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Ham Radio . Magnum Experimentum

Antennas, experiments, engineering and other articles of interest to radio folks.

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  • Radio Shorthand
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    • Morse Code
    • Phonetic Alphabet
    • Q Signals
    • RST Signal Report
  • Tech Talk
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    • Logging Software
  • Amateur Radio, Why?
  • About
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    • Contact
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    • Advertise
  • Subjects
    • Activities
    • Antennas
    • contesting
    • Connectors
    • Digital Modes
    • EmComm
    • Installations
    • interfaces
    • Introspection
    • Lab Shootouts
    • Miscellaneous
    • mobile
    • NEC Shootouts
    • News
    • Operating Tips
    • power supply
    • Accessories
    • Promoting
    • Propagation
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J-Pole

History, simulations, measurements and real experiences of the famous, or infamous, J-Pole antenna.

Can a 2m J-Pole be used at 440?

March 5, 2015December 17, 2008

Analysis to suggest you really can use a 2 meter J-Pole in the 70cm band.

Categories Antennas Tags 2m, 70cm, J-Pole

1/2 Wave vs. 5/4 Wave VHF EZNEC Shootout

November 3, 2018December 16, 2008

Longer is not always better in the world of antennas. Such is the case of the 5/4 wave vertical antenna… a Super J-Pole Wannabe Antenna.

Categories Antennas, NEC Shootouts Tags 2m, 5/4 wave, 5/8 wave, collinear, full wave, half wave, J-Pole

Jpole vs. Coaxial Dipole EZNEC Shootout

May 23, 2018November 27, 2008

This J-Pole, Monopole, Coaxial Dipole VHF EZNEC shootout addresses a comment made that no models exist for j-pole and coaxial dipole antenna simulation.

Categories Antennas, NEC Shootouts Tags coaxial, dipole, J-Pole, monopole, VHF

1/4 Wave Monopole vs. 1/2 Wave J-Pole EZNEC Shootout

November 3, 2018November 6, 2008

Myths abound concerning how J-Poles do so well. Here is an EZNEC shootout between a 2 meter J-Pole and a Monopole with radials.

Categories NEC Shootouts Tags 2m, Cebik, EZNEC, J-Pole, monopole, NEC, Simulation

Copper J-Pole Antenna on Play Set

May 23, 2018November 1, 2008

Can a 2 meter J-Pole antenna work well on a child’s playset? Read and find out.

Categories Antennas Tags 2m, Baluns, J-Pole, MFJ, mount, verticals, VHF
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Topics & Keywords

2m 6m 10m 15m 20m 40m 43 foot 70cm 80m AHVD APRS Baluns battery BigIR copper Diamond dipole DX-Eng. EFHW Elecraft end-fed EZNEC Field Day Golden Packet hexbeam J-Pole Kenwood kj4faj KX3 kx4o measurement mobile NEC NMO NVIS packet PL259 QRP sdr Simulation SteppIR UHF vertical dipole verticals VHF
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