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Transmitter Hunting in the San Francisco Bay Area
Pack-A-Lunch Hunt
March 29, 2003

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

Story by: Jim-KD6DX
Photographs by: Jim-KD6DX
Resized and edited with Thumbs-Plus 5.01
& Photo Shop 7.01
From 2560x1920 to 800x600 and highly compressed (50%).
Nikon CP5000

Last updated: Sunday, November 30, 2003

PARTICIPANTS
FOX

Rich - KD6VCQ

HUNTERS

ardf, Bob Cooley KF6VSE
Jim  KD6DX, transmitter hunter.Rich KN6FW, transmitter hunt master.Chris KF6VFU, radio direction finder.
Andy N6AIM, Sacramento, radio direction finder.Mary, with Andy N6AIM.Bill K6TYO. Transmitter hunter.
Henry KF6PCEJoan KF6QGJBill KF6QGKMike KG6MLL, new transmitter hunter.Chris, new transmitter hunter.

Bob-KF6VSE
Jim-KD6DX, Kathleen-N6DOB, Rich-KN6FW, Chris-KF6VFU
Andy-N6AIM, Mary, Bill-K6TYO
Henry-KF6PCE, Joan-KF6QGJ, Bill-KF6QGK, Mike-KG6MLL, Chris.

 

Participants

Fox: Rich - KD6VCQ

TEAMS (7)

Mileage

Notes

Bob - KF6VSE 140.5 1st
Jim - KD6DX and Kathleen - N6DOB 150.2 1st 10% rule
Rich - KN6FW and Chris - KF6VFU 153.1 1st 10% rule
Andy - N6AIM and Mary 172.4 2nd
Bill - K6TYO 204.5 3rd
Henry-KF6PCE, Joan-KF6QGJ, Bill-KF6QGK Started from Pioneer
Mike - KG6MLL and Chris New hunter.

 

0map1.gif
Initial bearing
0map2.gif
2nd Bearing

EQUIPMENT I USED

1) Arrow 146-4-II, Four element yagi.

2) VK3YNG Sniffer MK4, I used it for all my bearings. Additionally, I used the MK4 as my U-R-Here radio which displayed my progress towards the fox exceptionally well. The MK4 was used as a close-in sniffer as well.

4) Compass. Magnetic compass was used to take bearings.

5) Laptop Computer. Used to plot all my bearing onto a TOPO map.

5) AHHA MicroFinder Doppler, Worked okay.

6) Standard C5900DA, Mobile tri-band radio. Any mobile radio will do, as long as you can listen to the FOX and TALK-IN frequency. I use my mobile radio as a distant U-R-Here radio and switched to my Sniffer MK4 when I got close. The MK4, attenuation level-6 seems to be the magic number this time, to stop and walk.

7) Garmin StreetPilot-III. Street level mapping helped me find streets I was not familiar with, as well as the plot the shortest distance to the Fox

0map3.gif
Close-in bearings
0map4.gif
The Fox
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STORY

As you can see from my maps pictured above, I read an initial bearing of 45*, only 5* off from the actual bearing of 40*. My second bearing was still 5* off but, north of the actual transmitter.

Sometime during the hunt, Rich-KD6VCQ had lowered the 40-watt transmitter to 4-watts to save on battery power. As I arrived to within 1/2 mile of the FOX (1:20 PM), I read my 3rd bearing almost over the transmitter. I started to drive towards the Fox when Rich-KD6VCQ raised the transmitter power back to 40-watts to help the others who were still pretty far away. I suddenly realized that power can really really raise havoc with reflections.

I drove all around the place, looking for the Fox, getting bearing from all directions. Around 3:30 PM, two tow truck that had been hiding the entrance to a small driveway moved away. As I drove up the driveway, my MK4 climbed up to level-6 (it never reached above level-5). I read these signs "No Trespassing, KEEP OUT" and decided to keep looking elsewhere. Kathleen told me to drive up the small driveway because of the high readings on my MK4 but, I didn't listen to her. What a mistake. If you own one of these Sniffer MK4's, you better start walking and looking when it display's level 6 (your 110 feet from the transmitter) or higher.

After exhausting my options, looking for the transmitter in different area's, I headed back to the area where my MK4 read level-6 and crossed the signage barrier. I should have done this 1/2 hour ago. Rich-KD6VCQ, Bob-KF6VSE, Henry-KF6PCE, Joan-KF6QGJ and Bill-KF6QGK were all sitting around, waiting for the hunters.

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If you look at the close-up photograph of the water tower, you will see a red 2-meter beam pointing straight at the metallic water container. Rich-KD6VCQ effectively bounced all the transmitters signal in all directions, hiding the main signal source behind the water tower.

What a good hunt. The longer we hunt, the harder they get. I relearned, rule #3, "Trust your Equipment".

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Rich-KD6VCQ lowered the power again to 4-watts and later moved the transmitter to the driveway entrance helping hunters find the Fox.
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EQUIPMENT LINKS to the MANUFACTURE

I think the best piece of equipment I own, is the Sniffer MK4. I use it to get quick and accurate bearings (with my 4-element Arrow beam), as well as my U-R-Here radio to determine how close I'm getting to the transmitter.

Web link for the SNIFFER MK4
Click here, for
the SNIFFER MK4 web site.

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Send mail to jim@thunt.org with questions or comments about this web site.
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