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80m Projects - Antennas
#C5DCF5

Click to enlarge80 Meter Frame Antenna by SMVPO
I keep on and on about my little balcony and the antenna restrictions it imposes on my HF antennas. This project was developed as a result of experiments to become QRV on 80 meters, again, using the little balcony.
http://sm0vpo.altervista.org/antennas/frameant.htm

Click to enlarge80/40m Vertical by EI7BA
I have always admired the Butternut vertical antennae. They are very well built, using good quality "doorknob" capacitors, and nice airwound low-loss coils. Having had an "HF2" for a while, I decided to see if I could make a homebrew "improved"..?? version.
http://www.iol.ie/~bravo/80&40mVertic.htm

Click to enlarge80/75 Meter 4-Square Array by K7EM
This array has been in use since 1989. The SWR from 3.5 to 3.9 is below 1.5:1. The F/R of the array is 20dB average and with some signals even better.
http://www.qsl.net/k7em/4square/4square.html

Click to enlarge80M 6 Foot Antenna by WB5CXC
Building the antenna is very easy and inexpensive. It has outperformed my other antennas (dipole made from two mobile whip antennas up 20 feet and a vertical w/o radials).
http://www.wb5cxc.com/80m_eh.html

Click to enlarge80m Cobra Doublet by MPZT
My current HF aerial is something that could be called an 80m Linear-Loaded Doublet known in the USA as a Cobra due to the snaking of the wires. In total, its around 18m of wire per leg folded 3 times and fed with 300-ohm balanced feeder. The overall flat-top length is 12m so able to fit into a typical UK garden (such as mine).
http://www.m0pzt.com/80m-cobra-doublet/

Click to enlarge80m Frame Antenna by DL1GSJ
This frame antenna was intended to be as easy as possible to build, mount and dismount. It was thought to travel around in my luggage on flights. It is built of 90cm long poles and a block in the centre. The cross will be held together by the tension of the wire.
http://www.qsl.net/dl1gsj/html/frame.html

Click to enlarge80m full size 1/4 wave GPA by ON7EQ
I decided to set up temporarily (during winter months) a full size GPA for 80m and check how well this would perform vs. the Butternut. I can report a very good performance on transmit for continental and transcontinental DX-ing.
https://www.qsl.net/on7eq/projects/80m_gpa.htm

Click to enlarge80m Inverted-L Antenna (Base-loaded for 160m) by MEZP
Given the small size of my garden even a long wire contorted with lots of bends wouldnt easily fit. A bent quarter-wave vertical (in inverted-L configuration) seemed the best approach.
http://m0ezp.squirrelhouse.biz/80m-inverted-l-base-loaded-for-160m/

Click to enlarge80m Short Dipole by 4S7NR
I have nothing much to write. Every one of us can't have a full size 80m dipole (even me). This is not good as a full size one, but it is much better than no antenna. HI!
http://www.qsl.net/qrp/ant/short80.htm

Click to enlargeA Short Dipole for 80m by 4S7NR
The antenna above has been described by Nadisha, 4S7NR and may be of interest to anyone wishing to get on 80M (3.5MHz) that have limited space available. L1 is 12 feet. L2 also is 12 feet and the overall length is 48 feet.
http://www.zerobeat.net/g3ycc/4s7nr.html

Click to enlargeA Simple Loop Aerial for 160/80 by G3YXM
The idea of this 160/80mtr aerial is that the tuning and matching components are kept out of the weather and within reach of the operator. If this sort of arrangement would fit your situation it's worth a try. The loop is made of thick cable, satellite coax is good because there's plenty of copper in the braid.
http://www.wireless.org.uk/loop.htm

Click to enlargeAn End Fed Halfwave Antenna by G3YCC
This end fed type of antenna was marketted in the UK and is a useful system for the portable set-up. Being a half wave, no radials or counterpose wires are needed.
http://www.zerobeat.net/g3ycc/endfed.htm

Klik voor vergrotingCoil-loaded 40/80 Meter Inverted V Dipole Antenna by KGZZ
This 40 and 80 meter inverted V antenna is made with loading coils. It is a full size antenna on 40 meters and a shortened 80 meter antenna.
http://www.amateurradio.bz/40_80_meter_antenna.html

Click to enlargeDares 80 Meter Antenne door PE1KQP
Dit antenne ontwerp is robuust, goedkoop, snel op te bouwen en daardoor zeer geschikt voor DARES activiteiten. Er is geen antennetuner nodig want de SWR is bij juiste afstelling altijd beter dan 1.5 door het variren van de lengte aan de uiteinden met een M4 boutje en een vleugelmoertje .
http://pe1kqp.radiotreffen.nl/index.php?page=dares80meterantenne

Klik voor vergrotingGoedkoop op 80/40 (en 20/10 meter met tuner) zelfbouwdraadantenne door PA3HMP
Vanwege de vele positieve recties heb ik maar wat haast achter het tweede artikel gezet, dit ter meer omdat je beide draadantennes kan combineren en je dus een draadantenne kan maken met in iedere poot twee traps, ...
http://www.pa3hmp.nl/draadant-2.htm

Klik voor vergrotingMy slopers for 80 and 160 Mt by IK4DCS
As for all long-wire antennas also these that I am going to describe arevery simple but incredibly efficient. I actually discovered this type of antenna owing to some problems with available space around my house.
http://digilander.libero.it/ik4dcs/slopeng.html

Click to enlargeSpinneweb antenne door PE1KQP
Dit is een verkorte dipool antenne voor alle amateur banden die gevoed wordt door een symmetrische voedingslijn.
Dit verkorten gebeurt door aan het einde van de dipool twee spinnewebspoelen te plaatsen.
http://pe1kqp.radiotreffen.nl/index.php?page=spinnewebantenne

Click to enlargeThe 40/80/160 Meter Coil-loaded Inverted V Dipole Antenna by KGZZ
This coil-loaded inverted V dipole antenna is a resonate antenna that does not require the use of an antenna tuner. It will work all of the 40 meter band plus a portion of the 80 and 160 meter bands.
http://www.amateurradio.bz/40_80_160_meter_antenna.html

Click to enlargeThe End-Fed Halfwave Antenna by AA5TB
The end-fed halfwave antenna is among my favorite for field operation. It is easy to setup, can be used without a feedline, and performs well. The end-fed halfwave antenna is a resonant half wavelength long antenna ...
http://www.aa5tb.com/efha.html

The NJQRP Squirt by N2CX
This reduced-size 80-meter antenna is designed for small building lots and portable use. Its a fine companion for the Warbler PSK31 transceiver.
http://www.arrl.org/files/file/Technology/tis/info/pdf/0104040.pdf

Click to enlargeTop Fed Linear Loaded 3/4 wave length Vertical for 80 meters by KE4UYP
This is a vertically polarized Phased array. The left Vertical wire is 180 degrees out of phase with the middle and right Vertical wire. At 1/10 wavelength spacing from the right Vertical wire to the left Vertical wire it is producing a End-Fire Bidirectional Pattern,that developes a Gain of 5.9-DBi.
http://ke4uyp.tripod.com/80m_Antenna.html


Creation date : 12/08/2007 @ 11:27
Last update : 23/09/2018 @ 23:26
Category : 80m Projects
Page read 41254 times


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