PA8W ( DL/PA8W/P )

Amateur Radio

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Radio Direction Finding

    New: RDF42 added!

September 9, 2018 : Winner of  the Dutch  National Balloonfoxhunt.
Teams # 2 and 3 also using PA8W design dopplers!

After participating in the Dutch annual Balloonfoxhunt for a few years, sometimes finishing as #3,
this time me and my friend PA0TGA using my RDF40 and RDF42 doppler RDF's were the first team to get to the balloon transmitter.

With a fixed RDF42 at my home QTH and my good old RDF40 in the car, and RDF-Mapper running on a laptop to show both bearing lines plus our own position, we were able to stay right below the ballon for most of the 3,5 hours long flight.

The initial challenge of this Balloonfoxhunt is to first pinpoint the secret launch spot.
Once that is secured, some track predictions give us an indication where to go to intercept the balloon.
In this case we drove up north to Apeldoorn, where we were a little behind, and we proceeded east following the balloon until we were right underneath.
This way we had to stop a few times to let the balloon pass by and so after quite some time we were a little over the German border waiting for the balloon to burst.
After the burst we had to speed up to 150kmh to stay close and managed to be at about 2km distance when we heard the transmitter land at the other side of a small river. 
7 minutes later we were at the landing spot in the woods. 
In total 53 teams arrived there, over a time span of about an hour, which is the largest number since the Balloonfoxhunt started 40 years ago.

My appreciation and thanks go to the organizers of the Ballonfoxhunt,
to Jonathan Musther who wrote this magnificent RDF-Mapper for me,
to Patrick PD2PC who provided me a pretty good second bearing from Assen with the help of a friend,
and of course to Tonnie PA0TGA my team mate.

73's, Wil, PA8W,  E-mail:

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