During my radio amateur activity, I have already tried many HF antennas. Some I built according to their instructions, others I built more according to my capabilities QTH. Zaujímavé vlastnosti mala predposledná verzia. Dipól 2 × 19,6 m s ramenami tvorenými vždy dvoma fosforbronzovými drôtmi vo vertikálnej vzdialenosti 1 m od seba, na vzdialenom konci navzájom izolovanými, invertovaný z 15 m na 8 m, sa správal veľmi prívetivo.
S prispôsobovacím členom FRITZEL 1 : 1 neprekročil na žiadnom pásme PSV 2, so there was no need to use any transmatch. After the previous lying Delta Loop, which did not do without adaptation, it was quite cool.
When designing and building this antenna, I used everything I could find about antennas on the Internet. I started from the theoretical assumption of a broadband dipole with a conductor thickness of 1 m, which will expand even further if the ends of such a maxiconductor (formed by two modest wires) are not electrically connected. The dipole surprisingly behaved as I expected. It resonated acceptably on all frequencies used. At 3.5 and 10.1 MHz, a PSV of 1.2 was measured, and at 1.8 and 21 MHz, a PSV of 2. The other frequencies were within this interval.
Alas - one day earlier this summer, the Technical Services came and one end of the antenna, attached to a street light pole, found itself on the ground without warning. According to a somewhat curious explanation, it was at the initiative of the municipal office, which ordered the painting of the pillars, and the company refused to guarantee the painting around the various signs on the pillars. Surprisingly, dozens of traffic signs and local orientation boards did not mind.
This roughly one-year experiment showed that even today it is possible to successfully experiment with dipole antennas. It just requires a little more land and patience.
OK1FTJ