Home
Up
Pleasanton 10/21/06
Sonora 9/30/06
Fremont 8/5/06
Foster City 6/17/06
San Mateo 6/3/06
Walnut Creek 5/20/06
San Jose 5/6/06
Moraga 4/29/06
Pleasanton 4/15/06
Livermore 3/18/06
CastroValley 3/4/06
Richmond 2/18/06
Fremont 2/4/06
Los Gatos 1/21/06
Fremont 1/7/06
Sonol 12/3/05
Pollock Pines 11/19/05
Carmen City 10/29/05
Pleasanton 10/16/05
Fremont 10/1/05
Santa Clara 9/17/05
Milpitas 9/3/05
San Leandro 8/20/05
Nevada 7/30/05
Mt.Hamilton 7/16/05
Clayton 6/18/05
Pleasanton 6/4/05
RedwoodCity 5/21/05
Fremont 5/7/05
San Andreas 4/30/05
Orinda 4/16/05
Fremont 4/02/05
Mt.Umunhum 3/19/05
Palo Alto 3/5/05
Fremont 12/04/04
Hunt Oct 02, 2004
Hunt Sep 18, 2004
Hunt Aug 7, 2004
Hunt Jul 31, 2004
Hunt Jul 17, 2004
Hunt Apr 17, 2004
Hunt Apr 3, 2004
Hunt Mar 20, 2004
Hunt Mar 06, 2004
Hunt Feb 21, 2004
Hunt Feb 7, 2004
Hunt Jan 3, 2004
Hunt Nov 29, 2003
Hunt Nov 15, 2003
Hunt Sept 6, 2003
Hunt Aug 16, 2003
Hunt Aug 2, 2003
Hunt July 19, 2003
Stump the Stars II
Hunt June 7, 2003
Hunt May 17, 2003
Hunt May 10, 2003
Hunt May 3, 2003
Hunt Apr 19, 2003
Hunt Apr 5, 2003
Hunt Mar 29, 2003
Hunt Mar 15, 2003
Hunt Feb 1, 2003
Hunt Jan 18, 2003
Hunt Jan 4, 2003
Hunt Dec 21, 2002
Hunt Dec 7, 2002
Hunt Nov 30, 2002
Hunt Nov 16, 2002
Hunt Nov 2, 2002
Hunt Oct 5, 2002
Stump the Stars I
Hunt Sep 7, 2002
Hunt Aug 31, 2002
Hunt Jul 20, 2002
Hunt Jun 29, 2002
Hunt Jun 15, 2002
Hunt Jun 1, 2002
Hunt May 18, 2002
Hunt May 5, 2002
Hunt Apr 20, 2002
Hunt Mar 30, 2002
Hunt Feb 16, 2002
Hunt Feb 2, 2002
Hunt Jan 19, 2002
Hunt Jan 5, 2002
Hunt Dec 29, 2001
Hunt Nov 17, 2001
Hunt Nov 3, 2001
Hunt Oct 20, 2001
Stockton Oct 13, 2001
Hunt Oct 6, 2001
Hunt Sept 29, 2001
Hunt Sept 15, 2001
Hunt Aug 18, 2001
Hunt Aug 4, 2001
Hunt Jul 21, 2001
Hunt June 16, 2001

Radio Direction Finding
Challenge Fremont Transmitter Hunt
Starting from Fremont, California
Aug. 20, 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, August 21, 2005

PARTICIPANTS
FOX
Don KC6IPO
Don - KC6IPO

HUNTERS
Jim Sakane KD6DX

Ron-N7TVE, Jim-KD6DX
Bob-KF6VSE, Chris-KF6VFU, Don-KD6IRE, Linda-KE6BEO, Gary-WB6YRU

 

Participants

Fox: Don - KC6IPO

TEAMS (6)

MILEAGE/Time

PLACE

Ron-N7TVE 60.2   3:15 PM 1st
Jim-KD6DX 60.2   3:15 PM 1st
Bob-KF6VSE
Chris-KF6VFU
Don-KD6IRE and Linda-KE6BEO
Gary-WB6YRU

 

001map.jpg
Overall view of my GPS Track
002map.jpg
Close-in view
Hunt date: Aug. 20, 2005
Starting: 1:00 PM from the Fremont start point.
One (1) hidden transmitter on 146.415 MHz. 3 watts into a 19" whip, on the ground, using a trash dumpster as a reflector and facing So. San Francisco.
Scoring method: Mileage.
The hider was Don-KC6IPO.
The winners were Ron-N7TVE and Jim-KD6DX.

My initial bearing was 300* and the actual bearing was 313*.

Once off the Start Point Hill, I did not hear the Fox, even as I passed by it on Hwy-880.

With a "hint" from the Fox, "The Fox is South of Oakland, North of Fremont and in Alameda County", Ron-N7TVE and I met up in Oakland and were able to re-think a plan to find the Fox.

We took Hwy-580 south because it was elevated and began hearing the Fox in the area of San Leandro / Castro Valley. We took another bearing from the Animal Shelter and acquired a direction over the San Leandro Marina.

The signal from the transmitter was less than "1" S/Unit, at best, until we were within a mile of the Fox. Then the signal began to ramp up very rapidly.

Jim Sakane (KD6DX)

050820_132030-021.jpg
050820_132030-021.jpg
050820_132043-022.jpg
050820_132043-022.jpg
050820_132108-023.jpg
050820_132108-023.jpg
050820_132401-024.jpg
050820_132401-024.jpg
050820_151808-026.jpg
026 Fox, Reflected towards So.San Francisco
050820_152054-031.jpg
050820_152054-031.jpg

 
Equipment Used:
1) Arrow, 4-Element 2-Meter Yagi.
2) VK3YNG, VHF Sniffer MK4. 2-Meter Receiver and U-R-Here radio, with built-in 10-step attenuator.
3) Doppler Systems, Doppler, with an Icom R10 Receiver, modified for RSSI S-Meter Indication.
4) Garmin, 2610 GPS and Maps.
050820_152829-035.jpg
035 Fox, Don-KC6IPO
050820_152841-036.jpg
036 Ron-N7TVE
Bob-KF6VSE wrote:
From the top of the hill (415ft) at Fremont I got very weak vertical and a much stronger but broader horz. signal from the San Burno Mt.  I concluded he must be blocking the vertical somehow and the horz. was being helped and spread across the bay by the flat salt water.  So the source had to be near the waters edge to aid the strong horz.  As I started north on the flat I heard nothing, as expected, so I headed to my secret high point (600ft).  From here I got enough vertical to turn on the first 15db att. and I got a correct bearing within 1 degree. I think I was in the lead at this point.
Time for a big mistake. I decided to cross the bay to Candlestick or Hunters point. The traffic was bad so by the time I realized I was on the wrong side of the bay, and got back on the east side within a few block of the fox, it went off.
Bob KF6VSE

Send mail to jim@thunt.org with questions or comments about this web site.
Copyright © 2000 Sakane Lock & Security