Ham Radio Antennas

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.”

To function as intended, the J-Pole antenna needs RF electrical isolation from its mount. Here’s why and in technicolor no less.

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.

My 43 foot vertical took a beating last night in the Canadian cold air clipper and lost its lower U-Bolt.

A Redskins fan uses Dallas Cowboys to further his pursuit of raising his hex beam to the sky.

The MFJ Analyzer products make easy work of tuning a coaxial quarter wave stub.

Two NMO through-hole antenna mount parts, the Laird MBO and MABO, were prototyped to help down select the choice of 3/8″ or 3/4″ hole. The opinions of engineers, machinists and others were obtained.

It’s time to replace my mag mount antenna and go “through hole” with my Mobile Antenna. NMO seems to be the way to go. Reviewed are some candidates from brand name to no name.

“Shocking” evidence our aerials collect electric charge plus an educational video on the topic of static electricity.