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HF Propagation


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12m Projects - Antennas

Click to enlarge2 El. Yagi for 24MHz, with linear charge by IK4DCS
This English web page is still under construction.
The drawing (in Italian) is already available.

Click to enlarge24 / 28MHz mobile mini whip by JA1HWO
This "Mini Mobile Antenna" was also started from 144,430MHz, 50MHz and advanced this time. It is gradually improving while gaining know-how.

Click to enlarge3 + 3 El. Yagi for 12/17 Mt by IK4DCS
This English web page is still under construction.
The measures and drawing are already available.

Build a 12/17 Meter Trap Dipole by AD5X
Why a 12/17 meter rotatable dipole? Well, many folks have verticals for the lower bands, and multi-band dipoles or beams for 20-, 15-, and 10 meters. But often you don’t have an antenna for the 17- and 12-meter bands.

Click to enlargeRotary Dipole for 12/17 Mt by IK4DCS
After all the experiments on the WARC bands self-made antennas I had just to try with a coax-cable-trapped rotating dipole.

Click to enlargeUse a 28MHz antenna at 24.9MHz by JA1HWO
The quarter wavelength of the 12m band is 3m, so if you use a 10m band antenna, just add 0.5m (3-2.5). Even if the antenna is already shortened and the length is not 2.5m, the idea is the same.

Creation date : 12/08/2007 @ 22:45
Last update : 28/03/2020 @ 17:40
Category : 12m Projects
Page read 21643 times

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