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The purpose of this page is to share my enthusiasm for Amateur Radio Direction FindingARDF is part of Amateur Radio 'Radio Sport'... which includes Contesting and Morse Code copying activities.

Boring History Lesson:

I got started in "Bunny Hunting" (as my Elmer's called it) back in the 1960s as a young ham. My Elmers, the 'old guys who smoked cigars', would pick me up and take me in their car to find the "bunny".  The bunny was another ham hiding out in his car somewhere in our small town of 15,000. The Bunny would make an occasional transmission on his TWO METER AM rig and the hunters would rotate their loop antennas mounted to broom handles and get a 'fix'.  Off in the car we would go to another spot and repeat the process.  After a couple of hours of not finding the bunny...  it seemed to me that he was getting bored and was coming up with comments that would taunt and insult the hunters.  It was great fun for a 14 year old and was my introduction to two meter AM... so I had to have a rig that would at least hear the bunny if I was left at home.  I saved up my paper route bucks and bought and built a this rig...

Shown is the Heathkit Two-er  or 2 meter lunchbox rig or HW-30.

It is a Xtal controlled Xmtr and a Regenerative Rcvr with built in 120VAC power supply.  The T-R switch is the lever knob on the lower right.

I still own one of these and it actually works.

In 1974 or so... after haming for about 11 years... I gave up amateur radio and  forgot about it whilst raising a family. 

In 2002, at the age of the "old guys who smoked cigars" I became interested in ham radio again.  I studied, passed the Morse Code test again (at boring slow speed), and became re-licensed .  My YL, Pat WT7N, and I were at a Radio Club of Tacoma meeting and watched a lecture / demo of ARDF, shown by Art Jury, KF7GD.   It was one of those 'Yreka' moments for me and the spark for Bunny Hunting was re-ignited.

After the Radio Club's show n tell ARDF meeting... I was asked by one of the officers if I would show a group of radio club members how to build the needed equipment so these folks could find their own bunnies at the upcoming radio club summer picnic. The homebuilt equipment consists of the Active Attenuator and Tape Measure Yagi directional antenna. 

The "Build It" activity was scheduled for a month before the picnic, interested folks signed up, parts were ordered, prototypes built and tested.  With Chuck AC7QN's help...they came and they built.

Under Construction..
but there are fotos to look at.

Get yourself a new HT Build Your Own
Active Attenuator
Build Your Own Fox Controller Build Your Own
Tape Measure Yagi




Ammo Can XMTRs



Commercially made International style XMTR

 
 
 
 
 
 
 
 

 

UPCOMING BUNNY HUNTS

Date and Time:

Saturday, July 16.... Eleven AM  to approx 4:00 PM.  Transmitters picked up at4:30 PM.

Location:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Fort Steilacoom Park    Click for Google Map...    that will give driving directions.

Start point is in the gravel parking lot that is nearest to the lake, very close to the "A" balloon indicator on the Google map.   View the satellite version of the Google map from the above link.  Magnify the image and see the parking lot closest to the lake.  It is  white colored gravel in the image.
 
Look for my vehicle.  It will have a tape measure Yagi or some other obvious ARDF ICON on the windshield.  You are there. 

                        
Regarding the Hunt:

CQ MAGAZINE... this hunt coincides with CQ Magazine's set date for the international hidden transmitter hunt - world wide.  So, our little hunt can be considered a 'worldly event'.
CLICK HERE for the CQ Mag Blurb.


8 TRANSMITTERS...  Your hosts Alan N7OMS, Chuck AC7QN, and Rich KR7W of the South Wahkiakum Amateur Radio Club... plan on hiding  8  transmitters:
         
ONE thru FIVE...  Five transmitters are of the international type:  All on the same frequency with #1 on for 60 seconds and shuts off.  Then #2 on for 60 seconds and shuts off.  Then #3 on for 60 seconds... and around the circle.  Example:  If you are close to XMTR #1... and it shuts off, you gotta wait 4 minutes for it to start back up. 

Tune to 146.430 MHz for XMTRs 1 to 5


FIVE INTERNATIONAL...   The XMTRs are lower power output (40 mW) and all of them may not be heard from the start location if you are using an active attenuator with a Handy Talky.

SIX-SEVEN-EIGHT...  The remaining three XMTRs are the Ammo Can type on separate frequencies.  These transmitters transmit for approx 30 seconds ON... then 35 seconds OFF.

One of these XMTRs will be an easy one for the beginners. 

One will be of intermediate difficulty for the beginner who just graduated to the intermediate class because he/she found the easy one. 

Tune to:  144.990 MHz      145.780 MHz       147.575 MHz


OF A HIGHER POWER...  The AMMO can XMTRs are higher power (500 mW to 1500 mW) and shoud be heard with  active attenuator hunt equipment from the start location.

