DIY Ground Plane omni directional RX antenna
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Nov 04, 2010
, 03:55 PM
Engineer for Christ
Joined Jun 2006
Construction: Coaxial cable type
For this type you need to cut 3 or 4 pieces (depending on how many grounded elements you want) of wire to your ¼ wavelength. Thomas uses 3. I will use 4.
Strip ¼ wavelength of the jacket from your coaxial cable and fold back the shield. You should have exactly ¼ wavelength worth of center conductor exposed.
Trim your folded over shield to about 1” (25mm) or so and twist it up into 3 or 4 strands 90 degrees (or 120 degrees for 3 conductors) apart. Tin those strands with solder to keep them stiff.
Now solder your ¼ wavelength wires to these strands so that the base of the wire butts into the coaxial cable.
Measure all of your elements being sure each is exactly ¼ wavelength from the center of the antenna. Trim if necessary.
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Measuring the elements
Elements and cable
Cable stripped and shield trimmed
Bottom side of antenna
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