This is my hobby as I retired from the workforce in 1995 as a professional engineer in mechanical. I was licensed as a novice around 1959 as KN4RVN. A year later after passing 13WPM code at the FCC and the general test I got my general. I got an advanced in 1970 as I could not pass 20 WPM code for the extra. Got the extra after I was in my 70s when code was not required and computer aids made studying easy. I am a real amateur radio operator, not a pro like some of you. LOL. I served four years in the US Navy from 1951-1955 with 3 years and 4 months aboard the USS Carter Hall LSD-3.
My antennas are a 5 band Hex Beam at about 50 ft using a modified hazer and a Rohn 25 40 ft tower with a 12ft mast, and a homebrew 40 meter bent dipole beam at 50 ft on a 25 ft boom using quad spreaders and a ham 2 to rotate it. I have a Ten Tec Eagle and an Ameritron AL 80A amp . I recently bought a TenTec Omni 6 with factory option 3 upgrade plus an AL 80 B amp to use on 40 meters. I built the two element 40 meter bent dipole beam. It has a driven element, a 25ft boom and a reflector. Looks from a distance like a cubical quad. It is on a 50 ft rohn 25 tower with a 10 ft mast and a hazer. I have relocated my shack from the basement to my spare bedroom room in the house. The 40 meter beam is 175 ft of coax from my shack now. My photos of the shack and 40 meter antenna are out of date. If I can figure out how to update them soon I will do that.
This next photo is my 40 meter bent dipole beam on a quad frame. The wire of the driven element is 69 ft. long fed at the top horizonal with an insulator but horiz. is only 18 ft long. A 25 ft. boom places another wire 72 ft long as a reflector on 40 meters. This is a full 1/2 wave length 2 element bent dipole beam. Also loads great on 15 meters and good on 17 meters. I run 900 watts usually . Signals sent are normally 59 plus in the states and even some DX. It is rotated with a Ham 2. I added my first ever tuner for the beam and it operates the entire 40 meter band with no reflected power now. This photo shows the center insulator, center feed coax, and a homebrew coax choke on a ferrous form attached to the spreader near the boom.
The reflector is just wire attached to the spreaders in the same configuration. Works great
for a pile of junk.
I have made some changes since the photo. I removed the balun. I now use a hairpin match to step up the low impedence balanced antenna to 50 ohm unbalanced coax. Works great, made from # 12 wire. The vertical wires on the sides now drop straight down in lieu of bending back toward the boom.The elements are in an inverted U configuration now. I now run 900 to 1000 watts depending on the frequency. Great signal reports,also hears well. I extended the boom to 25 ft. changed the director to a reflector and altered the wire element lengths as modeled by Paul,K4HKX. Works better, project finished.
My latest modification in Sept. 2015 was to add a fixed director pointing North for the 40 meter beam. I now have 3 elements to Europe. I don't know how well it works but certainly did not hurt anything as most reports or 59 or 59 plus to Europe running about 900 watts.
�Bent dipole 2 element 40 Meter Homebrew Beam with Hazer on 50 ft tower.
6842904 Last modified: 2015-11-09 15:48:18, 4133 bytes
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