What a learning experience, I started my hunt from Groveland and still
had a very difficult time finding the Fox. I was told getting to
Groveland was the easy part. Isolating the Fox from all the reflections
was the hard part. Thanks Henry-KF6PCE, now I don't feel so bad.
Kathleen-N6DOB and I had a great time looking at all the
scenery. We drove into places we would have never trekked on our own.
Great views of the mountains, natural water falls, boulders on the road,
we even drove high and east enough to see snow on the ground.
Four Wheel Drive and slow mountain traveling used up
all our fuel. We even had to fill-up with gas (last gas before entering
Yosemite) at $2.12 per gallon.
T-Hunting Equipment I Used:
1) SuperDF: To obtain my
initial bearing (125* when it should have been 85*) and for all my other
bearings along the way (some were good but, most were reflections). I
should have used my
Arrow 4-element beam, I was told by Henry-KF6PCE that the beam would
have given me more information about reflections. Since I knew the Fox
was vertically polarized, I could have tested each of my multiple strong
signal directions. Directions which were of equal strength, vertical or
horizontal, would be reflections and the direction with a strong
vertical component would be the direct signal from the Fox transmitter.
MicroFinder Doppler: Using "Digital Filtering" my Doppler pointed to
any strong signal, including reflections. Since most of the time I
received reflections, my display would generally point to these
reflections. I found by turning off my Doppler filter and viewing raw
Doppler directions I could use the 'Human Brain Filter". The Doppler
display would point to reflections for a shorter duration and the true
direction a few moments longer (most of the time). Reflections were also
'Scattered' so the displayed direction was wide. The true direction
seemed to be a narrow displayed direction which stuck moments longer.
Garmin StreetPilot-III: This street and trail level GPS mapping
system worked great, except for plotting all my bearings. I really
needed to plot my (good and bad) dozen or so bearings on a paper map so
I could use my under powered brain to figure out what was good and what
CONCLUSION: Great advanced hunt. Rich-KN6FW should
have been on this hunt but, since he was the Fox, he just had to wait 5
hours for the first hunter to show up.
1) Use a Beam for your initial bearing.
2) Put your Doppler in non-filter mode.
3) Bring any paper map of the area and use it in conjunction with a GPS
trail level mapping system.
James Sakane (KD6DX)