DF2BO used EZNEC to design antennas so the gain and F/B are likely accurate.
For the same boom length you can get a lot more gain with an interlaced
element multi-band design if you can find one that covers the frequencies of
interest. Definitely there are very good tribander designs now! A SteppIR
motorized element Yagi is a completely different concept than a log Yagi so
I would not call them comparable.
John KK9A
Tony 73guddx at gmail.com wrote:
All:
Anyone using one of Optibeam's "Log Yagi" antennas? The documentation states
that they have several advantages over standard log-periodic designs - it
also mentions enhanced performance above the calculated gain, which is
attributed to the large radiation area of the antenna.
One of the models has a F/B of 35db which is pretty impressive for an HF
antenna.
See: https://www.optibeam.net/index.php?article_id=136&clang=1
Documentation: https://www.optibeam.net/files/logyagi_e.pdf
This might be a better choice compared to motorized multi-band antennas like
the SteppIR which are no longer in production.
Tony
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|