ACTIVE ATTENUATOR...  When using a 4 MHz off set attenuator...   Program your HTs to be 4.0 MHz lower than the indicated freq shown above...  EXAMPLES:  to receive 144.900, program your HT to 140.990.    145.780 is received on 141.780,   147.575=143.575, and so on...

TRICKERY...  The third AMMO CAN XMTR will involve the use of TRICKERY (as Neil likes to call it) and hopefully will be challenging to find.   CLICK HERE to see last years champion of TRICKERY.

POLARIZATION...  of the XMTR Antennas will be HORIZONTAL.

WHACHA LOOKIN' FOR MISTER?...  No postage stamp sized thingys in this hunt.
 
FIND THE ICON...   that is attached to the antenna.  The transmitter is not always next to the antenna.  The icon will have a secret code of some type on it and you write it down...  as well of the time of day...  on your provided score card. 

ICONIC...  All XMTRs will have an icon similar to the foto to the right.   This is what you will be searching for.  On the difficult XMTRS... most of the time you will not be able to see the icon unless you are right on top of it.

CLICK foto to see the rest of the stuff that goes with this ICON.

Actually... the ICON is hidden pretty well. Once the guy in the foto faces it... it will be obvious to him.

MAPS... Your hosts will provide two different  maps and a DIY cardboard clipboard for your use.  The maps will have north-south meridian lines for the map n compass hunters who attend.

MORE MAPS...  Here's PDF copies of the maps we will hand out.  Print one of each out so you can begin your winning strategy.  The XMTR frequencies are shown on the maps.

DELORME MAP w/ Meridian Lines                         Google Satellite MAP w/ Meridian Lines

EQUIPMENT #1...  The above pdf maps have the frequencies listed incase you would like to program HTs or Sniffers ahead of time. 

EQUIPMENT #2...  So often we have interested folks who want to hunt hidden transmitters and they bring their Handy Talky and other equipment... but they are challenged on how to change the frequency of adjust the squelch.  So with this in mind... be sure to bring your equipments instruction manual... as it is just as confusing to us as it might be to you. 
Also, consider bringing a spare battery.

EQUIPMENT #3...  I have two sets of Tape Measure Yagi  antennas and  Active Attenuators on hand to loan out...  but please bring your own 2 Meter Handy Talkie... 
>>Note:  most of my loaner equipment uses BNC coax connections to the Handy Talky antenna jack. 
>>Bring the HTs instructions if you are not totally familuar with it.
>>
If you are new to Bunny Hunting... you can be paired up with another newbie to find the XMTR.

HOW DO I WIN?...  The winner is established in a Double Secret Probation meeting of the SWARC (aka AC7QN, N7OMS, KR7W).   We can be bribed.

WHAT DO I WIN?...
The selected winner gets 100 Kb of fame on this website... aka recognition.

Regarding Ft Steilacoom Park: 


This is a
 big  park... almost 400 acres, and it is all accessible on foot.  If you have not been to the park I suggest you use the Google maps Satellite view and zoom in.  Also, see the fotos from the Sept 2009 Hunt and scroll down to the map for an idea of what I am attempting to explain... CLICK HERE for fotos.

THINGS TO DO #1...  There is a fenced Dog Park within the parks boundaries.  Your partner can do the dog thing while you hunt rabbits.  Dogs must be on a leash if not in the dog park and if around me

THINGS TO DO #2...There is also a large children's play area.  You can take the kids there while your partner hunts rabbits.  Lots of stuff to do in this large park.  CLICK HERE for more PARK INFO.

PERSONAL COMFORT #1... If it rains or is extremely warm and sunny... there is no shelter... so dress accordingly.  There are Sani-Cans located in high use areas of the park as well as bushes to hide behind in the low use areas.   CHECK WEATHER REPORT HERE

PERSONAL COMFORT #2...  There is no food, drinks, or water to purchase in the park.  Supermarkets, McDonalds, and Quicky-marts are nearby on the way to the park.  Your transmitter hiders suggest you bring your own survival kit to manage your own personal comfort.

ACCESSIBILITY...  The gravel parking lot and the path to and around the lake is stroller / wheelchair friendly as I remember.  The parks link above may have more info regarding this.

REFRESH... Your transmitter hider hosts will provide bottled water and a limited amount of low glycemic snacks. There is a small chance we will have fresh coffee.   As mentioned above... take care of yourself by bringing stuff to meet your needs.


email me with questions:  bunnyhunt@kr7w.org

Thanks...Rich kr7w


PHOTOS of Previous Hunts

May 10, 2008
Radio Club of Tacoma hunt at Pt Defiance Park.
International Fox Hunt Weekend.
Sept 12, 2009
N7OMS, AC7QN, KR7W hunt at Fort Steilacoom Park
   






 

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