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Pack-A-Lunch Transmitter Hunt
Radio Direction Finding
March 19, 2005

Thanks for visiting the San Francisco Bay Area T-Hunting WEB SITE.

Web page and photography by: Jim - KD6DX

Web servers and space provided by: Johnathan - AE6HO

Last updated: Sunday, January 15, 2006

PARTICIPANTS
FOX
Pete N6YIF
Pete (N6YIF)

HUNTERS
Jim Sakane KD6DX Kathleen N6DOB Rich Harrington KN6FW
Jim-KD6DX and Kathleen-N6DOB, Rich-KN6FW

 

Participants

Fox: Pete (N6YIF)

TEAMS (2)

 

 

Time

Jim-KD6DX 11:30 AM
Rich-KN6FW   2:30 PM

 

01map.jpg
Overall Map
02map.jpg
Close-in Map
I started from the 'west' end of Central Ave. in Fremont, California, getting two bearings.
1) 150* with my beam.
2) 175* with my Doppler, when the fox was talking on the input to the talk-in repeater.
*) Actual bearing should have been 159*, 23.3 miles.

Rich-KN6FW started from the Fremont start point on Zapotec Dr. in Fremont.

050319112800_016.jpg
Doppler Setup (KD6DX)
050319113000_012.jpg
Park entry gate
Equipment used:
1) Initial bearing beam (4-elements) with MK4-Sniffer, compass, protractor and laminated map.
2) Laptop running DeLorme Topo maps and a GPS.
3) Garmin SP2610 GPS with street level maps.
4) Doppler Systems, Doppler running in 'Average' mode
5) MK4-Sniffer with radiator mounted antenna for my U-R-Here receiver.
6) MK4-Sniffer with beam (4-elements) to close-in hunt (walking) the Fox transmitter.

For this particular hunt, all I really needed was:
1) Doppler, running in 'Average' mode.
2) Garmin SP2610 GPS with street level maps and routing capabilities.
3) MK4-Sniffer with beam (4-elements) to close-in hunt the Fox transmitter.

With a little more experience, Topo maps would help determine how radio signals (at a distance) travel over elevated terrain and when (close-in) elevated terrain blocks and reflects signals.

Terrain knowledge will determine how to use a Doppler. When to ignore the display and how to average the display pointing to the Fox transmitter. I noticed, reflections did not allow the Doppler display to stick.

Jim Sakane (KD6DX)

050319113100_011.jpg
Overlook
050319113200_010.jpg
Kathleen N6DOB
050319113705_001.jpg
Fox Transmitter
050319113742_007.jpg
Fox Antenna
050319124028_017.jpg
Pete-N6YIF, the Fox.
050319133257_020.jpg
Rich - KN6FW
 
050319133551_022.jpg
Pete with Sniffer
050319133818_024.jpg
Rich finding Fox
 

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