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Transmitter Hunting in the San Francisco Bay Area
Fremont transmitter hunt
April 5, 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, September 04, 2005

PARTICIPANTS
FOX
Rich Harrington KN6FWJeff - KD6TOJ
Rich - KN6FW and Jeff - KD6TOJ

HUNTERS

Jim  KD6DX, transmitter hunter.Henry KF6PCEBill KF6QGK
Chris KF6VFU, radio direction finder.

James-N1DDK, Andy-WD6CJK, Don-KD6IRE, Linda-KE6BEO
Jim-KD6DX, Henry-KF6PCE, Bill-KF6QGK, Johnathan-AE6HO, Nicholas-KG6MYQ
Art-KF7GD, Gary-WB6YRU, Terry-KB6EBZ, Chris-KF6VFU

 

Participants

Fox: Rich-KN6FW and Jeff-KD6TOJ

TEAMS (9)

Mileage

Notes

James-N1DDK and Andy WD6CJK 13.7 1st
Don-KD6IRE and Linda-KE6BEO 14.4 1st 10% Rule
Jim-KD6DX 16.7 2nd
Henry-KF6PCE and Bill-KF6QGK 17.1 2nd 10% Rule
Johnathan-AE6HO and Nicholas-KG6MYQ 17.4 2nd 10% rule
Art-KF7GD 22.1 3rd
Gary-WB6YRU 29.5 4th
Terry-KB6EBZ Unknown Terry, email me!
Chris-KF6VFU

 

KD6DX GPS track map to the Hard 1st Fox.
GPS track to 1st Fox
KD6DX
KD6DX close-in GPS track to the 1st hard fox.
1st Fox
KD6DX

EQUIPMENT I USED

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

2) VK3YNG Sniffer MK4, I used it for both my initial bearings. I also used the MK4 as my U-R-Here radio which displayed my progress towards the fox and as my close-in sniffer.

4) Compass. Magnetic compass, for my initial bearings.

5) AHHA MicroFinder Doppler. Helped me fine tune my initial bearings and change directions as needed.

6) Standard C5900DA, Mobile tri-band radio. Listened to both FOXES (scanning). When my mobile radio became S-7, I switched to the Sniffer MK4 and used it as my U-R-Here radio. I learned from last weeks hunt, that I should seriously start looking for the fox when the MK4 reached attenuation level-5 and probably stop when it reached level-6. (I had previously predicted level-7 for my stop point).

7) Garmin StreetPilot-III. Street level mapping helped me find the shortest route along my initial bearing and find streets I was not familiar with. I mentally looked for streets heading along my Doppler bearings.

Equipment Conclusion

The combined pieces of equipment listed above are important however, if I were to pick the single most helpful, it would be the "Sniffer MK4". A good U-R-Here device gave me volumes of information. To know how far the Fox may be is so important. With all the hunting gear pointing in a direction, if you don't have an idea of how far the fox may be, you can't develop a short route to the fox. You begin to check all the side streets and dead-end roads. Your U-R-Here radio doesn't have to be the MK4, as long as it has enough attenuation to get within 10 feet of a 5-watt transmitter without saturating. You should calibrate your U-R-Here radio and keep it consistent. Each hunt will develop your skills and ability to understand what your equipment is telling you.

KD6DX GPS track map to the Easy 2nd Fox.
GPS track to 2nd Fox
KD6DX
KD6DX close-in GPS track map to the easy 2nd fox.
2nd Fox
KD6DX
AE6HO, GPS Track map to the Hard 1st Fox.
AE6HO
GPS track to 1st fox
AE6HO GPS track map to the 2nd Easy Fox.
AE6HO
GPS track to 2nd fox
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Story

The actual bearing to the 1st (Hard) fox was 325*, 11.5 miles out and the 2nd (Easy) fox was 313*, 6.84 miles out.

My bearings were 330* to the 1st fox and 315* to the 2nd fox. I'm getting better or taking more care in reading my initial bearings.

As you can see from my GPS track, I started out on my initial bearing and was on track to have low mileage. As I drove close to Stevenson Blvd., the Fox was blocked by some mountains, giving me some very low signal strengths and reflections from the West. I diverted to Paseo Padre Pkwy (getting away from the hills) and found the fox was still along my initial bearing (if only I followed Rule #1 & #2).

Something I noticed on this hunt, since Fox-1 was so elevated, the signal it sent out was relatively high for a long distance. What I'm trying to say is, my MK4, U-R-Here radio, displayed level-3 from 5-miles away to 2-miles away, before it started to climb in attenuation levels.

I might need to recalibrate my MK4 using a highly elevated transmitter instead of the ground level one I originally used. By my original calibration, a level-3 signal meant the fox was only 1/2-mile away, but since the level-3 didn't change after driving 1-mile, I knew the transmitter was up high and my calibration was going to be off.

Locating the 2nd (Easy) fox was pretty easy. Since I periodically check the direction to fox-2 during the hunt for fox-1, I knew it was west of Paseo Padre Pkwy and south of Thornton Ave.. I just plotted a short route on my Garmin StreetPilot-III and followed my Doppler to the transmitter. See GPS track map to fox-2.

Dinner

Pizza Italia (Real Italian Food)
3701-C Peralta Blvd.
Fremont, CA. 94536
(510) 797-1476

Jim Sakane (KD6DX)

20030405_175935.jpg
1st Fox
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View from 1st Fox
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1st Fox
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2nd Fox
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2nd Fox antenna
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20030405_200624.jpg
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NEXT TRANSMITTER HUNT

Apr. 19, 2003 "Foxes Choice"
BAY HUNT.
(Saturday) at 6:00 PM

Start Point: Anywhere
Talk-in: 147.015+
or 147.045+ PL94.8

Jim-KD6DX will be hiding.
No mileage, just a fun hunt.

20030405_200639.jpg
20030405_200639.jpg

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