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20m Projekten - Antenne's

Klik voor vergroting20M - 1 Foot Antenna by WB5CXC
I used 1" copper pipe to make my cylinders. They will fit snugly on a 3/4" PVC pipe. The PVC pipe will have to be sanded down to allow the copper pipe to fit.

Klik voor vergroting20m T-Monopole (Short Vertical) by AA5TB
During the very warm and extremely dry start to 2006 I thought it would be a good time to do some antenna experimenting. I wanted to see how well a ground mounted vertical monopole would work on 20m in my small city sized lot. The tallest vertical support that I had available at the time was a 10 foot long wooden pole.

Klik voor vergrotingBicycle Rim Antenna for 20 Metres by VK2ZAY
Several months ago ... I saw it was "clean-up week" ... one item caught my eye, an Aluminium bicycle rim. ... physically it was for a child's bike, only around 580 mm in diameter, but the Aluminium itself looked to be in good shape. Antenna was the immediate thought, ...

Klik voor vergrotingGoedkoop op 40/20 (en 10 meter met tuner) zelfbouwdraadantenne door PA3HMP
Al meer dan 5 jaar geleden heb ik al eens een paar goedkope traps gemaakt en er een klein stukje over op mijn website gezet, met de ontwikkelingen dat de Novice amateurs (binnenkort) op HF mogen leek het me eens een leuk idee om het netjes uit te werken.

Klik voor vergrotingHomebrew compact 20m yagi by MØDGQ
This yagi antenna is particularly suitable for those with small plots ( myself included ) who wish to use a 2 element 20m yagi.

Klik voor vergrotingHomebrew Hexbeam Page by W1GQL
In August 2004 I had a QSO with Joe Italiano, N9PH, and Joe told me that he was turning "Martha" my direction. Joe told me that she was a homebrew Hexbeam made with bamboo poles that he had bought at K-Mart.

Klik voor vergrotingMagloop Antenna for 20m by LY3H
I was forced to use magloop (also known as STL – small transmitting loop) because I don’t have permission to build antennas on my roof. For loop I use cheap heating pipes

Klik voor vergroting'Shorty' Dipole for 14MHz by G3YCC
This mini dipole was described in Practical Wireless and Sprat recently in addition to the Five-Watter, the magazine of the Michigan QRP Club.

Klik voor vergrotingA Small Transmitting Loop Antenna for 14MHz and 21MHz by VK5BR
By definition, the small transmitting loop has a circumference less than one quarter of a wavelength. Because of its small size, it is possibly an attractive proposition for someone with inadequate space to erect a larger aerial.

Klik voor vergrotingQRP Beach Vertical 20m Moxon by M3KXZ
All my working is HF QRP SSB and I usually rely on my 8 metre fishing poles, trusty homebrew non-resonant 44ft doublet antennas (one at home and one for portable) and also a 10 metre tall homebrew vertical at home.

The 20m VersaTee Vertical Phased Array by KE4UYP
When setting up the two verticals the height above ground at the feed point / VersaTee equals 10 feet for both verticals. The elevated radials for example would both slope down to the north, If you want the array to be unidirectional and pointing to the North. The second vertical would be either East or west of the first one.

Klik voor vergrotingTwo elements YAGI for field day operation by VE3RGW
With the success on the invisible attic wire beam, a lot of club members showed their interest on this trial and discussed possibility of similar application.

Creatie datum : 12/08/2007 @ 21:45
Laatste wijziging : 27/11/2016 @ 18:26
Categorie : 20m Projekten
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