Ham Radio . Magnum Experimentum
Antennas, experiments, engineering and other articles of interest to radio folks.
Articles including references to the 10m amateur radio band.
KX4O/p Summits on the Air (SOTA) activation of Hawksbill Mountain (W4V/SH-001) on New Year’s Eve on 40, 20 and 10 meters.
The Asymmetrical Hatted Vertical Dipole (AHVD) worked quite well for some 10m contacts even with a load of ice on the elements.
The Asymmetrical Hatted Vertical Dipole (AHVD) prototype is an easy to build, portable alternative to other freestanding vertical HF antennas such as the Buddipole.
We re-introduce the theory and origins of Cebik’s (W4RNL) Asymmetrical Hatted Vertical Dipole (AHVD) antenna with the hope to facilitate a vertical polarization portable 20-10m aerial for portable operations.
Basic tests of the LNR Precision EF-10/20/40 multi-band portable HF EFHW antenna including S11, SWR and a bandwidth check of the match box.
The background and details of the LNR (Par Electronics) EF-10/20/40 end fed half-wave multi-band portable HF antenna. Come see what’s inside the mysterious “black box.”
My G3TXQ Hexbeam gets a new metal backbone to accommodate a VHF beam antenna. A byproduct is a much stronger antenna assembly than the common Hexbeam approach.
FDTD reveals Hex Beam behavior with real movies of magnetic and electric fields in time.
The Field Day Broadband G3TXQ Hex Beam works Hawaii from Virginia during Field Day.
Can the 10-20 meter five band HF G3TXQ broadband hex beam be used on 6 meters as is?
“Put a Hex on you…” Three antenna suppliers are making the Hex Beam antenna an easier choice for your next 20-10 meter beam.
In a previous post we promised to analyze the merits of the 43 foot tall tuner-required antenna vs. the adjustable BigIR vertical from SteppIR. We did and here are the results.
The BigIR antenna from Fluid Motion looks like a winner, but there are some concerns about the 80 meter option.