[FoxHunt] ARDF Xmitter

[Kuon & Dale Hunt]

Jacques a =E9crit :
...
>I am aving a hard time converting the local Hams from mobile hunts to ARDF,
>that is why I was asking for a fox receiver or a kit or a plan to make one =
to
>ease foot hunting. Also I would like to bring local Scouts in the fun, but
>most, including me do not want to loan our expensive handies or receivers.


   Jacques -

      I suggest 80m to get Scouts and others started on ARDF.
   Equipment is much simpler, less expensive, smaller, and easier
   for smaller Scouts to carry.  80m receivers are usually smaller
   than 20cm x 40cm and weigh less than 500g.  Bearing accuracy
   is good, with few of the problems that plague 2m such as
   reflections and multi-path.

      Any small QRP transmitter circuit will work:  I like the
   "Pippin" circuit from the G3PTO web site, but there are
   many others.  Although 3 - 5 watt transmitters are common
   in Europe, I've had good results with 1 watt (covers up
   to 10km or more with a reasonable antenna.)  Crystals
   for 3579 and 3686 MHz are commonly available.  In fact,
   with a crystal controlled transmitter, the receivers can
   also be crystal controlled, which reduces the expense and
   makes one less control that beginners can adjust incorrectly.

     I've been working with several people on introducing ARDF
   to Scout groups.  We are still in the early stages, but
   hope to get several groups going in the next year or so.

         - Dale WB6BYU