats for all?

The December Family Holiday Fox Hunt will be at Regional Park in Auburn, 3770 Richardson Drive which is just a short distance from the intersection of Highway 49 and Dry Creek Road.  We will meet 9:00 AM at the main parking lot near the paddle board courts (38.952465, -121.107092).  There will be a pre-meeting to orientate participants to the layout of the park, details of transmitter frequencies and operations, and explain a few “rules”.  There will also be loaner Fox Hunting equipment for those that need it and SFARC Elmers on hand with Fox Hunt tips and help for those who desire such.

Thanks to our four Fox tenders for this event; Brian AI6US, John KO6COW, Jayden W6EFM and Frank KG9M.

I strongly encourage you to bring the family out and enjoy this event. It is a blast and a wonderful way to wrap up another great year of family and Amateur Radio with the Sierra Foothills Amateur Radio Club.  As Eric Burton sung in the song San Franciscan Nights, “It will be worth it”.

Greydon KC6SLE

 

The Loss of an SFARC Friend

It’s with great sadness that we share the news of another SK. Bill Silva aka. “Colusa Bill” (KA6FKK) passed away on September 20th due to complications from a stroke.

From dialing around 40M and landing on that BIG voice to hearing him participate on nearly all of our nets including the Coffee Break, Given the distance, and being the sole caretaker of his mom, it was hard for Bill to attend many events but he did make a special trip to Hamfest last March to meet Brian and Smitty; it was great to put a face with the voice. 🙂

Bill’s voice, laugh, and calm demeanor will certainly be missed.  As we learn more about his celebration of life, we’ll make sure to share it here.

73 one last time old friend, W6EK

Running A Fox Hunt

Being the Fox Tender is almost as much fun as finding the Fox!

As the club’s RDF abilities improve the creativity in where the Fox  is hidden will likely become equally creative! If you have ideas on challenging the Fox Hunters then SIGN UP!

The Process

  1. Complete the sign-up form
  2. Once confirmed on the calendar arrange to pick up the Foxes from Doug (W2VX)
  3. Select an area to hide the Fox and do some basic testing (to understand coverage area)
  4. Promote the Fox Hunt (Coffee Break Net, Club Calendar, Club announcements i.e. Watts Up)
  5. Run the Fox Hunt and record results and take pictures if you are able
  6. After the hunt return the Foxes to Doug (W2VX)
  7. Write an article for the Club Newsletter!

Available Foxes

The club (Doug – W2VX) maintains several Foxes for Fox Tenders to use. The foxes are pre-programmed and ready to go with the exception of potentially needing new batteries. The available foxes include:

Doug (W2VX) has constructed a high power fox placed in an ammo can. Given the high power output (1-5 watts) this Fox would is most appropriate for longer distance Fox Hunts.

Jon (KI6RT)’s Byonics MicroFox 15 is typically available for club fox hunts (depending on what KI6RT is testing). Others in the club also own this model micro fox.

Foxes from Byonics typically output 15 milliWatts and are useful in parks or smaller areas.

SFARC owns two Byonics MicroFox 15S transmitters.

More questions? Please contact Jon (KI6RT) or Doug (W2VX).

Fox Hunting Equipment

The popular RDF (radio direction finder) techniques used by SFARC include:

  • A version of the Handi-Finder created by Doug (W2VX) and Greydon (KC6SLE). This device switches between two dipole antennas effectively measuring the TOA (time of arrival) that appears as a tone on the HT (handi-talkie). As illustrated on the right the tone will be null (i.e. minimum volume) when the antennas are equidistance from the hidden transmitter thereby providing a vector to/from the hidden transmitter. Once several bearings or vectors have been established and plotted on a map the location of the Fox can be estimated. Mike (K6YMM) presentation on the technique can be found here.
  • Growing in popularity is the Tape Measure Yagi with a variable attenuator (step attenuator or an offset attenuator). The directional nature of a Yagi enables hunters to point straight at the hidden transmitter. As the the Fox Hunter approaches the Fox, attenuation is required (otherwise the HT will be overloaded and the S-meter will not show a peak).
  • The club continues to explore other RDF technologies. Most recently testing the KrakenSDR which uses five coherent receivers feeding data into a RaspberryPI running the MUSIC (MUtiple SIgnal Classification) algorithm. MUSIC is able to estimate DOA (direction of arrival) and together with a android phone displays a heat map and a vector straight to the hidden transmitter!