Simple Ham Radio Antennas

A few days ago, the good folks at eham.net ran a series of comments from amateur radio operators who used the MFJ 1622 portable antenna system.  The antenna consists of a tapped air coil, a 5 1/2 foot antenna, a counterpoise wire, a short length of coax, and a sturdy clamp to attach the antenna to a bench, railing, or other support.  I was gratified to see some positive reports on this compromise antenna, which, despite its faults, can get you on the air in a space-restricted environment.  The MFJ 1622 is a copy of an older design by B & K, which marketed the device in the 1970-1985 time frame.  I bought one of these when I was first licensed as a novice, used it with some success, and later stored it for emergency use. Presently, my B & K system is located in my van, along with some coax, a spare ATU, about 100-feet of wire, a deep-cycle marine battery, and some pre-cut counterpoise wire.  My trusty Yaesu FT-7 serves as the rig.  Despite the 10 to 20 watts output of the old

This has been a very busy day.  My xyl and I were asked to help with the annual May Day Celebration today at Laupahoehoe High School.  The students put on quite a show with Hawaiian Hula, chants, stories, and local music.  In the course of the day's events, several students asked about the antenna on the roof of my Odyssey van.  After I told them the antenna wasn't for CB, but rather for amateur radio, they seemed more interested in seeing what my modest rig would do.  So, I selected a frequency for one of the FM repeaters on the island of Maui and had a good time introducing some students to my fellow hams.  I also showed them my emergency HF setup behind the final row of seats.  I didn't have the HF antenna mounted, so I just let them look at the equipment (Yaesu FT-7), the huge deep cycle marine battery, the hamsticks near the sliding door, and the mag mount nestled under the last row of seats.  Too bad I wasn't better prepared for a show, but the VHF demonstration

THE FEEDING AND CARE OF THE INVERTED "V" ANTENNA In my last post, I described a simple inverted vee that could be built and erected by one person at a modest cost.  In my case, I had enough wire and and pvc mast sections to build this 40-10 meter antenna without going to the nearest hardware store.  Fortunately, I also had a hundred or so feet of 450-ohm twinlead, a spare 4:1 balun, and a good ATU (Drake MN-4) to finish the job.  With each leg of the "v" 33-feet long, you have an antenna that can work from 40 to 10 meters.  If you want to explore 80 meters, make both legs of the "v" 65-feet long.  These measurements are approximate--you may have to trim each leg a few inches to make a better match. If you don't have twin lead, you can also use approximately 40 to 50 feet of coax to feed the antenna.  Of course, the coax will feel happiest on one band and its third harmonic.  That characteristic makes it possible to use a 40-meter inverted "v&

How would you like to build a cheap, easily erected, and efficient antenna for your small yard?  I've pondered that idea over the past several days after a cold front and its associated high winds made a mess of my temporary, homebrew vertical next to my garage.  Since I had a few days off from my substitute teaching assignments, I decided to build another sky hook with materials I had in my "junk box."  I still had a good pvc mast, about 100 feet of number 14 housewire, and an extra 4:1 balun stashed in the corner near the washing machine.  Along with 50 feet of 450 ohm twin lead and about 20 feet of RG-6 coax, I was in business. The antenna would be an inverted "vee" inspired by a variety of articles in the ARRL Antenna Book, various amateur radio forums (e.ham, net), and a 1998 paper entitled "The $4 Special" by Joe Tyburczy, W1FGH.  The antenna won't rival a mono band beam on a 50-foot tower, but it will provide hours of good contacts at a sm

Do you remember your first amateur radio antenna?  I certainly do.  It was ugly, fed by cheap RG-58 coax, and connected to my first rig, the Heathkit HW-101.  I called it a dipole only because each side of the Budwig connector had 33-feet of 20-gauge wire attached.  The ends of this homebrew skyhook were attached to two trees about 35-feet high in the back yard of the teachers' cottage near the Honokaa High School.  That was 36 years ago--a time long gone except for my memory of many contacts as a novice and techncian class operator.  I surely had fun with this crude antenna.  It was home made and it was my own. Now jump forward to 2012.  I've been a general, advanced, and extra class ham since those glory days 3 1/2 decades ago.  I've gone through many rigs (most of them second-hand and well-used) and several types of antennas.  Yet, I still haven't lost the excitement of those novice class days.  For me, designing and erecting antennas are still fun, educational, an