2Meter Slim Jim Antenna
- This 2 Meter 300 Ohm Slim Jim antenna is constructed from regular 300 ohm twinlead
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post 14 Sep 2026
Antenna for UHF VHF Links →
Stacking with coax cables as transformation Lines
The HB9CV 144 Antennas
The normal-mode helix antenna
A 2-element 1/2 wave collinear J-Pole
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Stacking with coax cables as transformation Lines- The stacking cables are made of odd multiples of 1/4-coax-cables 3/4-, 5/4- or 7/4
The HB9CV 144 Antennas- The HB9CV is a well known two element antenna of a directional beam type with a forward gain of 4 to 5 dBd
The normal-mode helix antenna- A helix will work in the normal mode when the diameter and pitch of the helix is less than 0.1 Lambda When working in this mode the radiation is from the side of the helix, and when the diameter is considerably less than 0.1? the resultant 'spring' has a radiation pattern similar to a short vertical monopole or whip
A 2-element 1/2 wave collinear J-Pole- Build of a 2-element 1/2 wave collinear J-Pole
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