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HF Propagation


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20m Projects - Loop Antennas

Click to enlarge14 MHz Magloop by LY3H /A> by LY3LP
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 vergroting20m Loop Antenna by SMØVPO
Today I have no area of land to use for antennas. I have a glassed-in balcony on the 4th floor of an apartment block. I really like the 20m (14MHz) band so I will concentrate on that.

Click to enlargeA 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.

Click to enlargeBicycle 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 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

Click to enlargeWall Loop 20m by PD7MAA
This max. size open loop antenna for 14 MHz with a totall circumference of 6m. ( 19.68 feet ) is designed to attach to a wall . Not sutable for reenforced concrete walls . It has a no tune bandwidth of more than 300 KHz with a centre swr of 1 : 1.1.

Creation date : 12/08/2007 @ 21:45
Last update : 27/09/2020 @ 18:06
Category : 20m Projects
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