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Placing the ground radials of the monopole antennas usually used with 80 m fox hunting (radio orienteering) transmitters such that the runners do not risk getting entangled in them is time consuming.
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By Per Magnusson, SA5BYZ This is the sixth part in the article series about the FoxScope 2m ARDF receiver and describes how it is used.
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By Per Magnusson, SA5BYZ The receiver is mechanically based mostly on 3D-printed parts.
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By Per Magnusson, SA5BYZ In addition to the RF and processor boards described in previous articles, there are three simpler boards that make up the electronics of the receiver.
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By Per Magnusson, SA5BYZ This is the third part in the article series about the FoxScope 2m ARDF receiver.
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By Per Magnusson, SA5BYZ This is the second part in the article series about the FoxScope 2m ARDF receiver.
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By Per Magnusson, SA5BYZ This is the first in a series of articles describing a 2 m (144 MHz) direction finding receiver for “fox hunting”.
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I have previously published two versions of a 3D-printed tape measure Yagi antenna design for “fox hunting” on the 2m band (144 MHz): This article presents some slight improvements over the previous designs.
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Den här artikeln publicerades först i QTC nummer 2 2025.
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En resa mot krångligare mjukvara för attmed minimalistisk hårdvara få fina RF-egenskaper Den här artikeln publicerades först i QTC nummer 1 2025.
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Back in 2023, I published a 3D-printed tape measure Yagi antenna design for “fox hunting” on the 2m band (144 MHz).
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Många rävsaxar/pejlmottagare för radiopejlorientering är konstruerade så att de slås på när man kopplar in hörlurskontakten.
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I needed a small and inexpensive 3.3 V alphanumeric LCD for a project and found the 2×8 character RC0802A-TIY-ESV sold by tme.eu.
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When doing frequency synthesis with fractional-N PLLs, one often needs to find a rational approximation of a floating point number with the constraint that the numerator must not be larger than a certain number.
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I maintain a set of simple ARDF (amateur radio direction finding, or “fox hunting”) receivers of the type Compact 3,5F from OK2BWN for use by beginners.
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Den här artikeln publicerades först i QTC nr 5 2023.
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There is a newer version of this antenna in the following post: “Improved 2 m Fox Hunting Antenna“.
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Det här blogginlägget är andra och avslutande delen i en artikelserie där jag beskriver en mottagare (“rävsax”) för radiopejlorientering på 80m-bandet.
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Det här blogginlägget är första delen i en artikelserie där jag beskriver en mottagare (“rävsax”) för radiopejlorientering på 80m-bandet.
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Anyone who has tried to take a photo through the ocular of a microscope knows that it can be very hard to get the camera correctly positioned.