Welland Valley Amateur Radio Society

Direction Finding

IntroductionBy Colin Lowe (G1IVG)

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Directional Finding“The WVARS Way”

• To use your radio and map reading skills to try to locate a hidden transmitter.

• Use of homebrew aerials, attenuators etc.

• Summer outdoor activity.

• Social Event.

No Speed Involved

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Equipment

• Receiver

• Attenuator

• Aerial

• Map

• Compass, Rule & Pencil

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Receiver

• Rx Signal Meter.

• Ear phones.

• Easy to handle.

• Good Battery.

• Aerial adaptor (SMA to BNC etc).

• 433.475 MHz FM.

• 2nd Harmonic = 866.95 MHz.

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Attenuator

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Aerial

• 70cm HB9CV.

• Homebrew (G7PZB).

• Buy.

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Map

• Ordinance Survey Map. (£7)

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Compass, Rule & Pencil

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Example of taking Bearings

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Bearing 1

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Bearing 2

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Bearing 3

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Calculated Location

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DF Fox Hunt18th July 2011

• 7pm Meet at Prince Rupert’s View Point.

• An open invite to KDARS to join us.

• 70cms (433.475 FM).

• Fox Located no more than 5 miles away.

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Prince Rupert’s View Point

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Prince Rupert’s View Point

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Hope to see you all on

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