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Transmitter Hunting in the San Francisco Bay Area
Fremont, CALIFORNIA
February 2, 2002

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

Story by: Jim-KD6DX
Photographs by: Jim-KD6DX and James-N1DDK
Resized and edited with Thumbs-Plus 4.5
& Photo Shop 6.01
From 2560x1920 to 640x480 and highly compressed (50%).
Nikon CP5000

Last updated: Sunday, February 03, 2002

THE FOX
Ron N7TVE the Fox.
Ron-N7TVE

PARTICIPATING HUNTERS
Henry KF6PCEJoan KF6QGJBill KF6QGKJim KD6DX




Henry-KF6PCE, Joan-KF6QGJ, Bill-KF6QGK, Jim-KD6DX,
James-N1DDK, Andy-WD6CJK, Dave-KG6ACD, Greg-KD6NNM, Matt (not pictured),
Gary-WD6YRU, Aileen, Rich-KN6FW, Chris-KF6VFU,
Pete-N6YIF, Linda, Dan-KO6YG, Ian-KO6YQ, Bryan-KF6ZEO.

 

Participants

Fox: Ron - N7TVE

TEAMS (10)

Mileage

Place

Henry-KF6PCE, Joan-KF6QGJ, Bill-KF6QGK 4.0 1st
Jim-KD6DX 4.5 2nd
James-N1DDK and Andy-WD6CJK 5.0 3rd
Dave-KG6ACD 5.5 3rd 10% rule
Greg-KD6NNM and Matt 9.0 4th
Gary-WD6YRU and Aileen 10.0 5th
Rich-KN6FW and Chris-KF6VFU 11.6 6th
Pete-N6YIF and Linda    
Dan-KO6YG    
Ian-KO6YQ and Bryan-KF6ZEO    

 

radio direction finding
163841 (Ron-N7TVE)
ardf
163911 (Chris-KF6VFU)

Saturday, February 2, 2002, 5:00 PM, Fremont, California.

Ten (10) teams participated in Ron-N7TVE's hunt of three transmitters. Mileage to the Hard transmitter counted to win.
1) First and Hard transmitter, 146.490 MHz.
2) Second and Easy transmitter, 146.415 MHz.
3) Last, an intermittent Jammer hunt, 147.540 MHz.

Initial bearings to the first two transmitters were full of reflections and very difficult to read. Using my Arrow 4-element beam, I was able to eliminate all weaker directions and read the strongest signal within 45* of the proper direction. My bearing to the Hard fox wasn't too bad.


Overall initial bearing Map

Track to the Hard Fox.

Track to the Easy Fox.

Track to the Jammer.
I changed  my AHHA Doppler's Filter parameters again, using a 'QFIL' of, 2 / 9 / 9. This seemed to work better than my previous setting of, 2 / 10 / 10. The new setting was definitely more responsive and didn't seem to affect the accuracy much.

The responsiveness hunting the Jammer transmitter was a little on the slow side, I would recommend not using the filter but, just the raw, non-filtered mode.

Rich-KN6FW is currently working on a better FILTER algorithm for the AHHA Microfinder. Since the Microfinder is software (ROM) updateable, I'll be very interested in upgrading.

164133.jpg
164133
164152.jpg
164152 (Rich-KN6FW)
164321.jpg
164321
164703.jpg
164703
Equipment I used to find the transmitters:

1) Arrow 4-element two-meter beam.
2) Arrow Attenuator.
3) Magnetic Compass.
4) Protractor.
5) Laminated Maps.
6) Garmin StreetPilot-III, GPS street level mapping.
7) Doppler, AHHA Microfinder.
8) U-R-Here radio, Icom R3.
9) Mobile Tri-Band Amateur radio. Listening to all channels.

164718.jpg
164718
165222.jpg
165222 (Greg-KD6NMM)
165343.jpg
165343
165526.jpg
165526
Once off the Start Point Hill, my Doppler continued to point in a good direction towards the Hard Fox. Thanks to the QFIL Filter, the Doppler only pointed in the correct direction.

I was directed to turn left on Warm Springs Blvd, drive South and then turn left again onto Scott Creek Rd. What a dream this Doppler has become. I was originally going to drive South on 880 towards Hwy-237 (because of some other hunter's initial bearings) but, the Doppler insisted I should turn left on Warm Springs Blvd. and follow the pointer.

I ended up driving straight (without errors) and right up to the Hard Fox.

165541.jpg
165541 (Dan-KO6YG)
171146.jpg
171146 (Ian-KO6YQ)
172128.jpg
172128 (Pete-N6YIF)
 
175055.jpg
175055 (Hard Fox Location)
174917.jpg
174917 (Hard FOX)
As you can see, I chose to ignore the 'KEEP OUT' sign, driving past it and located the Hard Fox chained to a fence post, some distance within this private property.

Normally, transmitters should not be located on private property.

1810JL.jpg
Photo by James Lee
181013.jpg
181013 (Easy FOX)
The Easy Fox (2nd transmitter) was also located within a CLOSED park. This was a 'No-No' too. Of course, as an avid T-Hunter, I drove on through and located the Easy Fox chained to a light pole.
185055.jpg
185055 Dave-KG6ACD
185107.jpg
185107 Ron-N7TVE
The Jammer hunt was a little more difficult for me. I drove around the area way to much before I found him.

Dave-KG6ACD apparently drove right to the Jammer Fox, parked on the upper level of Ohlone College.

185329.jpg
185329 Andy-WD6CJK
185334.jpg
185334 James-N1DDK
James-N1DDK and Andy-WD6CJK did an excellent job and found the last transmitter (Jammer Fox).

James mentioned while at the Easy Fox (2nd transmitter), he saw multiple "FLASHES", as if someone were taking pictures (that was me taking pictures) and drove up to the College to investigate. James and Andy, your very smart.

I took a picture of Ron-N7TVE's (Jammer Fox) view from the College. Very nice.

185421.jpg
185421
185807.jpg
185807 (View from Ohlone)
1858JL.jpg
Photo by James Lee
190226.jpg
190226
Thanks to James-N1DDK for taking a picture of me taking pictures.
191655.jpg
191655 Rich-KN6FW
191857.jpg
191857 Gary-WD6YRU
Hunters began arriving.
192124.jpg
192124 Henry-KF6PCE
193133.jpg
193133 Ron-N7TVE
 
201841.jpg
201841
Dinner was held at the Famous, Mission Pizza on Washington Blvd.

See you at the next transmitter hunt. (Schedule)
Jim Sakane (KD6DX)

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